Engaging connection structure and assembling method for precast concrete self-centering beam-column joints

Abstract

The present invention discloses an assembled concrete self-resetting beam-column node meshing connection structure and assembly method. The structure comprises: inserting a prestressed tendon into a precast reinforced concrete upper column, one end of which is anchored to an upper section perforated steel plate at the lower end surface of the upper column and the other end is anchored to the upper end of the upper column; placing a precast reinforced concrete beam horizontally on a precast reinforced concrete lower column; inserting a prestressed tendon into the precast reinforced concrete lower column, one end of which passes through the precast reinforced concrete beam and is anchored to an upper section slotted steel plate and the other end is anchored to the lower end of the lower column; the node core area of the precast reinforced concrete beam and the precast reinforced concrete lower column is cast in situ; the upper section perforated steel plate is provided with a bolt hole; the lower section slotted steel plate is provided with a slot, a connecting block is placed in the slot, and a preload spring is placed between the connecting block and the slot; a connecting pin is screwed into the bolt hole; and the connecting pin is meshed with the connecting block. The present invention realizes an assembled beam-column node connection structure with better connection effect and more convenient fixing method.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated concrete buildings, and in particular relates to a prefabricated concrete self-resetting beam-column node meshing connection structure and an assembly method. Background Art

[0002] Prefabricated buildings align with the development trends of the construction industry, which are focused on modernization, intelligence, and green development. Their main components (such as horizontal components like beams and slabs, vertical components like wall columns, and enclosure components like internal and external partitions) are prefabricated in factories and assembled on-site by pouring small amounts of concrete and welding steel structures. This significantly reduces on-site construction workload, shortens construction periods, and improves production efficiency.

[0003] However, the connection structure of prefabricated beam-column joints is currently not fully developed. Specifically, the longitudinal reinforcement in the columns of prefabricated beam-column joints is currently connected using grouting sleeves. The grouting quality is unstable and difficult to effectively detect. Moreover, the steel bar joints are all on the same cross-section, which does not meet the seismic design requirement that tensile steel bar joints should be staggered by 50%. This results in poor seismic performance, leading designers to be reluctant to use prefabricated beam-column joints, which to some extent hinders the development of prefabricated building structures. In addition, the hoisting, centering, positioning, and fixing of prefabricated columns are relatively complicated, which is also a major factor hindering the application of prefabricated frame structures.

[0004] Therefore, how to achieve prefabricated beam-column nodes with better connection effects and more convenient fixing methods is a technical problem that needs to be urgently solved in prefabricated frame structures. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides an assembled concrete self-resetting beam-column node meshing connection structure and an assembly method.

[0006] The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0007] An assembled concrete self-resetting beam-column node meshing connection structure, comprising: a precast reinforced concrete upper column, a precast reinforced concrete lower column, a precast reinforced concrete beam, an upper section of a perforated steel plate, and a lower section of a grooved steel plate;

[0008] Wherein, a plurality of upper column prestressed tendons are passed through the precast reinforced concrete upper column; one end of the upper column prestressed tendons is anchored to the upper section perforated steel plate at the lower end surface of the precast reinforced concrete upper column, and the other end is anchored to the upper end of the precast reinforced concrete upper column;

[0009] The precast reinforced concrete beam is placed horizontally on the precast reinforced concrete lower column;

[0010] A plurality of lower column prestressed tendons are passed through the precast reinforced concrete lower column; one end of the lower column prestressed tendon passes through the precast reinforced concrete beam and is anchored on the lower section grooved steel plate above the precast reinforced concrete beam, and the other end passes through and is anchored on the lower end of the precast reinforced concrete lower column;

[0011] The precast reinforced concrete beams and the precast reinforced concrete lower columns are cast in situ at the core area of the nodes;

[0012] The upper section of the perforated steel plate is also provided with a plurality of bolt holes; the lower section of the grooved steel plate is also provided with a plurality of slots; the plurality of bolt holes and the plurality of slots correspond one to one; a connecting block made of carbon steel is placed in the slot, and a pre-compression spring is placed between the connecting block and the side wall of the slot; a connecting pin is screwed into the bolt hole; and the connecting pin is engaged with the connecting block.

[0013] Optionally, the structure further comprises: a clamping clamp;

[0014] The clamp is fixed on the outer peripheral clamping openings of the upper section perforated steel plate and the lower section slotted steel plate by a plurality of high-strength hexagonal bolts to clamp the upper section perforated steel plate and the lower section slotted steel plate.

[0015] Optionally, the precast reinforced concrete upper column and the precast reinforced concrete lower column are both hollow reinforced concrete columns;

[0016] The assembled concrete self-resetting beam-column node meshing connection structure further comprises: a core column reinforcement cage;

[0017] The prefabricated reinforced concrete beam, the upper section perforated steel plate and the lower section grooved steel plate are all provided with holes for the core column reinforcement cage to pass through;

[0018] The core column reinforcement cage passes through the node core area longitudinally through the hole, and both ends extend into the hollow spaces of the precast reinforced concrete upper column and the precast reinforced concrete lower column respectively.

[0019] Optionally, a U-shaped steel bar is further provided in the core area of the node; the U-shaped steel bar and the beam stirrups in the core area of the node are tied together to enhance the bearing capacity of the core area of the node;

[0020] Wherein, the beam stirrups are stirrups used to tie the longitudinal reinforcement of the prefabricated reinforced concrete beam.

[0021] Optionally, the core column reinforcement cage includes a plurality of longitudinal reinforcement bars 5 in the cage and spiral ring reinforcements for binding the plurality of longitudinal reinforcement bars 5 in the cage.

[0022] Optionally, the multiple bolt holes are arranged around the holes on the upper section of the perforated steel plate, and the multiple slots are arranged around the holes on the lower section of the slotted steel plate.

[0023] Optionally, the upper column prestressed reinforcement holes and bolt holes on the upper section of the perforated steel plate are arranged at intervals;

[0024] The lower column prestressed reinforcement holes and the slots on the lower section grooved steel plate are arranged at intervals.

[0025] The present invention also provides a method for assembling a prefabricated concrete self-centering beam-column node meshing connection structure, which is used for on-site assembly of the prefabricated concrete self-centering beam-column node meshing connection structure; the prefabricated concrete self-centering beam-column node meshing connection structure comprises: a prefabricated reinforced concrete upper column, a prefabricated reinforced concrete lower column, a prefabricated reinforced concrete beam, an upper section of a perforated steel plate, and a lower section of a grooved steel plate;

[0026] 5. The upper section of the perforated steel plate is provided with a plurality of bolt holes; the lower section of the slotted steel plate is provided with a plurality of slots; the plurality of bolt holes and the plurality of slots correspond to each other; a connecting block made of carbon steel is placed in the slot, and a pre-compression spring is placed between the connecting block and the side wall of the slot; a connecting pin is screwed into the bolt hole; the precast reinforced concrete upper column and the upper section of the perforated steel plate are connected in a

[0027] The prefabrication stage in the factory is completed, and the assembly method includes: placing the upper section of the perforated steel plate at the lower end surface of the prefabricated reinforced concrete upper column; passing a plurality of upper column prestressed tendons through the prefabricated reinforced concrete upper column, anchoring one end of the upper column prestressed tendons to the upper section of the perforated steel plate, tensioning the upper column prestressed tendons, and anchoring the other end of the upper column prestressed tendons to the upper end of the prefabricated reinforced concrete upper column;

[0028] The assembly method comprises: 5. assembling the beam and the lower column: placing the precast reinforced concrete beam horizontally on the precast reinforced concrete lower column; placing the lower section of the grooved steel plate above the precast reinforced concrete beam; passing a plurality of upper column prestressed tendons through the precast reinforced concrete lower column, allowing one end of the lower column prestressed tendons to pass through the precast reinforced concrete beam and be anchored on the lower section of the grooved steel plate, tensioning the lower column prestressed tendons, and anchoring the other end of the lower column prestressed tendons to the lower end of the precast reinforced concrete lower column;

[0029] The core area of the node is equivalent to cast-in-place: concrete is poured in the core area of the node, and concrete is poured into the area between the lower section of the grooved steel plate and the precast reinforced concrete beam;

[0030] Assembling upper columns, beams and lower columns: hoisting the prefabricated reinforced concrete upper columns above the core area of the node; and engaging the connecting pins and the connecting blocks together in a one-to-one correspondence.

[0031] Optionally, after the step of assembling the upper column, the beam and the lower column, the assembly method further comprises:

[0032] Install the clamp clamp: use the clamp clamp to clamp the outer peripheral clamping openings of the upper section perforated steel plate and the lower section slotted steel plate, and use multiple high-strength hexagonal bolts to fix the clamp clamp to the upper section perforated steel plate and the lower section slotted steel plate.

[0033] Optionally, the precast reinforced concrete upper column and the precast reinforced concrete lower column are both hollow reinforced concrete columns; the precast reinforced concrete beam, the upper section perforated steel plate and the lower section grooved steel plate are all reserved with holes for the core column reinforcement cage to pass through;

[0034] After the step of assembling the beams and the lower columns, and before the step of casting the core area of the node in situ, the assembly method further comprises:

[0035] Hoisting the core column reinforcement cage: hoisting a core column reinforcement cage down to the core area of the node, and extending the lower end of the core column reinforcement cage into the hollow space of the precast reinforced concrete lower column through the holes on the lower grooved steel plate and the precast reinforced concrete beam;

[0036] The steps of assembling the upper column, beam and lower column specifically include:

[0037] The precast reinforced concrete upper column is hoisted above the core area of the node, and the upper end of the core column steel cage is extended into the hollow space of the precast reinforced concrete upper column through the hole of the upper section perforated steel plate; the connecting pin and the connecting block are engaged together one by one to connect the upper section perforated steel plate and the lower section grooved steel plate.

[0038] The prefabricated concrete self-resetting beam-column node meshing connection structure provided by the present invention utilizes prestressed tendons in the precast reinforced concrete upper and lower columns, resulting in columns with high bearing capacity and good ductility. Under strong earthquakes, the prestressed tendons dissipate seismic energy. When the columns reach their maximum controllable sliding position, the tendons maintain their elastic state, thereby exerting a self-resetting effect. This allows the precast concrete beams and columns to return to their initial state after the earthquake, ensuring the seismic performance of the entire structure. Furthermore, the present invention utilizes cast-in-place in the core area of the node, further ensuring the shear and bending bearing capacity of the beam-column node.

[0039] The present invention utilizes prestressed tendons to connect the precast reinforced concrete upper column to the upper section of the perforated steel plate, and to connect the lower section of the slotted steel plate, the precast reinforced concrete beam, and the precast reinforced concrete lower column. Thus, by engaging the connecting pin screwed into the upper section of the perforated steel plate with the connecting block in the slot of the lower section of the slotted steel plate, a mechanical meshing connection of the beam-column joint can be achieved. This simplifies construction, increases construction speed, significantly reduces the input of machinery and labor, and requires minimal technical expertise from workers, ensuring construction quality. Furthermore, when an earthquake strikes, force is transmitted through the connecting pin to the connecting block, and then to the prestressed spring. At this point, the prestressed spring can dissipate some of the earthquake energy. After the earthquake subsides, the elastic force of the prestressed spring can restore the column to its original state, achieving self-reset.

[0040] In summary, the prefabricated concrete self-resetting beam-column node meshing connection structure provided by the present invention is formed by prefabricating and assembling columns and beams and columns. It has high bearing capacity, safety and reliability, better connection effect, and more convenient fixing method. It can meet the higher assembly rate requirements of the main part of the frame structure, has strong engineering applicability, and has greatly promoted the development of the prefabricated industrialization of frame structures.

[0041] The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a three-dimensional diagram of an assembled concrete self-centering beam-column node meshing connection structure provided by an embodiment of the present invention;

[0043] Figure 2 1 is a cross-sectional view of an upper section of a perforated steel plate and a lower section of a grooved steel plate connected together in an embodiment of the present invention;

[0044] Figure 3 1 is a schematic diagram of the installation of the clamp clamp in an embodiment of the present invention;

[0045] FIG4( a ) is a top view of the upper section of the perforated steel plate in an embodiment of the present invention;

[0046] FIG4( b ) is a top view of the lower section of the grooved steel plate in an embodiment of the present invention;

[0047] Figure 5 This is a flow chart of an assembly method for a prefabricated concrete self-resetting beam-column node meshing connection structure provided by an embodiment of the present invention;

[0048] Figure 6 This is a flow chart of an assembly method for another assembled concrete self-resetting beam-column node meshing connection structure provided by an embodiment of the present invention;

[0049] Figure 7This is a flow chart of an assembly method for another prefabricated concrete self-resetting beam-column node meshing connection structure provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The present invention will be further described in detail below with reference to specific examples, but the embodiments of the present invention are not limited thereto.

[0051] The embodiment of the present invention provides a prefabricated concrete self-resetting beam-column node meshing connection structure, which realizes a safe, reliable and simple assembly prefabricated beam-column node dry connection. Figure 1 As shown, the structure includes: a precast reinforced concrete upper column 2, a precast reinforced concrete lower column 1, a precast reinforced concrete beam 3, an upper section of a perforated steel plate 5 and a lower section of a grooved steel plate 4.

[0052] Among them, multiple upper column prestressed tendons 201 are passed through the precast reinforced concrete upper column 2; one end of the upper column prestressed tendon 201 is anchored on the upper section perforated steel plate 5 at the lower end surface of the precast reinforced concrete upper column 2, and the other end is anchored on the upper end of the precast reinforced concrete upper column 2.

[0053] Here, the upper column prestressed tendons 201 are unbonded prestressed tendons, and the tendon body thereof is provided with an anti-corrosion isolation layer, and has excellent friction resistance and lubricity; the tendon body is tensioned and then anchored, so that prestress can be applied to the tendon body.

[0054] Specifically, the upper section of the perforated steel plate 5 can be provided with a hole 501 for the upper column prestressed tendon. One end of the upper column prestressed tendon 201 is anchored to the hole 501 of the upper section of the perforated steel plate 5. The tendon is then tensioned, and the other end is anchored to the upper end of the precast reinforced concrete upper column 2 using an anchor. Alternatively, the end of the upper column prestressed tendon hole 501 connected to the upper section of the perforated steel plate 5 can also be anchored using an anchor.

[0055] The precast reinforced concrete beam 3 is placed horizontally on the precast reinforced concrete lower column 1; a plurality of lower column prestressed tendons 101 are passed through the precast reinforced concrete lower column 1; one end of the lower column prestressed tendon 101 passes through the precast reinforced concrete beam 3 and is anchored on the lower section of the grooved steel plate 4 above the precast reinforced concrete beam 3, and the other end is anchored at the lower end of the precast reinforced concrete lower column 1.

[0056] Here, the lower column prestressed tendons 101 are also unbonded tendons. The lower section of the channeled steel plate 4 can also be provided with a lower column prestressed tendon hole 401. One end of the lower column prestressed tendon 101 is anchored to the lower column prestressed tendon hole 401 of the lower section of the channeled steel plate 4. The tendon is then tensioned, and the other end is anchored to the lower end of the precast reinforced concrete lower column 1 using an anchor. Alternatively, the end of the lower column prestressed tendon 101 connected to the lower section of the channeled steel plate 4 can also be anchored using an anchor.

[0057] The precast reinforced concrete beam 3 and the precast reinforced concrete lower column 1 are cast in situ in the core area of the node.

[0058] Alternatively, as Figure 1 As shown in , a U-shaped steel bar 7 can be provided in the core area of the node; the U-shaped steel bar 7 and the beam stirrups in the core area of the node are tied together to enhance the bearing capacity of the core area of the node; the beam stirrups are stirrups for tying the longitudinal bars 301 of the precast reinforced concrete beam 3.

[0059] It can be understood that when the core area of the node is cast in situ, the U-shaped steel bar 7 is cast together in the concrete structure of the core area of the node. This can enhance the shear and bending bearing capacity of the core area of the node, achieve the seismic performance goal of "strong node and weak component", and under the action of rare earthquakes, move the position of the plastic hinge outside the core area of the node, realizing a good plastic hinge mechanism.

[0060] like Figure 2 As shown, the upper section of the perforated steel plate 5 is also provided with a plurality of bolt holes 502; the lower section of the slotted steel plate 4 is also provided with a plurality of slots 504; the plurality of bolt holes 502 and the plurality of slots 504 correspond one to one; a connecting block 505 made of carbon steel is placed in the slot 504, and a preload spring 506 is placed between the connecting block 505 and the side wall of the slot 504; a connecting pin 503 is screwed into the bolt hole 502; the connecting pin 503 is engaged with the connecting block 505 to connect the upper section of the perforated steel plate 5 and the lower section of the slotted steel plate 4.

[0061] Specifically, a pin hole is provided at the center of the connecting block 505, and both the connecting pin 503 and the pin hole are provided with teeth protruding obliquely downward, so that the two can be meshed and connected after the connecting pin 503 enters the pin hole.

[0062] It is understood that the preload spring 506 placed between the connecting block 505 and the side wall of the slot 504 is primarily used to secure the connecting block 505. Furthermore, when an earthquake strikes, force is transmitted to the connecting block 505 via the connecting pin 503, and then to the preload spring 506. This dissipates some of the earthquake's energy, and after the earthquake subsides, the elastic force of the preload spring 506 restores the column to its original state.

[0063] In the prefabricated concrete self-resetting beam-column node meshing connection structure provided by the embodiment of the present invention, by using prestressed tendons in the precast reinforced concrete upper column 2 and the precast reinforced concrete lower column 1, the column body has the advantages of high bearing capacity and good ductility; under the action of a strong earthquake, the prestressed tendons play the role of dissipating seismic energy; when the column body reaches the controllable maximum sliding position, the prestressed tendons can still maintain an elastic state and thus play a self-resetting role, so that the precast concrete beam column can return to its initial state after the earthquake, ensuring the seismic performance of the entire structure. In addition, in the embodiment of the present invention, the core area of the node is equivalent to cast-in-place, further ensuring the shear and bending bearing capacity of the beam-column node.

[0064] In the embodiment of the present invention, prestressed tendons are used to connect the precast reinforced concrete upper column 2 with the upper section of the perforated steel plate 5, and to connect the lower section of the grooved steel plate 4, the precast reinforced concrete beam 3, and the precast reinforced concrete lower column 1. In this way, the connecting pin 503 screwed into the upper section of the perforated steel plate 5 is engaged with the connecting block 505 in the slot 504 of the lower section of the grooved steel plate 4, thereby realizing a mechanical meshing connection of the beam-column node. The construction is simple and the construction speed is faster, which greatly reduces the input of machinery and labor, does not require high technical level of workers, and ensures the construction quality. In addition, when an earthquake occurs, the force will be transmitted to the connecting block 505 through the connecting pin 503, and then to the prestressed spring 506. At this time, the prestressed spring 506 can dissipate part of the earthquake energy. After the earthquake disappears, the elastic force of the prestressed spring 506 can also restore the column to its original state, realizing self-reset.

[0065] In summary, the prefabricated concrete self-resetting beam-column node meshing connection structure provided by the present invention is formed by prefabricating and assembling columns and beams and columns. It has high bearing capacity, safety and reliability, better connection effect, and more convenient fixing method. It can meet the higher assembly rate requirements of the main part of the frame structure, has strong engineering applicability, and has greatly promoted the development of the prefabricated industrialization of frame structures.

[0066] Optionally, in one implementation, as Figure 3 As shown, the assembled concrete self-resetting beam-column node meshing connection structure provided by the embodiment of the present invention may further include: a clamp clip 403.

[0067] The clamp 403 is fixed to the outer peripheral clamping joints of the upper section perforated steel plate 5 and the lower section slotted steel plate 4 by multiple high-strength hexagonal bolts 404 to clamp the upper section perforated steel plate 5 and the lower section slotted steel plate 4, thereby strengthening the concrete disconnection point, so that the entire beam-column connection structure body and connection surface form a whole, which can bear stronger vertical and horizontal loads and eliminate weak surfaces, so that the beam-column structure can withstand stronger compressive, tensile and lateral forces.

[0068] Optionally, in one implementation, as in Figure 1 As shown in , the precast reinforced concrete upper column 2 and the precast reinforced concrete lower column 1 are both hollow reinforced concrete columns; the assembled concrete self-resetting beam-column node meshing connection structure provided by the embodiment of the present invention may also include: a core column steel cage 6.

[0069] For example, Figure 1 As shown in , the core column reinforcement cage 6 may include a plurality of longitudinal reinforcements in the cage and spiral ring reinforcements for binding the longitudinal reinforcements in the cage, but of course, it is not limited thereto.

[0070] Correspondingly, the precast reinforced concrete beam 3, the upper section perforated steel plate 5 and the lower section grooved steel plate 4 are all reserved with holes for the core column steel cage 6 to pass through; thus, the core column steel cage 6 passes through the core area of the node longitudinally, and the two ends extend into the hollow space of the precast reinforced concrete upper column 2 and the precast reinforced concrete lower column 1 through these holes respectively.

[0071] It is understandable that the light weight of hollow reinforced concrete columns can reduce the seismic effects to a certain extent, making the structure safer and more reliable; and hollow reinforced concrete columns can save concrete materials, have good cross-sectional expansion, and are easy to install, lift and transport, and save costs, meeting the development concept of green and energy-saving prefabricated buildings.

[0072] Preferably, in order to further enhance the shear and bending bearing capacity of the node core area, the core column reinforcement cage 6 and the U-shaped reinforcement 7 can be used simultaneously in the node core area.

[0073] Alternatively, in one implementation, based on the prefabricated concrete self-resetting beam-column node meshing connection structure including the core column reinforcement cage 6, as shown in Figures 4(a) and 4(b), the multiple bolt holes 502 on the upper perforated steel plate 5 can be arranged around the holes on the upper perforated steel plate 5, and the multiple slots 504 on the lower slotted steel plate 4 can be arranged around the holes on the lower slotted steel plate 4. This allows the contact surface of the upper perforated steel plate 5 and the lower slotted steel plate 4 to be evenly stressed, thereby improving the connection reliability of the upper and lower structures on the contact surface.

[0074] Furthermore, the upper column prestressed tendon holes 501 and bolt holes 502 on the upper perforated steel plate 5 can be spaced apart; similarly, the lower column prestressed tendon holes 401 and latching slots 504 on the lower slotted steel plate 4 can be spaced apart. This further improves the connection reliability of the upper and lower structures at the contact surface between the upper perforated steel plate 5 and the lower slotted steel plate 4.

[0075] In summary, the prefabricated concrete self-resetting beam-column node meshing connection structure provided by the embodiment of the present invention has many advantages such as better connection effect, more convenient fixing method, high bearing capacity, stability and reliability, etc., which has greatly promoted the development of the prefabricated industrialization of frame structures.

[0076] Corresponding to the above-mentioned prefabricated concrete self-resetting beam-column node meshing connection structure, the embodiment of the present invention also provides an assembly method of the structure, which is used for on-site assembly of the prefabricated concrete self-resetting beam-column node meshing connection structure; the prefabricated concrete self-resetting beam-column node meshing connection structure includes: a prefabricated reinforced concrete upper column 2, a prefabricated reinforced concrete lower column 1, a prefabricated reinforced concrete beam 3, an upper section perforated steel plate 5 and a lower section slotted steel plate 4; wherein, the upper section perforated steel plate 5 is provided with a plurality of bolt holes 502; the lower section slotted steel plate 4 is provided with a plurality of slots 504; the plurality of bolt holes 502 and the plurality of slots 504 correspond one to one; a carbon steel connecting block 505 is placed in the slot 504, and a preload spring 506 is placed between the connecting block 505 and the side wall of the slot 504; a connecting pin 503 is screwed into the bolt hole 502.

[0077] The prefabricated reinforced concrete upper column 2, the prefabricated reinforced concrete beam 3 and the prefabricated reinforced concrete lower column 1 are all prefabricated in the prefabrication stage at the factory.

[0078] The prefabrication process of the prefabricated reinforced concrete upper column 2 generally includes: tying the upper column reinforcement cage; supporting the formwork around the upper column reinforcement cage, reserving the upper column prestressed reinforcement holes in the column body, and then pouring concrete to obtain the prefabricated reinforced concrete upper column 2.

[0079] The prefabrication process of the prefabricated reinforced concrete lower column 1 generally includes: tying the lower column reinforcement cage; supporting the formwork around the lower column reinforcement cage, reserving the lower column prestressed reinforcement holes in the column body, and then pouring concrete to obtain the prefabricated reinforced concrete lower column 1.

[0080] The prefabrication process of the prefabricated reinforced concrete beam 3 generally includes: tying the beam reinforcement cage; supporting the formwork around the beam reinforcement cage; when supporting the formwork, reserving the node core area without pouring concrete, and pouring concrete in other areas to obtain the prefabricated reinforced concrete beam 3.

[0081] Moreover, the prefabricated reinforced concrete upper column 2 and the upper section perforated steel plate 5 are assembled during the prefabrication stage in the factory. The assembly method includes: placing the upper section perforated steel plate 5 at the lower end surface of the prefabricated reinforced concrete upper column 2; passing a plurality of upper column prestressed tendons through the prefabricated reinforced concrete upper column 2, anchoring one end of the upper column prestressed tendons on the upper section perforated steel plate 5, tensioning the upper column prestressed tendons, and anchoring the other end of the upper column prestressed tendons to the upper end of the prefabricated reinforced concrete upper column 2.

[0082] After the prefabrication stage is completed, on-site assembly can begin. Figure 5 As shown, the assembly method includes the following steps:

[0083] Precast beams and lower columns: Place the precast reinforced concrete beam 3 horizontally on the precast reinforced concrete lower column 1, and align the exposed steel bars with the precast reinforced concrete lower column 1 to form a node core area; place the lower section of the grooved steel plate 4 above the precast reinforced concrete beam 3; pass multiple lower column prestressed tendons 101 through the precast reinforced concrete lower column 1, so that one end of the lower column prestressed tendon 101 passes through the precast reinforced concrete beam 3 and is anchored on the lower section of the grooved steel plate 4, tension the lower column prestressed tendon 101, and anchor the other end of the lower column prestressed tendon 101 to the lower end of the precast reinforced concrete lower column 1.

[0084] The core area of the node is equivalent to cast-in-place: concrete is poured in the core area of the node, and the space between the lower section of the grooved steel plate 4 and the prefabricated reinforced concrete beam 3 is sealed by concrete pouring.

[0085] Assemble the upper column, beam and lower column: hoist the prefabricated reinforced concrete upper column 2 above the core area of the node; engage the connecting pin 503 and the connecting block 505 together one by one to connect the upper section of the perforated steel plate 5 and the lower section of the grooved steel plate 4.

[0086] Optionally, in one implementation, the precast reinforced concrete upper column 2 and the precast reinforced concrete lower column 1 are both hollow reinforced concrete columns, that is, space is reserved at the column core position for not pouring concrete when pouring concrete during the precast stage; the precast reinforced concrete beam 3, the upper section perforated steel plate 5 and the lower section grooved steel plate 4 all have reserved holes for the core column steel cage 6 to pass through.

[0087] At this time, see Figure 6 As shown, after the above-mentioned step of assembling the beams and the lower columns, and before the above-mentioned step of casting the core area of the node, the above-mentioned assembly method may further include:

[0088] Hoisting the core column reinforcement cage 6: hoist a core column reinforcement cage 6 down to the core area of the node, and allow the lower end of the core column reinforcement cage 6 to extend into the hollow space of the precast reinforced concrete lower column 1 through the holes on the lower section grooved steel plate 4 and the precast reinforced concrete beam 3.

[0089] Accordingly, the steps of assembling the upper column, beam and lower column specifically include:

[0090] The precast reinforced concrete upper column 2 is hoisted above the core area of the node, and the connecting pin 503 and the connecting block 505 are engaged together one by one; and the upper end of the core column steel cage 6 is extended into the hollow space of the precast reinforced concrete upper column 2 through the hole of the upper section perforated steel plate 5.

[0091] Further, such as Figure 7 As shown, after the steps of assembling the upper column, the beam and the lower column, the above-mentioned assembly method may further include:

[0092] Install the clamp clamp 403: Use the clamp clamp 403 to clamp the outer peripheral clamping joints of the upper section perforated steel plate 5 and the lower section slotted steel plate 4, and use multiple high-strength hexagonal bolts 404 to fix the clamp clamp 403 on the upper section perforated steel plate 5 and the lower section slotted steel plate 4.

[0093] It is understandable that the step of installing the clamp 403 can be applied to Figure 5 The assembly method shown can also be applied to Figure 6 The assembly method shown is Figure 7 Only Figure 6 Take this as an example.

[0094] It should be noted that, for the assembly method embodiment, since the structure involved is basically similar to the product embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiment.

[0095] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0096] In the description of this specification, the reference terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0097] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0098] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0099] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0100] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art can understand and implement other variations of the disclosed embodiments by viewing the drawings and the disclosed content.

[0101] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. An assembled concrete self-resetting beam-column node meshing connection structure, characterized in that: include: Precast reinforced concrete upper columns, precast reinforced concrete lower columns, precast reinforced concrete beams, upper section perforated steel plates and lower section grooved steel plates; Wherein, a plurality of upper column prestressed tendons are passed through the precast reinforced concrete upper column; one end of the upper column prestressed tendons is anchored to the upper section perforated steel plate at the lower end surface of the precast reinforced concrete upper column, and the other end is anchored to the upper end of the precast reinforced concrete upper column; The precast reinforced concrete beam is placed horizontally on the precast reinforced concrete lower column; A plurality of lower column prestressed tendons are passed through the precast reinforced concrete lower column; one end of the lower column prestressed tendon passes through the precast reinforced concrete beam and is anchored on the lower section grooved steel plate above the precast reinforced concrete beam, and the other end passes through and is anchored on the lower end of the precast reinforced concrete lower column; The precast reinforced concrete beams and the precast reinforced concrete lower columns are cast in situ at the core area of the nodes; The upper section of the perforated steel plate is further provided with a plurality of bolt holes; the lower section of the grooved steel plate is further provided with a plurality of slots; the plurality of bolt holes correspond to the plurality of slots one by one; a connecting block made of carbon steel is placed in the slot, and a pre-compression spring is placed between the connecting block and the side wall of the slot; a connecting pin is screwed into the bolt hole; and the connecting pin is engaged with the connecting block; The assembled concrete self-resetting beam-column node meshing connection structure further includes: a clamp; the clamp is fixed to the outer peripheral clamping openings of the upper section perforated steel plate and the lower section slotted steel plate by a plurality of high-strength hexagonal bolts to clamp the upper section perforated steel plate and the lower section slotted steel plate; The precast reinforced concrete upper column and the precast reinforced concrete lower column are both hollow reinforced concrete columns; the prefabricated concrete self-resetting beam-column node meshing connection structure also includes: a core column steel cage; the precast reinforced concrete beam, the upper section perforated steel plate and the lower section grooved steel plate are all reserved with holes for the core column steel cage to pass through; the core column steel cage passes through the node core area longitudinally through the holes, and its two ends extend into the hollow space of the precast reinforced concrete upper column and the precast reinforced concrete lower column respectively; the core column steel cage includes multiple longitudinal bars in the cage and spiral ring bars for binding the multiple longitudinal bars in the cage.

2. The assembled concrete self-resetting beam-column node meshing connection structure according to claim 1 is characterized in that: The core area of the node is further provided with a U-shaped steel bar; the U-shaped steel bar and the beam stirrups in the core area of the node are tied together to enhance the bearing capacity of the core area of the node; Wherein, the beam stirrups are stirrups used to tie the longitudinal reinforcement of the prefabricated reinforced concrete beam.

3. The assembled concrete self-resetting beam-column node meshing connection structure according to claim 1 is characterized in that: The multiple bolt holes are arranged around the holes on the upper section of the perforated steel plate, and the multiple slots are arranged around the holes on the lower section of the slotted steel plate.

4. The assembled concrete self-resetting beam-column node meshing connection structure according to claim 3 is characterized in that: The upper column prestressed tendon holes and bolt holes on the upper section of the perforated steel plate are arranged at intervals; the lower column prestressed tendon holes and the card slots on the lower section of the grooved steel plate are arranged at intervals.

5. A method for assembling a prefabricated concrete self-resetting beam-column node meshing connection structure, characterized in that: Used to realize the on-site assembly of the prefabricated concrete self-resetting beam-column node meshing connection structure described in claim 1; the prefabricated concrete self-resetting beam-column node meshing connection structure comprises: a prefabricated reinforced concrete upper column, a prefabricated reinforced concrete lower column, a prefabricated reinforced concrete beam, an upper section of a perforated steel plate, and a lower section of a grooved steel plate; Wherein, the upper section of the perforated steel plate is provided with a plurality of bolt holes; the lower section of the grooved steel plate is provided with a plurality of slots; the plurality of bolt holes and the plurality of slots correspond to each other one by one; a connecting block made of carbon steel is placed in the slot, and a prestressed spring is placed between the connecting block and the side wall of the slot; a connecting pin is screwed into the bolt hole; the precast reinforced concrete upper column and the upper section of the perforated steel plate are assembled during the prefabrication stage in the factory, and the assembly method includes: placing the upper section of the perforated steel plate at the lower end face of the precast reinforced concrete upper column; passing a plurality of upper column prestressed tendons through the precast reinforced concrete upper column, so that one end of the upper column prestressed tendons is anchored on the upper section of the perforated steel plate, tensioning the upper column prestressed tendons, and anchoring the other end of the upper column prestressed tendons on the upper end of the precast reinforced concrete upper column; The assembling method comprises: Assembling the beam and the lower column: placing the precast reinforced concrete beam horizontally on the precast reinforced concrete lower column; placing the lower section of the grooved steel plate above the precast reinforced concrete beam; passing a plurality of lower column prestressed tendons through the precast reinforced concrete lower column, allowing one end of the lower column prestressed tendons to pass through the precast reinforced concrete beam and be anchored on the lower section of the grooved steel plate, tensioning the lower column prestressed tendons, and anchoring the other end of the lower column prestressed tendons to the lower end of the precast reinforced concrete lower column; The core area of the node is equivalent to cast-in-place: concrete is poured in the core area of the node, and concrete is poured into the area between the lower section of the grooved steel plate and the precast reinforced concrete beam; Assembling upper columns, beams and lower columns: hoisting the prefabricated reinforced concrete upper columns above the core area of the node; and engaging the connecting pins and the connecting blocks together in a one-to-one correspondence.

6. The assembling method according to claim 5, characterized in that: After the step of assembling the upper column, the beam and the lower column, the assembly method further comprises: Install the clamp clamp: use the clamp clamp to clamp the outer peripheral clamping openings of the upper section perforated steel plate and the lower section slotted steel plate, and use multiple high-strength hexagonal bolts to fix the clamp clamp to the upper section perforated steel plate and the lower section slotted steel plate.

7. The assembling method according to claim 5, characterized in that: The precast reinforced concrete upper column and the precast reinforced concrete lower column are both hollow reinforced concrete columns; the precast reinforced concrete beam, the upper section perforated steel plate and the lower section grooved steel plate are all provided with holes for the core column reinforcement cage to pass through; After the step of assembling the beams and the lower columns, and before the step of casting the core area of the node in situ, the assembly method further comprises: Hoisting the core column reinforcement cage: hoisting a core column reinforcement cage down to the core area of the node, and extending the lower end of the core column reinforcement cage into the hollow space of the precast reinforced concrete lower column through the holes on the lower grooved steel plate and the precast reinforced concrete beam; The steps of assembling the upper column, beam and lower column specifically include: The precast reinforced concrete upper column is hoisted above the core area of the node, and the upper end of the core column steel cage is extended into the hollow space of the precast reinforced concrete upper column through the hole of the upper section perforated steel plate; the connecting pin and the connecting block are engaged together one by one to connect the upper section perforated steel plate and the lower section grooved steel plate.

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