Prefabricated beam-slab connecting structure

Abstract

The application provides an assembled beam-slab connecting structure, relates to the technical field of building structures, and can improve the installation efficiency of the assembled beam-slab connecting structure. The assembled beam-slab connecting structure comprises a prefabricated beam, a prefabricated slab and a connecting piece. The two opposite side walls of the prefabricated beam are respectively provided with first inner recesses along a first direction. The side of the prefabricated slab close to the prefabricated beam is connected with the first inner recesses. The prefabricated beam is provided with at least one through slot extending along the first direction. The prefabricated slab is provided with at least one second inner recess extending along the first direction. The two opposite second inner recesses are communicated with the through slot and form a first recess. The first bottom wall of the second inner recess is provided with a second recess with an opening facing the connecting piece. The connecting piece comprises a first extension. The connecting piece is accommodated in the first recess. At least part of the first extension is accommodated in the second recess to connect the prefabricated beam and the two prefabricated slabs.

Description

Technical Field

[0001] This application relates to the field of building structure technology, and more specifically, to a prefabricated beam-slab connection structure. Background Technology

[0002] With the continuous development of prefabricated building structures, building structures that connect precast beams and precast slabs have been widely used in various industries. Currently, precast composite beams and precast composite slabs are usually connected by steel bars and then concrete is poured. However, this prefabricated beam-slab connection structure has a complex construction process, low industrialization level, slow construction speed, serious pollution at the construction site, and high resource consumption.

[0003] Therefore, how to improve the installation efficiency of prefabricated beam-slab connection structures has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] This application provides a prefabricated beam-slab connection structure that can improve the installation efficiency of the prefabricated beam-slab connection structure.

[0005] In a first aspect, a prefabricated beam-slab connection structure is provided, comprising: a prefabricated beam, a prefabricated slab, and connectors; wherein, the prefabricated beam has two opposite sidewalls along a first direction, each having a first recess extending along a second direction; the prefabricated slab has a sidewall near the prefabricated beam connected to the first recess; the prefabricated beam has at least one through groove extending along the first direction at its end near the prefabricated slab along its height direction; the prefabricated slab has at least one second recess extending along the first direction at its end near the prefabricated beam; and the two opposite sidewalls along the first direction have... The second recessed portion communicates with the through groove and forms a first groove. The first bottom wall of the second recessed portion is provided with a second groove with an opening facing the connector. The connector includes a first main body and a first extension. The first main body extends along the first direction. The first extension is connected to the end of the first main body along the first direction and extends towards the first bottom wall. The connector is accommodated in the first groove. At least a portion of the first extension is accommodated in the second groove to connect the precast beam and the two precast slabs. The second direction is perpendicular to the first direction and parallel to the plane where the precast slab is located.

[0006] In this embodiment, the above technical solution achieves the connection between two adjacent precast slabs and a precast beam by using a connector disposed in a first groove. Specifically, the end of the precast slab near the precast beam is provided with at least one second concave portion extending along the first direction. The first bottom wall of the second concave portion is provided with a second groove opening towards the connector. The connector includes a first main body and a first extension portion. At least a portion of the first extension portion is accommodated in the second groove to connect the precast beam and the two precast slabs. Compared with the prior art, which requires connecting the precast composite beam and the precast composite slab with steel bars and then pouring concrete on site, this application can achieve the connection between the precast slab and the precast beam through the connector. This is a dry connection, with a simple installation process and fast construction speed. It can effectively improve the installation efficiency of the precast beam-slab connection structure, and has a high degree of industrialization, reducing pollution at the construction site and reducing resource consumption.

[0007] In one possible implementation, the connector includes a plurality of the first extensions, which are spaced apart along the second direction. Each first extension includes a first sub-extension and a second sub-extension that are connected to each other. One end of the first sub-extension is connected to the first main body and extends along the first direction away from the first main body. The second sub-extension extends along the height direction of the precast beam and toward the precast slab. At least a portion of the second sub-extension is accommodated in the second groove.

[0008] In this embodiment, the connector includes a plurality of first extensions, which are spaced apart along the second direction. Each first extension includes a first sub-extension and a second sub-extension that are connected to each other, and at least a portion of the second sub-extension is accommodated in the second groove. This effectively improves the fixing effect of the connector on the precast slab, thereby enhancing the tensile strength of the prefabricated beam-slab connection structure, increasing the connection strength between the precast slab and the precast beam, and thus improving the installation efficiency of the prefabricated beam-slab connection structure.

[0009] In one possible implementation, the first main body includes a first sub-connecting part and a second sub-connecting part that are interconnected. The prefabricated beam-plate connection structure also includes a first fixing structure that is snapped into the first sub-connecting part and the second sub-connecting part to limit the displacement of the first sub-connecting part and the second sub-connecting part in the first direction.

[0010] In this embodiment of the application, by setting a first fixing structure in the prefabricated beam-slab connection structure, the first fixing structure is snapped together with the first sub-connecting part and the second sub-connecting part, which can effectively limit the displacement of the first sub-connecting part and the second sub-connecting part in the first direction, and improve the fixing effect of the connector on the prefabricated slab and the prefabricated beam, thereby enhancing the connection strength between the prefabricated slab and the prefabricated beam.

[0011] In one possible implementation, the first sub-connecting part and the second sub-connecting part are respectively provided with a first through hole penetrating the first main body part along the height direction of the precast beam. The first fixing structure includes a first connecting rod and a bolt. The bolt is threadedly connected to the first through hole. The head of the bolt is provided with a third groove with an opening away from the connector. The two ends of the first connecting rod along the first direction are respectively provided with second extensions. At least a portion of the second extensions is accommodated in the third groove.

[0012] In this embodiment, the first sub-connecting part and the second sub-connecting part are respectively provided with a first through hole penetrating the first main body part along the height direction of the precast beam, and the first fixing structure includes a first connecting rod and a bolt. By threading the bolt to the first through hole, and the head of the bolt is provided with a third groove with an opening away from the connector, and the two ends of the first connecting rod along the first direction are respectively provided with second extensions, at least part of the second extensions are accommodated in the third groove, thereby effectively improving the fixing effect of the connector on the precast slab and the precast beam, and enhancing the connection strength between the precast slab and the precast beam.

[0013] In one possible implementation, the first sub-connecting part and the second sub-connecting part are rotatably connected about the second direction. Thus, in this embodiment, by configuring the connector so that the first sub-connecting part and the second sub-connecting part are rotatably connected about the second direction, the flexibility of installation and disassembly of the connector can be improved, thereby increasing the installation efficiency of the prefabricated beam-slab connection structure.

[0014] In one possible implementation, the end of the first sub-connector near the second sub-connector is provided with a third recess, and the end of the second sub-connector near the first sub-connector is provided with a first protrusion. The third recess is engaged with the first protrusion. The third recess is provided with two second through holes extending along the second direction, and the first protrusion is provided with a third through hole extending along the second direction. The second through holes communicate with the third through hole.

[0015] In this embodiment, a third recess is provided at the end of the first sub-connecting part near the second sub-connecting part, and a first protrusion is provided at the end of the second sub-connecting part near the first sub-connecting part. The third recess is engaged with the first protrusion. The third recess is provided with two second through holes extending along the second direction, and the first protrusion is provided with a third through hole extending along the second direction. The second through holes communicate with the third through hole, so as to realize the rotation of the first sub-connecting part and the second sub-connecting part around the second direction. This can effectively improve the flexibility of the installation and disassembly of the connector, thereby improving the installation efficiency of the prefabricated beam-plate connection structure.

[0016] In one possible implementation, the prefabricated beam-slab connection structure further includes a second connecting rod, which passes sequentially through two second through holes and a third through hole along the second direction and through the connector. Thus, in this embodiment, by providing a second connecting rod in the prefabricated beam-slab connection structure, which passes sequentially through two second through holes and a third through hole along the second direction and through the connector, a rotational connection between the first sub-connecting part and the second sub-connecting part around the second direction can be achieved. This effectively improves the flexibility of installation and disassembly of the connector, thereby increasing the installation efficiency of the prefabricated beam-slab connection structure.

[0017] In one possible implementation, the third recess and the first protrusion form a sleeve structure extending along the second direction, and a rolling bearing is disposed inside the sleeve structure. Thus, in this embodiment, by configuring the third recess and the first protrusion as a sleeve structure extending along the second direction, and by disposing of a rolling bearing inside the sleeve structure, the rotation of the second connecting rod due to friction is reduced, thereby minimizing damage to the second connecting rod and its service life. This improves the rotational stability of the first and second sub-connecting parts in the connector, effectively enhancing the flexibility of installation and disassembly of the connector, and ultimately improving the installation efficiency of the prefabricated beam-plate connection structure.

[0018] In one possible implementation, a portion of the connector is a telescopic structure used to adjust its dimensions in the first direction. Thus, in this embodiment, by setting a portion of the connector as a telescopic structure for adjusting its dimensions in the first direction, it becomes suitable for dry connections between precast beams and slabs of different sizes and types. This also absorbs tolerances during the connection process, effectively improving the flexibility of installation and disassembly of the connector, thereby increasing the installation efficiency of the prefabricated beam-slab connection structure.

[0019] In one possible implementation, at least a portion of the surface of the connector is coated with a high-entropy alloy coating. Thus, in this embodiment, by coating at least a portion of the surface of the connector with a high-entropy alloy coating, the structural strength, wear resistance, and corrosion resistance of the connector can be effectively improved, thereby enhancing the connection strength of the prefabricated beam-slab connection structure.

[0020] In one possible implementation, the composition of the high-entropy alloy coating includes at least one of the following: CoCrFeNiZr alloy, AlCoCrFeNiTi alloy, AlCoCrCuFeNi alloy, CoCrFeNiN alloy, FeCrMnNiMoN alloy, AlTiCrVFeMn alloy, and AlCrMoTiW alloy.

[0021] In one possible implementation, the prefabricated beam-plate connection structure includes a plurality of the first grooves and a plurality of the connectors, wherein the first grooves correspond one-to-one with the connectors and the first grooves are arranged at equal intervals along the second direction.

[0022] In this embodiment of the application, by providing a plurality of first grooves and a plurality of connectors in the prefabricated beam-slab connection structure, and by having the first grooves correspond one-to-one with the connectors, and by arranging the first grooves at equal intervals along the second direction, the connection strength of the prefabricated beam-slab connection structure is effectively improved, and the installation efficiency of the prefabricated beam-slab connection structure is enhanced.

[0023] In one possible implementation, the dimension L1 of the connector in the first direction satisfies: 250mm≤L1≤750mm.

[0024] In one possible implementation, the dimension L2 of the first sub-extension in the first direction satisfies: 100mm≤L2≤200mm.

[0025] In one possible implementation, the dimension L3 of the second sub-extension in the height direction of the precast beam satisfies: 30mm≤L3≤60mm.

[0026] In one possible implementation, the prefabricated beam-slab connection structure further includes an embedded part extending along the second direction and a first plate-like structure. The embedded part includes a third sub-connecting part and a fourth sub-connecting part that are connected to each other. The third sub-connecting part is embedded inside the precast slab, and the fourth sub-connecting part protrudes toward a first surface of the precast slab away from the connecting part. The first plate-like structure is disposed on the side of the fourth sub-connecting part near the precast beam, and the fourth sub-connecting part is elastically connected to the first plate-like structure.

[0027] In this embodiment, the third sub-connection of the embedded part is embedded inside the precast slab, and the fourth sub-connection of the embedded part protrudes toward the first surface of the precast slab away from the connector. The two side walls of the precast beam along the first direction are respectively provided with the first plate-like structure, and the fourth sub-connection is elastically connected to the first plate-like structure. This plays a role in buffering pressure and deformation during the connection process between the precast beam and the precast slab, reducing the risk of collision or squeezing between the precast beam and the precast slab, and improving the stability of the connection between the precast beam and the precast slab.

[0028] In one possible implementation, the first plate-like structure is connected to the sidewall by one of the following connection methods: welding, bonding, or bolting. Thus, in this embodiment, connecting the first plate-like structure to the sidewall by one of the following connection methods—welding, bonding, or bolting—improves the installation efficiency of the prefabricated beam-plate connection structure.

[0029] In one possible implementation, a buffer structure is provided between the third bottom wall of the first recess near the first surface and the first surface, where the first surface is the surface of the precast slab furthest from the connector. Thus, in this embodiment, by providing a buffer structure between the third bottom wall of the first recess near the first surface and the first surface, a buffering effect is achieved during the installation of the precast slab and the precast beam, reducing the risk of collision or compression between the precast beam and the precast slab, and improving the stability of the connection between the precast beam and the precast slab.

[0030] In one possible implementation, the prefabricated beam-slab connection structure further includes a second fixing structure extending along the second direction. The second fixing structure is disposed on the side of the prefabricated slab near the connector. The second fixing structure includes a second plate-like structure and an anchor. The second plate-like structure is connected to the connector. One end of the anchor is connected to the second plate-like structure, and the other end of the anchor extends in a direction away from the connector. At least a portion of the anchor is located inside the prefabricated slab.

[0031] In this embodiment of the application, by providing a second fixing structure extending along the second direction in the prefabricated beam-slab connection structure, the second fixing structure includes a second plate-shaped structure and an anchor, and the second plate-shaped structure is connected to the connector. One end of the anchor is connected to the second plate-shaped structure, and the other end of the anchor extends away from the connector. At least a portion of the anchor is located inside the precast slab, which can effectively improve the connection strength between the connector and the precast slab, while also improving the tensile strength of the prefabricated beam-slab connection structure and the connection strength between the precast slab and the precast beam, thereby improving the connection strength of the prefabricated beam-slab connection structure.

[0032] In one possible implementation, the precast beam includes a plurality of through slots and a plurality of connectors, with each through slot corresponding to one of the connectors. A second protrusion between any two adjacent through slots is provided with a fourth through hole that extends through the second protrusion along the second direction. The fourth through hole is used to connect the plurality of connectors.

[0033] In this embodiment of the application, multiple through slots and multiple connectors are provided in the precast beam. Each through slot corresponds to a connector, and a fourth through hole is provided in the second protrusion between any two adjacent through slots, which is used to connect multiple connectors. This facilitates the installation and disassembly of the connectors and makes it easier to adjust the position of the connectors, thereby improving the flexibility of the installation and disassembly of the connectors and improving the installation efficiency of the prefabricated beam-slab connection structure. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of the prefabricated beam-slab connection structure provided in one embodiment of this application.

[0035] Figure 2 This is a schematic diagram of the overall structure of the prefabricated beam-slab connection structure provided in another embodiment of this application.

[0036] Figure 3 This is a schematic diagram of the structure of a connector provided in an embodiment of this application.

[0037] Figure 4 This is a cross-sectional schematic diagram of a connector provided in another embodiment of this application.

[0038] Figure 5 This is a cross-sectional schematic diagram of a connector provided in another embodiment of this application.

[0039] Figure 6 This is a cross-sectional schematic diagram of a connector provided in another embodiment of this application.

[0040] Figure 7 This is a schematic diagram of the structure of a connector provided in another embodiment of this application.

[0041] Figure 8 This is a cross-sectional schematic diagram of the first connecting rod provided in an embodiment of this application.

[0042] Figure 9 This is a cross-sectional schematic diagram of a bolt provided in one embodiment of this application.

[0043] Figure 10 This is a cross-sectional schematic diagram of a bolt provided in another embodiment of this application.

[0044] Figure 11 This is an exploded structural diagram of a connector provided in another embodiment of this application.

[0045] Figure 12 This is a cross-sectional schematic diagram of a connector provided in another embodiment of this application.

[0046] Figure 13 This is a cross-sectional schematic diagram of a connector provided in another embodiment of this application.

[0047] Figure 14 This is a schematic diagram of the structure of a group of connectors provided in another embodiment of this application.

[0048] Figure 15 This is a schematic diagram of the structure of an embedded part provided in an embodiment of this application.

[0049] Figure 16 This is a cross-sectional schematic diagram of an embedded part provided in another embodiment of this application.

[0050] Figure 17 This is a cross-sectional schematic diagram of an embedded part provided in another embodiment of this application.

[0051] Figure 18 This is an exploded structural diagram of an embedded part provided in another embodiment of this application.

[0052] Figure 19 This is a cross-sectional schematic diagram of a prefabricated beam-slab connection structure provided in an embodiment of this application.

[0053] Figure 20 This is a cross-sectional schematic diagram of a prefabricated beam-slab connection structure provided in another embodiment of this application.

[0054] Figure 21 This is a cross-sectional schematic diagram of a prefabricated beam-slab connection structure provided in another embodiment of this application.

[0055] Figure 22 This is a schematic diagram of the overall structure of the second fixing structure provided in an embodiment of this application.

[0056] Figure 23 This is an enlarged structural schematic diagram of a prefabricated beam-slab structure provided in one embodiment of this application.

[0057] Figure 24 This is a schematic diagram of the equivalent stress distribution in a finite element simulation of a prefabricated beam-slab structure provided in an embodiment of this application.

[0058] Figure 25 This is a schematic diagram of the equivalent stress distribution in a finite element simulation of a prefabricated beam-slab structure provided in another embodiment of this application.

[0059] Figure 26 This is a schematic diagram of the equivalent stress distribution in a finite element simulation of a connector provided in an embodiment of this application.

[0060] Figure 27 This is a schematic diagram of the equivalent stress distribution in a finite element simulation of a connector provided in another embodiment of this application.

[0061] Figure 28 This is a schematic diagram of the equivalent stress distribution in a finite element simulation of a connector provided in another embodiment of this application.

[0062] Explanation of reference numerals in the attached figures:

[0063] 10-Assembled beam-slab connection structure; 110-Precast beam; 120-Precast slab; 130-Connector; 111-First recessed portion; 112-Through groove; 113-Side wall; 114-Second protrusion; 1141-Fourth through hole; 121-Second recessed portion; 122-First surface; 140-First groove; 1211-First bottom wall; 1212-Second groove; 1121-Second bottom wall; 131-First main body; 1311-First sub-connecting portion; 1312-Second sub-connecting portion; 132-First extension; 1321-First sub-extension; 1322-Second sub-extension; 133-First through hole; 134-Third recessed portion; 1341-Second through hole; 135-First protrusion; 1351-Third through hole; 136-Extendable structure; 150-First fixing structure; 151-First connecting rod; 1511-Second extension; 152-Bolt; 1521-Third groove; 160-Second connecting rod; 170-Embedded part; 171-Third sub-connecting part; 172-Fourth sub-connecting part; 174-First sleeve; 175-Elastic structure; 180-First plate structure; 1111-Third bottom wall; 190-Second fixing structure; 191-Second plate structure; 192-Anchor nail; 193-Second sleeve.

[0064] The accompanying drawings are not drawn to scale. Detailed Implementation

[0065] The implementation of this application will be further described in detail below with reference to the accompanying drawings and embodiments. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application, that is, this application is not limited to the described embodiments.

[0066] In the description of the embodiments of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0067] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0068] The term "and / or" in the embodiments of this application is merely a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. Additionally, the character " / " in the embodiments of this application generally indicates that the preceding and following related objects have an "or" relationship.

[0069] Unless otherwise defined, all technical and scientific terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing specific embodiments only and is not intended to limit the embodiments of this application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of the embodiments of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of the embodiments of this application are used to distinguish different objects, rather than to describe a specific order or hierarchy.

[0070] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0071] With the continuous development of prefabricated building structures, prefabricated beam-slab connection structures, which connect precast beams and precast slabs, have been widely used in various industries. Currently, precast composite beams and slabs are typically manufactured in the factory, transported to the site, and connected with steel bars before concrete pouring. This connection method requires on-site pouring, resulting in a complex construction process, low industrialization, slow construction speed, severe pollution at the construction site, and high resource consumption. Therefore, improving the installation efficiency of prefabricated beam-slab connection structures and simplifying the construction process has become an urgent technical problem to be solved in this field.

[0072] In view of this, this application provides a prefabricated beam-slab connection structure, which includes: a prefabricated beam, a prefabricated slab, and connectors; wherein, the prefabricated beam has two opposite sidewalls along a first direction respectively provided with a first recess extending along a second direction, the side of the prefabricated slab near the prefabricated beam is connected to the first recess, the end of the prefabricated beam near the prefabricated slab along the height direction of the prefabricated beam is provided with at least one through groove extending along the first direction, and the end of the prefabricated slab near the prefabricated beam is provided with at least one second recess extending along the first direction. The two second recesses communicate with the through groove and form a first groove. The first bottom wall of the second recess has a second groove with an opening facing the connector. The connector includes a first main body and a first extension. The first main body extends along the first direction, and the first extension is connected to the end of the first main body along the first direction and extends towards the first bottom wall. The connector is accommodated in the first groove, and at least a portion of the first extension is accommodated in the second groove to connect the precast beam and the two precast slabs. The second direction is perpendicular to the first direction and parallel to the plane where the precast slab is located. Thus, in this embodiment, compared with the prior art, which requires connecting the precast composite beam and the precast composite slab with steel bars and then pouring concrete on site, this application can achieve the connection between the precast slab and the precast beam through the connector. This is a dry connection, with a simple installation process and fast construction speed. It can effectively improve the installation efficiency of the precast beam-slab connection structure, and has a high degree of industrialization, reducing pollution at the construction site and reducing resource consumption.

[0073] It should be understood that in the field of building structure technology, both precast beams and precast slabs are precast concrete components used in building structures. They can be prefabricated in a factory and then transported to the construction site for assembly and installation. Precast beams are precast concrete components, typically with rectangular or T-shaped cross-sections. These beams can be reinforced with prestressed steel bars or ordinary steel bars according to design requirements to increase their load-bearing capacity and bending resistance. They are widely used in beams, floor slabs, and other parts of building structures to bear floor loads and transfer them to columns or walls. Precast slabs are another type of precast concrete component, typically with a rectangular or square flat plate shape. These slabs can be reinforced with prestressed tendons or steel mesh as needed to increase their load-bearing capacity and bending resistance. They are used in floor systems, roof systems, and other structures requiring large-area horizontal support, reducing on-site construction difficulty and increasing construction speed.

[0074] Figure 1 A schematic diagram of the prefabricated beam-slab connection structure 10 provided in an embodiment of this application is shown. Figure 2 A schematic diagram of a prefabricated beam-slab connection structure 10 according to another embodiment of this application is shown. Figure 1 and Figure 2 As shown, Figure 1 The prefabricated beam-slab connection structure 10 shown in the figure is provided with a connector 130 for connecting the prefabricated beam 110 to two adjacent prefabricated slabs 120. Figure 2 The prefabricated beam-slab connection structure 10 shown in the figure does not have a connector 130. Figure 3 A schematic diagram of the structure of a connector 130 provided in an embodiment of this application is shown. Figure 4 A cross-sectional schematic diagram of a connector 130 provided in another embodiment of this application is shown. Figure 5 A cross-sectional schematic diagram of a connector 130 provided in another embodiment of this application is shown. Figure 6 A cross-sectional schematic diagram of a connector 130 according to another embodiment of this application is shown. Exemplarily, Figures 4 to 5 Can be Figure 4 The diagram shows cross-sectional views of the connector 130 in different directions.

[0075] It should be understood that, for ease of description, the embodiments in this application are described as follows: Figure 1 and Figure 2As shown, direction X can be the length direction of the prefabricated beam-slab connection structure 10, which is perpendicular to direction Z and direction Y; or direction X can be the width direction of the prefabricated beam 110; or direction X can be the length direction of the prefabricated slab 120; or direction X can be the length direction of the connector 130. Direction Y can be the width direction of the prefabricated beam-slab connection structure 10, which is perpendicular to direction Z and direction X; or direction Y can be the length direction of the prefabricated beam 110; or direction Y can be the width direction of the prefabricated slab 120; or direction Y can be the width direction of the connector 130. Direction Z can be the height direction or thickness direction of the prefabricated beam-slab connection structure 10, which is perpendicular to direction X and direction Y; or direction Z can be the height direction of the prefabricated beam 110; or direction Z can be the thickness direction of the prefabricated slab 120; or direction Z can be the thickness direction of the connector 130.

[0076] In some implementations, such as Figures 1 to 6 As shown, the prefabricated beam-slab connection structure 10 includes: a precast beam 110, a precast slab 120, and a connector 130. The precast beam 110 has two opposite sidewalls 113 along a first direction, each with a first recess 111 extending along a second direction. The side of the precast slab 120 near the precast beam 110 is connected to the first recess 111. The precast beam 110 has at least one through groove 112 extending along the first direction at its end near the precast slab 120 along its height direction. The precast slab 120 has at least one second recess 121 extending along the first direction at its end near the precast beam 110. The two opposite second recesses 121 along the first direction are connected to the through groove 112. The first groove 140 is connected and formed. The first bottom wall 1211 of the second recess 121 is provided with a second groove 1212 with an opening facing the connector 130. The connector 130 includes a first main body 131 and a first extension 132. The first main body 131 extends along the first direction. The first extension 132 is connected to the end of the first main body 131 along the first direction and extends towards the first bottom wall 1211. The connector 130 is accommodated in the first groove 140. At least a portion of the first extension 132 is accommodated in the second groove 1212 to connect the precast beam 110 and the two precast slabs 120. The second direction is perpendicular to the first direction and parallel to the plane where the precast slab 120 is located.

[0077] It should be understood that in the embodiments of this application, the first direction may be direction X, that is, direction X may be the width direction of the precast beam 110, or direction X may be the length direction of the precast slab 120, or direction X may be the length direction of the connector 130. Correspondingly, the second direction may be direction Y, that is, direction Y may be the length direction of the precast beam 110, or direction Y may be the width direction of the precast slab 120, or direction Y may be the width direction of the connector 130.

[0078] It should also be understood that the connection between the side of the precast slab 120 near the precast beam 110 and the first recess 111 can mean that the side of the precast slab 120 near the precast beam 110 is bonded or snapped to the side wall of the first recess 111 near the precast slab 120. As an example, this application embodiment does not limit this.

[0079] It should also be understood that the first recess 111 and through groove 112 provided on the precast beam 110, and the second recess 121 provided on the precast slab 120, can all be prefabricated in the factory and then assembled and installed after being transported to the construction site. Specifically, after two adjacent precast slabs 120 are butt-jointed with a precast beam 110, the two second recesses 121 and the through groove 112 can form a first groove 140. The opening of the first groove 140 is away from the location of the precast beam 110, and the first groove 140 can be used to accommodate the connector 130.

[0080] It should also be understood that in the prefabricated beam-slab connection structure 10, the precast beam 110 and the two precast slabs 120 can be connected by the connector 130. For example, the connector 130 can be snapped into the prefabricated beam-slab connection structure 10 to achieve a dry connection between the precast beam 110 and the two precast slabs 120. This eliminates the need for additional concrete pouring between the precast beam 110 and the precast slabs 120, thus accelerating the installation efficiency of the prefabricated beam-slab connection structure 10, increasing the degree of industrialization, reducing on-site construction pollution, and reducing resource consumption.

[0081] It should also be understood that the shapes of the first groove 140 and the second groove 1212 can be set according to actual needs. As an example, this application embodiment does not limit this. For example, the shape of the first groove 140 and / or the second groove 1212 in the plane perpendicular to the Z direction can be rectangular.

[0082] It should also be understood that, in the embodiments of this application, at least a portion of the first extension 132 is accommodated in the second groove 1212, which means that at least a portion of the first extension 132 can be used to achieve a snap-fit ​​connection between the connector 130 and the precast beam 110 and the precast slab 120, so as to achieve a dry connection between the precast beam 110 and the two precast slabs 120.

[0083] It should also be understood that, in the embodiments of this application, during the installation of the prefabricated beam-slab connection structure 10, after the position of the prefabricated beam 110 is set, the prefabricated slab 120 is then hoisted, so that the side of the prefabricated slab 120 near the prefabricated beam 110 is connected to the first recess 111 of the prefabricated beam 110, so that the through groove 112 provided on the end of the prefabricated beam 110 near the prefabricated slab 120 along the height direction of the prefabricated beam 110 communicates with the two second recesses 121 opposite to each other along the first direction to form a first groove 140. Then, the connector 130 is placed in the first groove 140, so that at least a portion of the first extension 132 of the connector 130 is accommodated in the second groove 1212, so as to realize the connection between the prefabricated beam 110 and the two prefabricated slabs 120.

[0084] It should also be understood that the material of the connector 130 in the embodiments of this application can be set according to actual needs. For example, the material of the connector 130 can be low alloy high strength structural steel, such as Q355 steel, which has a yield strength of 355MPa.

[0085] In this embodiment of the application, the connection between two adjacent precast slabs 120 and a precast beam 110 is achieved by using a connector 130 disposed in the first groove 140. Specifically, the end of the precast slab 120 near the precast beam 110 is provided with at least one second recess 121 extending along the first direction. The first bottom wall 1211 of the second recess 121 is provided with a second groove 1212 opening towards the connector 130. The connector 130 includes a first main body 131 and a first extension 132. At least a portion of the precast beam 110 is accommodated in the second groove 1212 to connect the precast beam 110 and the two precast slabs 120. Compared with the prior art, which requires the precast composite beam and precast composite slab to be connected by steel bars and then concrete is poured on site, this application can achieve the connection between the precast slab 120 and the precast beam 110 through the connector 130. It is a dry connection, with a simple installation process and fast construction speed. It can effectively improve the installation efficiency of the precast beam and slab connection structure 10, and has a high degree of industrialization, reducing pollution at the construction site and reducing resource consumption.

[0086] In some implementations, such as Figures 1 to 6As shown, the connector 130 includes a plurality of first extensions 132, which are spaced apart along the second direction. Each first extension 132 includes a first sub-extension 1321 and a second sub-extension 1322 that are connected to each other. One end of the first sub-extension 1321 is connected to the first main body 131 and extends along the first direction away from the first main body 131. The second sub-extension 1322 extends along the height direction of the precast beam 110 and toward the precast slab 120. At least a portion of the second sub-extension 1322 is accommodated in the second groove 1212.

[0087] It should be understood that when multiple first extensions 132 are spaced apart along the second direction, the distance between two adjacent first extensions 132 in the second direction can be set according to actual needs. As an example, this application embodiment does not limit this.

[0088] It should also be understood that, in the embodiments of this application, the first sub-extension 1321 and the second sub-extension 1322 in the first extension 132 can be integrally formed or separately formed. When the first sub-extension 1321 and the second sub-extension 1322 are separately formed, the connection between the first sub-extension 1321 and the second sub-extension 1322 can be a welding connection or an adhesive connection.

[0089] In this embodiment, the connector 130 includes a plurality of first extensions 132, which are spaced apart along the second direction. Each first extension 132 includes a first sub-extension 1321 and a second sub-extension 1322 that are connected to each other. At least a portion of the second sub-extension 1322 is accommodated in the second groove 1212. This effectively improves the fixing effect of the connector 130 on the precast slab 120, thereby enhancing the tensile strength of the prefabricated beam-slab connection structure 10 and the connection strength between the precast slab 120 and the precast beam 110, thus improving the installation efficiency of the prefabricated beam-slab connection structure 10.

[0090] Figure 7 A schematic diagram of the structure of a connector 130 provided in another embodiment of this application is shown. Figure 8 A cross-sectional schematic diagram of a first connecting rod 151 provided in an embodiment of this application is shown. Figure 9 A schematic cross-section of a bolt 152 provided in one embodiment of this application is shown. Figure 10 A schematic cross-section of a bolt 152 provided in another embodiment of this application is shown.

[0091] In some implementations, such as Figure 7As shown, the first main body 131 includes a first sub-connecting part 1311 and a second sub-connecting part 1312 that are connected to each other. The prefabricated beam-plate connection structure 10 also includes a first fixing structure 150, which is snapped into the first sub-connecting part 1311 and the second sub-connecting part 1312 to limit the displacement of the first sub-connecting part 1311 and the second sub-connecting part 1312 in the first direction.

[0092] It should be understood that the first main body 131 includes a first sub-connecting part 1311 and a second sub-connecting part 1312 that are connected to each other. On a plane perpendicular to the direction Y, the first sub-connecting part 1311 and the second sub-connecting part 1312 can be symmetrically arranged in shape to facilitate the processing and manufacturing of the connector 130.

[0093] In this embodiment of the application, by providing a first fixing structure 150 in the prefabricated beam-slab connection structure 10, the first fixing structure 150 is snapped together with the first sub-connecting part 1311 and the second sub-connecting part 1312, which can effectively limit the displacement of the first sub-connecting part 1311 and the second sub-connecting part 1312 in the first direction, and improve the fixing effect of the connector 130 on the prefabricated slab 120 and the prefabricated beam 110, thereby enhancing the connection strength between the prefabricated slab 120 and the prefabricated beam 110.

[0094] In some implementations, such as Figures 7 to 10 As shown, the first sub-connecting part 1311 and the second sub-connecting part 1312 are respectively provided with a first through hole 133 penetrating the first main body part 131 along the height direction of the precast beam 110. The first fixing structure 150 includes a first connecting rod 151 and a bolt 152. The bolt 152 is threadedly connected to the first through hole 133. The head of the bolt 152 is provided with a third groove 1521 with an opening away from the connector 130. The two ends of the first connecting rod 152 along the first direction are respectively provided with second extensions 1511. At least a portion of the second extensions 1511 is accommodated in the third groove 1521.

[0095] It should be understood that the shape of the third groove 1521 provided on the head of the bolt 152 can be matched with the shape of the second extension 1511. For example, on a plane perpendicular to the Z direction, if the shape of the second extension 1511 is rectangular, the shape of the third groove 1521 can be set to a corresponding rectangle so that at least a portion of the second extension 1511 is accommodated in the third groove 1521.

[0096] It should also be understood that during the installation of the first fixing structure 150 on the connector 130, the two bolts 152 can be threaded into the first through holes 133 on the first sub-connecting part 1311 and the second sub-connecting part 1312. Then, the two second extensions 1511 at the X-direction end of the first connecting rod 151 can be accommodated in the third groove 1521 on the bolts 152 to fix the connector 130 and restrict the displacement of the first sub-connecting part 1311 and the second sub-connecting part 1312 in the X-direction.

[0097] In this embodiment, the first sub-connecting part 1311 and the second sub-connecting part 1312 are respectively provided with a first through hole 133 penetrating the first main body part 131 along the height direction of the precast beam 110, and the first fixing structure 150 includes a first connecting rod 151 and a bolt 152. The bolt 152 is threadedly connected to the first through hole 133, and the head of the bolt 152 is provided with a third groove 1521 with an opening away from the connector 130. The first connecting rod 151 has a second extension part 1511 at both ends along the first direction, and at least part of the second extension part 1511 is accommodated in the third groove 1521, thereby effectively improving the fixing effect of the connector 130 on the precast slab 120 and the precast beam 110, and improving the connection strength between the precast slab 120 and the precast beam 110.

[0098] Figure 11 An exploded structural diagram of a connector 130 provided in another embodiment of this application is shown. Figure 12 A cross-sectional schematic diagram of a connector 130 provided in another embodiment of this application is shown. Figure 13 A cross-sectional schematic diagram of a connector 130 according to another embodiment of this application is shown. Exemplarily, Figure 12 and Figure 13 Can Figure 11 The diagram shows cross-sectional views of the connector 130 in different directions.

[0099] In some implementations, the first sub-connecting part 1311 and the second sub-connecting part 1312 are rotatably connected about the second direction. Thus, in this embodiment of the application, by setting the connector 130 so that the first sub-connecting part 1311 and the second sub-connecting part 1312 are rotatably connected about the second direction, the flexibility of the connector 130 in installation and disassembly can be improved, thereby improving the installation efficiency of the prefabricated beam-slab connection structure 10.

[0100] In some implementations, such as Figure 11As shown in Figure 13, the end of the first sub-connecting portion 1311 near the second sub-connecting portion 1312 is provided with a third recessed portion 134, and the end of the second sub-connecting portion 1312 near the first sub-connecting portion 1311 is provided with a first protruding portion 135. The third recessed portion 134 is engaged with the first protruding portion 135. The third recessed portion 134 is provided with two second through holes 1341 extending along the second direction, and the first protruding portion 135 is provided with a third through hole 1351 extending along the second direction. The second through holes 1341 and the third through holes 1351 are connected.

[0101] It should be understood that, in the embodiments of this application, the shape of the first protrusion 135 can be set according to actual needs. For example, the first protrusion 135 can be a cylindrical structure with a third through hole extending along the second direction. Correspondingly, the structure of the third recess 134 can be matched according to the shape of the first protrusion 135. As an example, the embodiments of this application do not limit this.

[0102] It should also be understood that, in the embodiments of this application, the second through hole 1341 and the third through hole 1351 can have the same shape on the plane perpendicular to the second direction. For example, the shape of the second through hole 1341 and the third through hole 1351 on the plane perpendicular to the second direction is circular or rectangular. As an example, the embodiments of this application do not limit this.

[0103] In this embodiment, a third recessed portion 134 is provided at the end of the first sub-connecting portion 1311 near the end of the second sub-connecting portion 1312, and a first protruding portion 135 is provided at the end of the second sub-connecting portion 1312 near the end of the first sub-connecting portion 1311. The third recessed portion 134 is engaged with the first protruding portion 135. The third recessed portion 134 is provided with two second through holes 1341 extending along the second direction, and the first protruding portion 135 is provided with a third through hole 1351 extending along the second direction. The second through holes 1341 and the third through holes 1351 communicate with each other, so as to realize the rotation of the first sub-connecting portion 1311 and the second sub-connecting portion 1312 around the second direction. This can effectively improve the flexibility of the installation and disassembly of the connector 130, thereby improving the installation efficiency of the prefabricated beam-plate connection structure 10.

[0104] Figure 14 A schematic diagram of the structure of a group connector 130 provided in another embodiment of this application is shown.

[0105] In some implementations, such as Figure 14As shown, the prefabricated beam-plate connection structure also includes a second connecting rod 160, which passes through two second through holes 1341 and a third through hole 1351 along the second direction and penetrates the connector 130.

[0106] It should be understood that, in the embodiments of this application, the shape of the second connecting rod 160 on the plane perpendicular to the second direction can be set according to the shape of the second through hole 1341 and the third through hole 1351, or the shape of the second through hole 1341 and the third through hole 1351 can be set according to the shape of the second connecting rod 160. For example, on the plane perpendicular to the second direction, the shape of the second connecting rod 160 can be set to a circle, and correspondingly, the shapes of the second through hole 1341 and the third through hole 1351 can be set to circles to match the second connecting rod 160, so that the second connecting rod 160 passes sequentially through the two second through holes 1341 and the third through hole 1351 along the second direction and penetrates the connector 130. As an example, this embodiment of the application does not limit this.

[0107] In this embodiment of the application, by providing a second connecting rod 160 in the prefabricated beam-slab connection structure 10, the second connecting rod 160 passes through two second through holes 1341 and the third through hole 1351 in sequence along the second direction and penetrates the connector 130, so as to realize the rotational connection between the first sub-connecting part 1311 and the second sub-connecting part 1312 around the second direction, thereby effectively improving the flexibility of the installation and disassembly of the connector 130, and thus improving the installation efficiency of the prefabricated beam-slab connection structure 10.

[0108] In some implementations, the third recess 134 and the first protrusion 135 are sleeve structures extending along the second direction, and a rolling bearing is provided inside the sleeve structure. Thus, in this embodiment, by setting the third recess 134 and the first protrusion 135 as a sleeve structure extending along the second direction, and providing a rolling bearing inside the sleeve structure, the rotation of the second connecting rod 160 due to friction is reduced, minimizing damage and extending the service life of the second connecting rod 160. This improves the rotational stability of the first sub-connecting portion 1311 and the second sub-connecting portion 1312 in the connector 130, effectively enhancing the flexibility of installation and disassembly of the connector 130, thereby improving the installation efficiency of the prefabricated beam-plate connection structure 10.

[0109] In some implementations, such as Figures 3 to 5 ,as well as Figure 7 As shown, part of the connector 130 is a telescopic structure 136, which is used to adjust the size of the connector 130 in the first direction.

[0110] It should be understood that, in the embodiments of this application, the material of the retractable structure 136 in the connector 130 may be one of the following: rubber, elastic alloy, elastic plastic, or elastic fiber. It should also be understood that the retractable structure 136 may be bonded or snapped together with other parts of the connector 130; however, this embodiment of the application does not limit this to any particular type.

[0111] In this embodiment of the application, by setting a portion of the connector 130 as a telescopic structure 136, and the telescopic structure 136 being used to adjust the size of the connector 130 in the first direction, it is suitable for dry connection between precast beams 110 and precast slabs 120 of different types and sizes. At the same time, it can absorb the tolerances in the connection process, effectively improve the flexibility of the installation and disassembly of the connector 130, thereby improving the installation efficiency of the prefabricated beam-slab connection structure 10.

[0112] In some implementations, at least a portion of the surface of the connector 130 is coated with a high-entropy alloy coating.

[0113] It should be understood that the high-entropy alloy coating refers to a metallic alloy containing at least four elements, which possesses excellent mechanical properties, corrosion resistance, and high-temperature performance. By applying the high-entropy alloy as a coating to the surface of the substrate material, the substrate material can be endowed with better corrosion resistance, high-temperature performance, and mechanical properties, while also extending the service life of the substrate material. It should also be understood that after the connector 130 is manufactured, the high-entropy alloy can be formed as a coating on the surface of the connector 130 through physical vapor deposition or thermal spraying processes. The high-entropy alloy can be prepared using processes such as melting and casting, powder metallurgy, additive manufacturing, and magnetron sputtering.

[0114] In this embodiment of the application, by coating at least a portion of the surface of the connector 130 with a high-entropy alloy coating, the structural strength, wear resistance and corrosion resistance of the connector 130 can be effectively improved, thereby improving the connection strength of the prefabricated beam-plate connection structure 10.

[0115] In some implementations, the composition of the high-entropy alloy coating includes at least one of the following: CoCrFeNiZr alloy, AlCoCrFeNiTi alloy, AlCoCrCuFeNi alloy, CoCrFeNiN alloy, FeCrMnNiMoN alloy, AlTiCrVFeMn alloy, and AlCrMoTiW alloy.

[0116] In some implementations, the prefabricated beam-plate connection structure 10 includes a plurality of first grooves 140 and a plurality of connectors 130, with each first groove 140 corresponding to a connector 130, and the first grooves 140 are arranged at equal intervals along the second direction.

[0117] It should be understood that, in the embodiments of this application, in the second direction, the distance between any two adjacent first grooves 140 among the plurality of first grooves 140 can be set according to actual needs. As an example, the embodiments of this application do not limit this.

[0118] In this embodiment of the application, by providing a plurality of first grooves 140 and a plurality of connectors 130 in the prefabricated beam-slab connection structure 10, and by having the first grooves 140 correspond one-to-one with the connectors 130, and by having the first grooves 140 arranged at equal intervals along the second direction, the connection strength of the prefabricated beam-slab connection structure 10 is effectively improved, and the installation efficiency of the prefabricated beam-slab connection structure 10 is enhanced.

[0119] In some implementations, such as Figure 4 and Figure 5 As shown, the dimension L1 of the connector 130 in the first direction satisfies: 250mm ≤ L1 ≤ 750mm. Exemplarily, the dimension L1 of the connector 130 in the first direction in this embodiment can be set to: 250mm, 300mm, 350mm, 400mm, 450mm, 500mm, 550mm, 600mm, 650mm, 700mm, 750mm, etc., or its value is within the range obtained by any combination of the above two values.

[0120] In some implementations, the dimension L1 of the connector 130 in the first direction satisfies: 500mm≤L1≤600mm.

[0121] In some implementations, such as Figure 4 and Figure 5 As shown, the dimension L2 of the first sub-extension 1321 in the first direction satisfies: 100mm ≤ L2 ≤ 200mm. Exemplarily, the dimension L2 of the first sub-extension 1321 in the first direction in this embodiment can be set to: 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, etc., or its value is within the range obtained by any combination of the above two values.

[0122] In some implementations, the dimension L2 of the first sub-extension 1321 in the first direction satisfies: 140mm≤L2≤160mm.

[0123] In some implementations, such as Figure 6As shown, the dimension L3 of the second sub-extension 1322 in the height direction of the precast beam 110 satisfies: 30mm ≤ L3 ≤ 60mm. Exemplarily, the dimension L3 of the second sub-extension 1322 in the height direction of the precast beam 110 in this embodiment can be set to: 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, etc., or its value can be within the range obtained by any combination of the above two values.

[0124] In some implementations, the dimension L3 of the second sub-extension 1322 in the height direction of the precast beam 110 satisfies: 40mm≤L3≤50mm.

[0125] Figure 15 A schematic diagram of the structure of the embedded part 170 provided in one embodiment of this application is shown. Figure 16 A cross-sectional schematic diagram of an embedded part 170 provided in another embodiment of this application is shown. Figure 17 A cross-sectional schematic diagram of an embedded part 170 provided in another embodiment of this application is shown. Figure 18 An exploded structural diagram of an embedded part 170 provided in another embodiment of this application is shown.

[0126] Figure 19 A cross-sectional schematic diagram of a prefabricated beam-slab connection structure 10 provided in an embodiment of this application is shown. Exemplarily, Figure 16 and Figure 17 Can be Figure 15 Schematic diagram of the cross-section of the embedded part 170 in different directions.

[0127] In some implementations, such as Figures 15 to 19 As shown, the prefabricated beam-slab connection structure 10 also includes an embedded part 170 and a first plate-shaped structure 180 extending along the second direction. The embedded part 170 includes a third sub-connecting part 171 and a fourth sub-connecting part 172 that are connected to each other. The third sub-connecting part 171 is embedded in the interior of the prefabricated slab 120. The fourth sub-connecting part 172 protrudes toward the first surface of the prefabricated slab 120 away from the connector 130. The first plate-shaped structure 180 is disposed on the side of the fourth sub-connecting part 172 near the prefabricated beam 110. The fourth sub-connecting part 172 is elastically connected to the first plate-shaped structure 180.

[0128] It should be understood that, in the embodiments of this application, the third sub-connecting part 171 and the fourth sub-connecting part 172 can be integrally formed or separately formed. When the third sub-connecting part 171 and the fourth sub-connecting part 172 are separately formed, they can be welded or snap-fitted together.

[0129] It should also be understood that during the manufacturing process of the precast slab 120, at least a portion of the embedded part 170 can be pre-embedded inside the precast slab 120 to facilitate subsequent hoisting. It should also be understood that the aforementioned embedded part 170 and the first plate-shaped structure 180 can be pre-embedded as a single integral structure inside the precast slab 120. Alternatively, the third sub-connecting portion 171 and the fourth sub-connecting portion 172 of the embedded part 170 can be pre-embedded inside the precast slab 120, with the first plate-shaped structure 180 disposed on the side wall of the precast beam 110, and an elastic connection between the embedded part 170 and the first plate-shaped structure 180 achieved during subsequent installation.

[0130] It should also be understood that a first sleeve 174 may be provided between the fourth sub-connecting part 172 and the first plate-shaped structure 180, so that the embedded part 170 and the first plate-shaped structure 180 can be elastically connected through the first sleeve 174. For example, an elastic structure 175 may be provided inside the first sleeve 174, and the elastic structure may be... Figure 18 The spring shown in the image.

[0131] In this embodiment, the third sub-connection portion 171 of the embedded part 170 is embedded inside the precast slab 120, and the fourth sub-connection portion 172 of the embedded part 170 protrudes toward the first surface 122 of the precast slab 120 away from the connector 130. The two sidewalls 113 of the precast beam 110 along the first direction are respectively provided with the first plate-like structure 180, and the fourth sub-connection portion 172 is elastically connected to the first plate-like structure 180. This serves to buffer pressure and deformation during the connection process between the precast beam 110 and the precast slab 120, reducing the risk of collision or compression between the precast beam 110 and the precast slab 120, thereby improving the stability of the connection between the precast beam 110 and the precast slab 120.

[0132] In some implementations, when the first plate-like structure 180 is disposed on the side wall 113, the first plate-like structure 180 and the side wall 113 are connected by one of the following connection methods: welding, adhesive bonding, or bolting. For example, the first plate-like structure 180 and the side wall 113 can be connected by bolts. Thus, in this embodiment, by connecting the first plate-like structure 180 and the side wall 113 by one of the following connection methods: welding, adhesive bonding, or bolting, the installation efficiency of the prefabricated beam-plate connection structure 10 is improved.

[0133] In some implementations, a buffer structure is provided between the third bottom wall 1111 of the first recess 111 near the first surface 122 and the first surface 122, where the first surface 122 is the surface of the precast plate 120 away from the connector 130.

[0134] It should be understood that, in the embodiments of this application, the materials of the buffer structure include, but are not limited to, the following materials: foam materials (e.g., polyurethane foam, polystyrene foam), rubber materials (e.g., nitrile rubber, silicone rubber), polymer composite materials, metal materials (e.g., aluminum alloy, titanium alloy), fiber composite materials, etc.

[0135] In this embodiment of the application, a buffer structure is provided between the third bottom wall 1111 near the first surface 122 of the first recess 111 and the first surface 122 to play a buffering role during the installation of the precast slab 120 and the precast beam 110, thereby reducing the risk of collision or squeezing between the precast beam 110 and the precast slab 120 and improving the stability of the connection between the precast beam 110 and the precast slab 120.

[0136] Figure 20 A cross-sectional schematic diagram of a prefabricated beam-slab connection structure 10 provided in another embodiment of this application is shown. Figure 21 A cross-sectional schematic diagram of a prefabricated beam-slab connection structure 10 provided in another embodiment of this application is shown. Figure 22 A schematic diagram of the overall structure of the second fixing structure 190 provided in an embodiment of this application is shown.

[0137] In some implementations, such as Figures 20 to 22 As shown, the prefabricated beam-slab connection structure 10 also includes a second fixing structure 190 extending along the second direction. The second fixing structure 190 is disposed on the side of the prefabricated slab 120 near the connector 130. The second fixing structure 190 includes a second plate-shaped structure 191 and an anchor 192. The second plate-shaped structure 191 is connected to the connector 130. One end of the anchor 192 is connected to the second plate-shaped structure 191, and the other end of the anchor 192 extends in a direction away from the connector 130. At least a portion of the anchor 192 is located inside the prefabricated slab 120.

[0138] It should be understood that, in the embodiments of this application, the second plate-shaped structure 191 can be fixedly connected to the connector 130 through the second sleeve 193. Exemplarily, during the manufacturing process of the precast slab 120, the second fixing structure 190 can be pre-embedded inside the precast slab 120. The surface of the second plate-shaped structure 191 away from the interior of the precast slab 120 can be provided with a second sleeve 193 protruding from the precast slab 120. At least a portion of the second sleeve 193 can be accommodated inside the first through hole of the connector 130, so that the second sleeve 193 can be fixedly connected to the connector 130. Specifically, when the connector also includes a first fixing structure 150, based on the above-mentioned fixed connection between the second sleeve 193 and the connector 130, the interior of the second sleeve 193 is provided with an internal thread corresponding to the bolt 152, and the bolt 152 can be threadedly connected to the second sleeve 193. Then, at least a portion of the second extension 1511 of the first fixing structure 150 is accommodated in the third groove 1521 of the bolt 152 to realize the connection between the first fixing structure 150 and the connector 130.

[0139] In this embodiment of the application, by providing a second fixing structure 190 extending along the second direction in the prefabricated beam-slab connection structure 10, the second fixing structure 190 includes a second plate-shaped structure 191 and an anchor 192. The second plate-shaped structure 191 is connected to the connector 130, one end of the anchor 192 is connected to the second plate-shaped structure 191, and the other end of the anchor 192 extends away from the connector 130. At least a portion of the anchor 192 is located inside the precast slab 120, which can effectively improve the connection strength between the connector 130 and the precast slab 120, while improving the tensile strength of the prefabricated beam-slab connection structure 10 and the connection strength between the precast slab 120 and the precast beam 110, thereby improving the connection strength of the prefabricated beam-slab connection structure 10.

[0140] Figure 23 An enlarged structural schematic diagram of a prefabricated beam-slab connection structure 10 provided in an embodiment of this application is shown. Exemplarily, this... Figure 23 Can be Figure 1 A partially enlarged schematic diagram of the prefabricated beam-slab connection structure 10.

[0141] In some implementations, such as Figure 23 As shown, the precast beam 110 includes a plurality of through slots 112 and a plurality of connectors 130. The through slots 112 and the connectors 130 correspond one-to-one. A second protrusion 114 between any two adjacent through slots 112 is provided with a fourth through hole 1141 that passes through the second protrusion 114 along the second direction. The fourth through hole 1141 is used to connect the plurality of connectors 130.

[0142] It should be understood that, in this embodiment, the shape of the fourth through hole 1141 can be matched with the shape of the second connecting rod 160, or the shape of the fourth through hole 1141 can also be matched with the shapes of the second through hole 1341 and the third through hole 1351. For example, on a plane perpendicular to the second direction, if the shape of the second connecting rod 160 is rectangular, the shape of the fourth through hole 1141 can be set to rectangular so that the second connecting rod 160 passes through the fourth through hole 1141. Also, for example, on a plane perpendicular to the second direction, the orthographic projection of the fourth through hole 1141 on that plane can be greater than or equal to the orthographic projection of the second through hole 1341 and the third through hole 1351. If the shapes of the second through hole 1341 and the third through hole 1351 are circular, the shape of the fourth through hole 1141 can be correspondingly set to circular. It should also be understood that the connection of multiple connectors 130 can be achieved by the second connecting rod 160 passing through the fourth through hole 1141.

[0143] In this embodiment of the application, multiple through slots 112 and multiple connectors 130 are provided in the precast beam 110. Each through slot 112 corresponds to a connector 130. A fourth through hole 1141 is provided in the second protrusion 114 between any two adjacent through slots 112, which extends through the second protrusion 114 along the second direction. The fourth through hole 1141 is used to connect multiple connectors 130, so as to facilitate the installation and disassembly of the connectors 130 and to facilitate the adjustment of the position of the connectors 130. This effectively improves the flexibility of the installation and disassembly of the connectors 130, thereby improving the installation efficiency of the prefabricated beam-slab connection structure 10.

[0144] See above again Figures 1 to 23As shown in the figure, this application provides an assembled beam-slab connection structure 10, which includes a precast beam 110, a precast slab 120, and a connector 130. The precast beam 110 has two opposite sidewalls 113 along a first direction, each having a first recess 111 extending along a second direction. The side of the precast slab 120 near the precast beam 110 is connected to the first recess 111. The precast beam 110 has at least one through groove 112 extending along the first direction at its end near the precast slab 120 along its height direction. The precast slab 120 has at least one second recess 121 extending along the first direction at its end near the precast beam 110. Two opposite second recesses... Part 121 communicates with the through groove 112 and forms a first groove 140. The first bottom wall 1211 of the second recess 121 is provided with a second groove 1212 with an opening facing the connector 130. The connector 130 includes a first main body 131 and a first extension 132. The first main body 131 extends along the first direction. The first extension 132 is connected to the end of the first main body 131 along the first direction and extends toward the first bottom wall 1211. The connector 130 is accommodated in the first groove 140. At least a portion of the first extension 132 is accommodated in the second groove 1212 to connect the precast beam 110 and the two precast slabs 120. The second direction is perpendicular to the first direction and parallel to the plane where the precast slab 120 is located. The connector 130 includes a plurality of first extensions 132, which are spaced apart along the second direction. Each first extension 132 includes a first sub-extension 1321 and a second sub-extension 1322 that are connected to each other. One end of the first sub-extension 1321 is connected to the first main body 131 and extends along the first direction away from the first main body 131. The second sub-extension 1322 extends along the height direction of the precast beam 110 and toward the precast slab 120. At least a portion of the second sub-extension 1322 is accommodated in the second groove 1212. The first main body 131 includes a first sub-connecting part 1311 and a second sub-connecting part 1312 that are connected to each other. The prefabricated beam-plate connection structure 10 also includes a first fixing structure 150, which is snapped into the first sub-connecting part 1311 and the second sub-connecting part 1312 to limit the displacement of the first sub-connecting part 1311 and the second sub-connecting part 1312 in the first direction.The first sub-connecting part 1311 and the second sub-connecting part 1312 are respectively provided with a first through hole 134 penetrating the first main body part 131 along the height direction of the precast beam 110. The first fixing structure 150 includes a first connecting rod 151 and a bolt 152. The bolt 152 is threadedly connected to the first through hole 134. The head of the bolt 152 is provided with a third groove 1521 with an opening away from the connector 130. The two ends of the first connecting rod 152 along the first direction are respectively provided with second extensions 1511. At least a portion of the second extensions 1511 is accommodated in the third groove 1521.

[0145] The above describes the prefabricated beam-slab connection structure 10 provided in the embodiments of this application. The following description is for illustrative purposes only and is intended to explain this application, and should not be construed as limiting it. Where specific techniques or conditions are not specified in the embodiments of this application, they shall be performed in accordance with the techniques or conditions described in the literature in this field or in accordance with the product manual.

[0146] In this embodiment, the prefabricated beam-slab connection structure 10 described in the above embodiments can be modeled and analyzed using finite element software (such as ANSYS) to simulate the equivalent stress distribution in different regions of the prefabricated beam-slab connection structure 10. During the software simulation, the parameters and values ​​used for the prefabricated beam-slab connection structure 10 in different simulation processes are the same, and the same working conditions and load conditions are maintained. The simulation is performed using the controlled single variable method.

[0147] Specifically, during the software simulation process, a geometric model needs to be created in the ANSYS software, and the material properties, loading conditions, and constraints need to be defined. Then, the created geometric model is meshed, that is, divided into multiple discrete small elements, such as triangles or rectangles as the smallest elements, to facilitate finite element analysis. Next, the corresponding analysis type is selected, such as static analysis or dynamic analysis, and the analysis parameters are set according to the specific situation. The solver is run to perform finite element analysis calculations to obtain the stress distribution in different regions of the geometric model. Post-processing is then performed, and the specific stress distribution in different regions of the geometric model can be analyzed by viewing stress contour plots or chart data.

[0148] In this application embodiment, in conjunction with the above embodiments, the following geometric models can be created for finite element analysis: Model 1, a geometric model of the prefabricated beam-slab connection structure 10 without the connector 130; Model 2, a geometric model of the prefabricated beam-slab connection structure 10 with the connector 130 in this application embodiment; Model 3, the connector 130 in this application embodiment; Model 4, a geometric model with a second fixing structure 190 below the connector 130 in Model 3; Model 5, a geometric model with a first fixing structure 150 above the connector 130 in Model 4. Figure 24 This paper shows a schematic diagram of the equivalent stress distribution in a finite element simulation of a prefabricated beam-slab connection structure 10 provided in an embodiment of this application. Figure 25 A schematic diagram of the equivalent stress distribution in a finite element simulation of a prefabricated beam-slab structure provided in another embodiment of this application is shown. Figure 24 The geometric model of the prefabricated beam-slab connection structure 10 shown in the figure does not include connectors 130. Figure 25 The geometric model of the prefabricated beam-slab connection structure 10 shown includes the connector 130 from the above embodiments. It should be understood that... Figure 24 The geometric model shown can be the first model mentioned above. Figure 25 The geometric model shown can be the second model mentioned above. Figure 26 The diagram shows a schematic representation of the distribution of equivalent stress in a finite element simulation of a connector 130 provided in an embodiment of this application. Figure 27 A schematic diagram of the equivalent stress distribution of a connector 130 provided in another embodiment of this application, based on a finite element simulation, is shown. Figure 28 A schematic diagram of the equivalent stress distribution from a finite element simulation of a connector 130 provided in another embodiment of this application is shown. It should be understood that... Figure 26 The geometric model shown can be model three mentioned above. Figure 27 The geometric model shown can be model four mentioned above. Figure 28 The geometric model shown can be the model five mentioned above.

[0149] In some implementations, during the finite element simulation process, for Figure 24 Model 1 shown in the image Figure 25 Model 2 shown in the image Figure 26 Model 3 shown in the figure Figure 27 Model 4 shown in the figure Figure 28 Model 5, as shown above, involves fixing the precast beam 110 in the aforementioned model. A tensile force of 1 kN is applied to each side of the precast slab 120 along its length. The equivalent stress distribution in different structural regions of different models is then analyzed sequentially. Secondly, refer to the above... Figures 1 to 28In the above model, the dimension of a single precast slab 120 along direction X can be set to 2000mm, the dimension of the top wall of the precast beam 110 along direction X can be set to 400mm, the dimension of the bottom wall of the precast beam 110 along direction X can be set to 600mm, that is, the dimension of the assembled beam-slab connection structure 10 along direction X is 4400mm, the dimension of the connector 130 along direction X can be set to 1100mm, the dimension of the first sub-extension 1321 of the connector 130 along direction X can be set to 150mm, the dimension of the first sub-extension 1321 along direction Y can be set to 30mm, the dimension of the first sub-extension 1321 along direction Z can be set to 20mm, and the distance between two adjacent first sub-extensions 1321 along direction Y is 30mm, and the dimension of the second sub-extension 1322 of the connector 130 along direction X is... The dimensions of the second sub-extension 1322 along the Y direction can be set to 30mm, and the dimensions of the second sub-extension 1322 along the Z direction can be set to 40mm. The dimensions of the first fixing structure 150 along the X direction can be set to 700mm, and the dimensions of the second extension 1511 along the X direction can be set to 5mm. The dimensions of the second plate-like structure 191 in the second fixing structure 190 along the X direction can be set to 100mm, and the dimensions of the second plate-like structure 191 along the Z direction can be set to 16mm. The diameter of the anchor 192 in the second fixing structure 190 can be set to 10mm, and the end of the anchor 192 away from the second plate-like structure 191 is further configured as an enlarged head. The diameter of the enlarged head can be set to 20mm, and the dimensions of the enlarged head along the Z direction can be set to 5mm. It should be understood that the above data are only examples, and those skilled in the art can set them according to the actual simulation process. As an example, the embodiments of this application do not limit this.

[0150] As above Figure 24 As shown, the connection area between the precast slab 120 and the precast beam 110 has a higher color brightness, exhibiting yellow and red hues. These yellow and red areas indicate that the stress in the precast beam-slab connection structure 10 is relatively concentrated at this location, and the maximum equivalent stress of the precast beam-slab connection structure 10 is 0.094025 MPa. Figure 25 As shown, the Figure 25 The prefabricated beam-slab connection structure 10 shown is equipped with connectors 130, resulting in fewer yellow and red areas in the structure, and no obvious red area appearing in the connection area between the precast slab 120 and the precast beam 110. Furthermore, the maximum equivalent stress of the prefabricated beam-slab connection structure 10 is 0.050599 MPa. Therefore, Figure 25 The prefabricated beam-slab connection structure 10 with connector 130 is compared to Figure 24The equivalent stress of the prefabricated beam-slab connection structure 10 without connector 130 was reduced by 46.19%, which effectively improved the connection performance between the prefabricated slab 120 and the prefabricated beam 110 in the prefabricated beam-slab connection structure 10, thereby improving the reliability of the prefabricated beam-slab connection structure 10.

[0151] like Figure 26 As shown, the maximum equivalent stress on the connector 130 is 0.20788 MPa. Figure 27 Below the connector 130 shown in the figure, a second fixing structure 190 as shown in the above embodiment is also provided. In this case, the maximum equivalent stress on the connector 130 is 0.14386 MPa, thereby, Figure 27 The connector 130 in the middle is compared to Figure 26 The equivalent stress of the connector 130 in the prefabricated beam-slab connection structure 10 was reduced by 30.8%, which improved the tensile properties of the connector 130 and thus improved the connection performance between the prefabricated slab 120 and the prefabricated beam 110.

[0152] Figure 28 The connector 130 shown in the figure is in Figure 27 Based on Model 4, a first fixing structure 150 as shown in the above embodiment is also provided above the connector 130. In this case, the maximum equivalent stress on the connector 130 is 0.12062 MPa, thus, Figure 28 The connector 130 in the middle is compared to Figure 26 The equivalent stress of the connector 130 in the prefabricated beam-slab connection structure 10 is reduced by 41.98%, which further improves the tensile properties of the connector 130 and effectively improves the connection performance between the prefabricated slab 120 and the prefabricated beam 110 in the prefabricated beam-slab connection structure 10.

[0153] Furthermore, to further illustrate the embodiments of this application, this application also performs theoretical calculations and analyses on the stress conditions of different structures in the prefabricated beam-slab connection structure 10 provided in the above embodiments. Compared with the prefabricated beam-slab connection structure 10 without the connector 130, the tensile bearing capacity of the prefabricated beam-slab connection structure 10 with the connector 130 in the above embodiments is analyzed and calculated. The embodiments described below are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0154] In this embodiment, the design basis for the stress calculation and analysis of the prefabricated beam-slab connection structure 10 refers to the Code for Design of Concrete Structures GB50010-2010, the Technical Specification for Post-Anchoring of Concrete Structures JGJ145-2013, and the Standard for Design of Steel Structures GB50017-2017. Specifically, the design parameters can be set as follows. It should be understood that the following parameters are exemplary and are not limited in this embodiment.

[0155] 1. Partial factor Y for permanent loads G It can be one of the following three: Y G (Risk control) = 1.5, Y G (Permanent) = 1.3, Y G (Earthquake) = 1.3, where the permanent load partial factor is a coefficient set according to different types of permanent loads and the nature of load action. It is used to consider the influence of various factors on permanent loads in actual engineering to ensure structural safety and reliability. The wind control factor is a coefficient set to consider the influence of wind loads on buildings or structures. In structural design, Y G (Wind Control) The wind control coefficient is used to adjust the magnitude of the design wind load to take into account factors such as wind uncertainty, structural response to wind load, and design requirements; Y G The (permanent) permanent coefficient is a coefficient set to consider the impact of permanent loads on buildings or structures. Permanent loads refer to the weight of the structure itself and permanent additional loads, such as the weight of walls, floors, beams, columns, etc. The seismic coefficient is a coefficient set to consider the impact of seismic loads on buildings or structures. Seismic loads refer to the horizontal seismic forces experienced by the structure under seismic action.

[0156] 2. Horizontal seismic partial factor Y Eh =1.3, the horizontal seismic partial factor is a factor set in structural design to consider the influence of horizontal seismic loads on buildings or structures.

[0157] 3. Wind vibration coefficient β z =1.7, the wind vibration coefficient is used to adjust the magnitude of the design wind load to take into account factors such as the uncertainty of wind, the structural response to wind load, and design requirements.

[0158] 4. Wind load shape coefficient μ s =0.01, this wind load shape coefficient is a coefficient set to take into account the influence of the geometry of a building or structure on its performance under wind load.

[0159] 5. Wind pressure height variation coefficient μ z =1, the wind pressure height variation coefficient is a coefficient used to take into account the degree of influence of the height of a building or structure on the wind pressure.

[0160] 6. Vertical seismic partial factor Y Ev =1.3, this vertical seismic partial factor is a coefficient set in the seismic design of building structures to consider the influence factors of the structure under vertical seismic action.

[0161] 7. Wind load partial factor Y W=1.4, this wind load partial factor is a coefficient set to consider the response of the structure under different wind loads.

[0162] 8. Wind load combination coefficient include (Persistent) = 0.6, (Earthquake) = 0.2. The wind load combination factor is a coefficient used in building structural design to account for the impact of different wind load combinations on the structure. (Persistent) is used to consider the effects of long-term sustained loads on a structure, including its own weight, service loads, and the effects of wind and seismic loads. (Earthquake) is used to consider the impact of different combinations of seismic loads and wind loads on the structure.

[0163] 9. The maximum seismic intensity of the seismic zone is set at 7 degrees, and the horizontal seismic influence coefficient α1 = 0.08. This horizontal seismic influence coefficient is a coefficient set in structural engineering design to consider the stress situation of different parts of the structure in the horizontal direction under seismic action. The horizontal seismic influence coefficient reflects the stress degree of different parts of the structure under seismic action and takes into account the differences in the seismic performance of the structure in the horizontal direction.

[0164] 10. The tensile strength of concrete can be I. h ×t h ×f c For example, the cross-sectional length I of the concrete slab h The cross-sectional thickness t of the concrete slab can be set to 1000mm. h The diameter can be set to 200mm, the number of connectors 130 (n) can be set to 5, and the concrete strength (f) can be set to... c It can be set to 1.71 N / mm 2 That is, the tensile strength of the concrete is 342kN.

[0165] In some implementations, the prefabricated beam-slab connection structure 10 is provided with the connector 130 shown in the above embodiments, and the design value V of the shear bearing capacity of the connector 130 is... k =f v ×s1, where f v The shear strength design value for the connector 130 is given by s1, where s1 is the cross-sectional area of ​​the first extension 132 of the connector 130. For example, as shown... Figure 4 and Figure 5 As shown, the dimension I1 of the first extension 132 of the connector 130 along the Y direction is 25 mm, and the dimension t of the first extension 132 of the connector 130 along the Z direction is 5 mm. That is, the cross-sectional area s1 of the first extension 132 of the connector 130 can be I1×t, which is 125 mm. 2The standard value of the shear strength f of the connector 130 v It can be set to 180MPa, which is the design value V of the shear bearing capacity of the connector 130. k It can be 22.5 kN. When the material of the connector 130 is steel, the ultimate tensile strength f of the steel is... uka The standard value (N) of the tensile bearing capacity of this steel under failure condition can be set to 470 MPa. Rk,s1 =f uka ×s1, or 58.75kN, is the partial factor γ for the tensile bearing capacity of this steel under failure conditions. Ms1 The design value N of the tensile bearing capacity of the steel under failure condition is set to 2.5. Rd,s1 =N Rk,s1 / γ Ms1 That is, 23.5 kN. In summary, by installing this connector 130 in the prefabricated beam-slab connection structure 10, the design value of the shear bearing capacity V that this connector 130 can provide is... k It is 22.5 kN, and the tensile bearing capacity it can provide is N. Rd,s1 It is 23.5kN.

[0166] In some implementations, as above Figure 18 As shown, the fourth sub-connecting part 172 is elastically connected to the first plate-shaped structure 180. A first sleeve 174 may be provided between the fourth sub-connecting part 172 and the first plate-shaped structure 180. An elastic structure 175 may be provided inside the first sleeve 174. This elastic structure may be... Figure 18 The spring shown in the image has a spring constant k = (G1 × d1) / (G1 × d1) 4 ) / (8Nc×D m 3 For example, the spring length I2 can be set to 200mm, the spring compression length x1 can be set to 100mm, the elastic modulus G1 of the spring steel can be set to 206000MPa, the spring wire diameter d1 can be set to 2mm, the spring average radius Dm can be set to 20mm, the number of spring coils Nc can be set to 15, and the spring constant k is 206N / m. The elastic potential energy of the spring is E = 1 / 2kx1 2 That is, 1.03 N·m, the number of springs n1 is 10, and the resistance value E of the spring is... 总=n1×E, i.e., 10.3kN. In summary, the spring provided between the fourth sub-connection 172 and the first plate structure 180 can provide 10.3kN of resistance to the precast beam 110 and precast slab 120 in the prefabricated beam-slab connection structure 10, so as to buffer pressure and deformation during the connection process of the precast beam 110 and precast slab 120, reduce the risk of collision or compression between the precast beam 110 and precast slab 120, and improve the stability of the connection between the precast beam 110 and precast slab 120.

[0167] In some implementations, as above Figure 7 As shown, a first fixing structure 150 can be provided in the prefabricated beam-slab connection structure 10. For example, the dimension d2 of the first fixing structure 150 along the Y direction is 10 mm, and the cross-sectional area s2 of the second extension 1511 in the first fixing structure 150 perpendicular to the Z direction is 100 mm². 2 The ultimate tensile strength f of the first fixed structure 150 stk The resistance standard value N of the first fixed structure 150 can be set to 540MPa. Rk,s2 =f stk / s2, or 54kN, the safety factor γ of the first fixed structure is 150. Ms2 The value is set to 2.5, the number n2 of the first fixing structure 150 is set to 1, and the resistance design value N of the first fixing structure 150 is set to 1. Rd2,s2 =(N Rk,s2 / γ Ms2 )×n, which is 21.6kN. In summary, each first fixed structure 150 can provide a tensile bearing capacity of 21.6kN. In actual use, multiple first fixed structures 150 can be set according to actual needs to meet the tensile performance of the prefabricated beam-slab connection structure 10.

[0168] In summary, the total tensile strength additionally provided by the connector 130 with the first fixing structure 150 to the prefabricated beam-slab connection structure 10 can be n×(V). k +N Rd,s2 =5×(22.5kN+21.6kN)=220.5kN. Compared with the tensile strength of 342kN under concrete pouring in the prefabricated beam-slab connection structure 10 without connector 130, connector 130 with first fixing structure 150 can provide a 64% gain in tensile strength, so as to significantly improve the stability of the connection between the prefabricated beam 110 and the prefabricated slab 120.

[0169] In some implementations, such as Figures 20 to 22As shown, the prefabricated beam-slab connection structure 10 also includes a second fixing structure 190 extending along the second direction. The second fixing structure 190 is disposed on the side of the prefabricated slab 120 near the connector 130. The second fixing structure 190 includes a second plate-shaped structure 191 and an anchor 192. The second plate-shaped structure 191 is connected to the connector 130, one end of the anchor 192 is connected to the second plate-shaped structure 191, and the other end of the anchor 192 extends in a direction away from the connector 130. At least a portion of the anchor 192 is located inside the precast slab 120. The second plate-shaped structure 191 can be fixedly connected to the connector 130 through the second sleeve 193. At least a portion of the second sleeve 193 can be accommodated inside the first through hole of the connector 130 to achieve a fixed connection between the second sleeve 193 and the connector 130. The interior of the second sleeve 193 is provided with an internal thread corresponding to the bolt 152, and the bolt 152 can be threadedly connected to the second sleeve 193.

[0170] For example, the diameter d3 of the bolt 152 is 10mm, that is, the cross-sectional area S3 of the bolt 152 is π×d3. 2 / 2, which is 78.5mm 2 The material of the second fixing structure 190 can be steel, and the ultimate tensile strength f of the second fixing structure 190 is... ukb =800MPa, the standard value of the tensile bearing capacity of the second fixed structure 190 at the point of failure is N. Rk,s3 =f ukb / S3, i.e., 62.8kN, the partial factor γ of the tensile bearing capacity of the second fixed structure 190 at the point of failure. Ms3 It can be set to 2.5, so that the second fixed structure 190 is at the design value N of the tensile bearing capacity at failure. Rd3,s3 =N Rk,s3 / γ Ms3 That is, 25.12kN. In summary, if the second fixing structure 190 is embedded in the precast slab 120, the structure of the second fixing structure 190 will be destroyed if the tensile bearing capacity it is subjected to is greater than or equal to 25.12kN.

[0171] In some implementations, the standard value N of the tensile bearing capacity at which the ideal concrete cone fails is... 0 Rk,c =k1×f ck 0.5 ×h ef 1.5 Among them, the cracking coefficient k of the concrete used in the precast slab 120 cr,N It can be set to 7.7, which is the uncracking coefficient k of the concrete applied in the precast slab 120. ucr,NThe coefficient k1 can be set to 11, and the standard value of the compressive strength f of this concrete can be set to 11. ck The effective anchorage depth h in the concrete can be set to 26800 kPa. ef It can be set to 0.14m. In this case, the standard value N of the tensile bearing capacity at which the ideal concrete cone fails is... 0 Rk,c It is 94.33 kN.

[0172] Secondly, the projected area A of the ideal concrete cone that is destroyed. 0 c,N =S cr,N ×S cr,N =9h ef 2 That is, 0.18m 2 The characteristic edge distance C of anchor 192 cr,N =1.5h ef That is, 0.21m; the critical edge distance S of the tensile bearing capacity of the anchor 192 cr,N =2C cr,N That is, 0.42m; the actual projected area A of the concrete cone that was destroyed. c,N = (C1 + S4 + 0.5 × S) cr,N )×(C2+S5+0.5×S cr,N In this case, the directional edge distance C1 is set to 0.21m, the directional edge distance C2 is set to 0.1m, and the directional spacings S4 and S5 are set to 0m. The actual projected area A of the concrete cone that is destroyed under these conditions is... c,N It is 0.13m 2 .

[0173] In some implementations, the influence coefficient of edge distance on tensile bearing capacity Wherein, the minimum side distance C min It can be set to 0.1m, which is the influence coefficient of this edge distance on the tensile bearing capacity. The influence coefficient of load eccentricity on tensile bearing capacity is 0.84. Wherein, the eccentricity e N It can be set to 0m, which is the influence coefficient of the load eccentricity on the tensile bearing capacity. The value is 1. This represents the standard value of the tensile bearing capacity at failure of the concrete cone. Among them, the influence coefficient of reinforcement on tensile bearing capacity It can be set to 1, which is the influence coefficient of bending moment on tensile bearing capacity. It can be set to 1, which is the influence coefficient of load eccentricity on tensile bearing capacity. It can be set to 1, which is the standard value N of the tensile bearing capacity at which the concrete cone fails. Rk,c It can be 58.68 kN. Specifically, the design value of the tensile bearing capacity (N) of the concrete cone at failure is... Rd,c =N Rk,c / γ Mc Among them, the design value N of the tensile bearing capacity of the concrete cone when it fails. Rd,c The tensile strength is 39.12 kN. In summary, when the anchor 192 in the second fixing structure 190 is anchored in the concrete of the precast slab 120, the concrete cone will be destroyed if the tensile bearing capacity is greater than or equal to 39.12 kN.

[0174] In some implementations, the area A of the load-bearing region of the anchor head of the anchor 192 in the concrete of the second fixing structure 190 in the precast slab 120 is... h =4 / π(d h 2 -d a 2 ), where the anchor bolt diameter d of anchor bolt 192 is... a The diameter d of the head of the anchor 192 at the end furthest from the second plate-like structure 191 is 0.01m. h The value is 0.02m, which is the area A of the load-bearing region of the anchor head of the anchor 192 in the concrete of the precast slab 120 in the second fixing structure 190. h It is 0.000225m 2 The anchor 192 was pulled out, exceeding the standard value of the tensile bearing capacity (N) of the concrete. Rk,p =f ck ×A h ×k2, where f is the standard value of the compressive strength of concrete. ck The value can be set to 26800 kN, and the correlation coefficient k2 is set to 10.5, which is the standard value of the tensile bearing capacity (N) of the concrete that the anchor 192 is pulled out and fails. Rk,p The value is 63.32 kN. Specifically, the anchor 192 is pulled out to the design value of the tensile bearing capacity N of the damaged concrete. Rd,p =N Rk,p / γ Mc The partial factor for the tensile bearing capacity of the concrete damaged by the pull-out of anchor 192 is 1.5, which is the design value N of the tensile bearing capacity of the concrete damaged by the pull-out of anchor 192. Rd,pThe tensile strength is 42.21 kN. In summary, when the anchor 192 in the second fixing structure 190 is anchored in the concrete of the precast slab 120, the anchor 192 will be damaged during pull-out if the tensile bearing capacity is greater than or equal to 42.21 kN. Therefore, by providing the second fixing structure 190 below the connector 130, the tensile bearing capacity of the precast beam-slab connection structure 10 can be improved, thereby significantly enhancing the stability of the connection between the precast beam 110 and the precast slab 120.

[0175] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A prefabricated beam-slab connection structure, characterized in that, include: Precast beams, precast slabs, and connectors; The precast beam has two opposite sidewalls along a first direction, each with a first recess extending along a second direction. The side of the precast slab closest to the precast beam is connected to the first recess. The precast beam has at least one through groove extending in a first direction near the end of the precast slab along the height direction of the precast beam, and the precast slab has at least one second recess extending in the first direction near the end of the precast beam. Two second recesses opposite each other in the first direction communicate with the through groove and form a first groove. The first bottom wall of the second recess is provided with a second groove with an opening facing the connector. The connector includes a first main body and a first extension. The first main body extends along a first direction. The first extension is connected to the end of the first main body along the first direction and extends towards the first bottom wall. The connector is accommodated in the first groove. At least part of the first extension is accommodated in the second groove to connect the precast beam and the two precast slabs. The second direction is perpendicular to the first direction and parallel to the plane where the precast slabs are located. The connector includes a plurality of first extensions, which are spaced apart along a second direction. The first extension includes a first sub-extension and a second sub-extension that are connected to each other. One end of the first sub-extension is connected to the first main body and extends in a direction away from the first main body along a first direction. The second sub-extension extends along the height direction of the precast beam and toward the precast slab. At least a portion of the second sub-extension is accommodated in the second groove. The first main body includes a first sub-connecting part and a second sub-connecting part that are interconnected. The prefabricated beam-slab connection structure also includes a first fixing structure, which is snapped into the first sub-connecting part and the second sub-connecting part to limit the displacement of the first sub-connecting part and the second sub-connecting part in the first direction. The first sub-connecting part and the second sub-connecting part are respectively provided with a first through hole penetrating the first main body part along the height direction of the precast beam. The first fixing structure includes a first connecting rod and a bolt. The bolt is threadedly connected to the first through hole. The head of the bolt is provided with a third groove with an opening away from the connector. The two ends of the first connecting rod along the first direction are respectively provided with a second extension. The prefabricated beam-slab connection structure also includes a second fixing structure extending along a second direction. The second fixing structure is disposed on the side of the prefabricated slab near the connector. The second fixing structure includes a second plate-shaped structure and an anchor. The second plate-shaped structure is connected to the connector. One end of the anchor is connected to the second plate-shaped structure, and the other end of the anchor extends away from the connector. At least a portion of the anchor is located inside the prefabricated slab. The surface of the second plate-shaped structure away from the interior of the prefabricated slab is provided with a second sleeve protruding from the prefabricated slab. The bolt is threadedly connected to the second sleeve. At least a portion of the second extension is accommodated in a third groove.

2. The prefabricated beam-slab connection structure according to claim 1, characterized in that, The first sub-connecting part and the second sub-connecting part are rotatably connected about the second direction.

3. The prefabricated beam-slab connection structure according to claim 2, characterized in that, The first sub-connector has a third recessed portion at its end near the second sub-connector, and the second sub-connector has a first protruding portion at its end near the first sub-connector. The third recessed portion and the first protruding portion are engaged and connected. The third concave portion is provided with two second through holes that extend along the second direction, and the first protruding portion is provided with a third through hole that extends along the second direction. The second through holes and the third through holes are connected.

4. The prefabricated beam-slab connection structure according to claim 3, characterized in that, The prefabricated beam-slab connection structure also includes a second connecting rod, which passes through two second through holes and a third through hole in sequence along the second direction and penetrates the connector.

5. The prefabricated beam-slab connection structure according to claim 4, characterized in that, The third concave portion and the first protruding portion form a sleeve structure extending along the second direction, and a rolling bearing is installed inside the sleeve structure.

6. The prefabricated beam-slab connection structure according to claim 1, characterized in that, The connector is a telescopic structure, which is used to adjust the size of the connector in the first direction.

7. The prefabricated beam-slab connection structure according to claim 1, characterized in that, At least a portion of the surface of the connector is coated with a high-entropy alloy coating.

8. The prefabricated beam-slab connection structure according to claim 7, characterized in that, The composition of the high-entropy alloy coating includes at least one of the following: CoCrFeNiZr alloy, AlCoCrFeNiTi alloy, AlCoCrCuFeNi alloy, CoCrFeNiN alloy, FeCrMnNiMoN alloy, AlTiCrVFeMn alloy, and AlCrMoTiW alloy.

9. The prefabricated beam-slab connection structure according to claim 1, characterized in that, The prefabricated beam-slab connection structure includes multiple first grooves and multiple connectors. The first grooves correspond one-to-one with the connectors, and the first grooves are arranged at equal intervals along the second direction.

10. The prefabricated beam-slab connection structure according to claim 1, characterized in that, The dimension L1 of the connector in the first direction satisfies: 250mm≤L1≤750mm.

11. The prefabricated beam-slab connection structure according to claim 1, characterized in that, The dimension L2 of the first sub-extension in the first direction satisfies: 100mm≤L2≤200mm.

12. The prefabricated beam-slab connection structure according to claim 1, characterized in that, The dimension L3 of the second sub-extension in the height direction of the precast beam satisfies: 30mm≤L3≤60mm.

13. The prefabricated beam-slab connection structure according to any one of claims 1 to 12, characterized in that, The prefabricated beam-slab connection structure also includes an embedded part extending along the second direction and a first plate-shaped structure. The embedded part includes a third sub-connecting part and a fourth sub-connecting part that are connected to each other. The third sub-connecting part is embedded in the interior of the precast slab, and the fourth sub-connecting part protrudes toward the first surface of the precast slab away from the connecting part. The first plate-shaped structure is located on the side of the fourth sub-connecting part that is close to the precast beam, and the fourth sub-connecting part is elastically connected to the first plate-shaped structure.

14. The prefabricated beam-slab connection structure according to claim 13, characterized in that, When the first plate-like structure is provided on the side wall, the first plate-like structure and the side wall are connected by one of the following connection methods: welding connection, adhesive connection, bolt connection.

15. The prefabricated beam-slab connection structure according to any one of claims 1 to 12, characterized in that, A buffer structure is provided between the third bottom wall of the first recess near the first surface and the first surface, and the first surface is the surface of the precast plate away from the connector.

16. The prefabricated beam-slab connection structure according to any one of claims 1 to 12, characterized in that, The precast beam includes multiple through slots and multiple connectors. Each through slot corresponds to a connector. A fourth through hole is provided in the second protrusion between any two adjacent through slots, which is used to connect multiple connectors.

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