Prestressed concrete ribbed beam single T plate, prestressed concrete ribbed beam single T plate group and superposed beam plate structure

Abstract

The utility model provides a prestressed concrete ribbed beam single-T plate, a prestressed concrete ribbed beam single-T plate group and a superposed beam-slab structure, and belongs to the field of fabricated buildings, the single-T plate comprises a ribbed beam and a panel, and at least a reinforcement cage, prestressed tendons and a pre-buried sleeve are arranged in the ribbed beam. Furthermore, the reinforcement cage comprises top ribs, bottom ribs and stirrups. The prestressed ribs are arranged between the bottom ribs and the top ribs along the beam length direction of the ribbed beams; the embedded sleeve is embedded in the end of the ribbed beam and located between the bottom rib and the top rib, and an additional shear resistant rib is assembled in the embedded sleeve. The ribbed beam is of a complete beam structure, and the reinforcement cage, the prestressed tendons and the pre-embedded sleeves are arranged in the ribbed beam, so that the structure of the ribbed beam is improved, and meanwhile, the tendons distributed at the two ends of the ribbed beam are staggered in a post-pouring space formed on the frame beam, and the safety and convenience of installation are achieved when the ribbed beam is opposite end to end.

Description

Technical Field

[0001] This utility model belongs to the field of prefabricated buildings, and in particular relates to a prestressed concrete ribbed beam single T-slab, a prestressed concrete ribbed beam single T-slab assembly, and a composite beam-slab structure. Background Technology

[0002] Double-T slab structures, as a new type of integrated slab-beam structure, have emerged and developed in the construction industry since the 1990s. They consist of a single precast concrete slab with a double-T cross-section, containing prestressed steel reinforcement, thus functioning as both a slab and a rib beam. This structural form boasts high integration and high bending stiffness, making it particularly suitable for multi-story or high-rise buildings with large spans. It effectively reduces structural weight, material usage, and construction volume, and is considered a key direction for lightweight building construction. In practical engineering, double-T slabs are precast floor slabs and then positioned using a hoisting system, quickly forming the building's load-bearing structural system.

[0003] However, as this new structure is applied in more projects, some problems and shortcomings have also been exposed. First, the vertical ribs of the double-T slab do not form a complete beam structure because they lack internal stirrups and other components, exhibiting only the characteristics of a unidirectional load-bearing plate beam with weak torsional stiffness. Second, the large-span double-T slab has a large self-weight, placing higher demands on tower cranes and construction systems, increasing construction difficulty. Therefore, large-span concrete ribbed single-T slabs have been developed and applied due to their complete beam structure and relatively lighter self-weight.

[0004] However, traditional concrete ribbed single T-slabs also have some drawbacks:

[0005] As recorded in the Sichuan Provincial Civil Engineering and Architectural Society standard T / SSACE010-2020 "Design Atlas of Prestressed Concrete T-shaped Slabs", the floor slab of a single T-slab is cantilevered on both sides and has a relatively small width (generally 1.2 meters), which limits the application scenarios of the single T-slab. In addition, the ends of the cantilevered slab are thickened, and it is not a flat plate but a slab with a variable cross section, which affects the aesthetics of the building. On the other hand, using a flat panel and increasing the span will result in cracking, which is not conducive to hoisting and transportation.

[0006] Chinese patent CN220768560U describes a rigid-joint single-T integrated precast beam-slab structure rib beam that does not consider the collision problem of the reinforcing bars of the relative rib beams, the shear resistance problem of the rib beam ends, or the installation and construction process problem.

[0007] It should be noted that the information disclosed in the background section of this utility model is intended only to enhance the understanding of the general background of this utility model, and should not be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0008] One objective of this utility model is to propose a single T-slab that has a large span, is easy to install, and has reinforcement.

[0009] The second objective of this utility model is to propose a single T-slab assembly that is large-span, easy to install and reinforce, for use in composite floor slab construction;

[0010] The third objective of this utility model is to propose a beam-slab structure composed of single T-plates;

[0011] To achieve one of the above objectives, this utility model first provides a prestressed concrete ribbed single T-slab, including ribbed beams and a panel, characterized in that at least the following are arranged within the ribbed beams:

[0012] A reinforcing cage, comprising top bars, bottom bars, and stirrups, wherein the top bars are staggered at their respective ends of the rib beam, and the bottom bars are staggered at their respective ends of the rib beam.

[0013] Prestressing tendons are arranged between the bottom reinforcement and the top reinforcement along the beam length direction of the rib beam;

[0014] An embedded sleeve is embedded at the end of the rib beam and located between the bottom reinforcement and the top reinforcement. Additional shear reinforcement is installed inside the embedded sleeve. The additional shear reinforcement is staggered at the protruding positions of the two ends of the rib beam.

[0015] Preferably, the panel has a plurality of connecting components at least near both sides, and the connecting components are implemented in at least one of the following ways:

[0016] Reinforcing ribs are provided between the connecting components along the width direction of the panel;

[0017] A connector is provided on the connector assembly for connecting adjacent prestressed concrete rib beam T-plates.

[0018] Preferably, the plurality of connecting components are defined as a panel edge connecting component near the side of the panel and a panel center connecting component located at the center line of the panel; the panel surface reinforcing rib is installed on the panel edge connecting component and the panel center connecting component; a connecting piece for connecting adjacent prestressed concrete rib beam single T-plates is provided on the panel edge connecting component.

[0019] Preferably, the connection assembly includes a mounting base and mounting bolts, the mounting base being fixed to the panel, and the mounting base having mounting holes for threaded mounting of the mounting bolts.

[0020] Preferably, the panel has multiple panel structural ribs;

[0021] The panel structural ribs extend along the width of the panel from near the top surface to near the bottom surface of the panel; or, the panel structural ribs are divided along the width of the panel into a first segment near the top surface of the panel, a second segment near the bottom surface or the middle of the panel, and a connecting segment connecting the first segment and the second segment.

[0022] Preferably, the rib beam is provided with a plurality of shear keys along the beam length direction, and the shear keys extend above the panel.

[0023] The technical effects achieved by the above-mentioned technical solution of this utility model are derived from one or more of the following combinations:

[0024] The rib beam is a complete beam structure. The internal steel cage, prestressed tendons and embedded sleeves improve the rib beam structure and form a post-cast space on the frame beam. The reinforcement bars are staggered to achieve the safety and convenience of installation.

[0025] This application, through the flexible application of connecting components, enables the realization of large-span flat plate structures. Practical experience has shown that at least two beam widths (mm) of 200 and 250 can be achieved, along with various combinations of plate widths (mm) of 1500 / 1800 / 2100 / 2400 / 2700. Therefore, it reduces the number of components requiring hoisting, improving hoisting efficiency; it reduces the number of ribbed beams, thereby reducing the oppressive feeling of dense ribs and improving the building's aesthetics; and it also allows for combinations of different plate widths, achieving flexible layout.

[0026] Compared to existing composite beams and slabs, additional shear reinforcement can be placed in the middle of the rib beam, so that the additional shear reinforcement will not fall off due to pull-out as in traditional technology, thereby improving shear performance.

[0027] Standardizing components enables the productization of components, saving costs.

[0028] To achieve the above two objectives, this utility model provides a prestressed concrete ribbed beam single T-slab assembly, characterized in that it includes multiple prestressed concrete ribbed beam single T-slabs; the connecting components between the prestressed concrete ribbed beam single T-slabs adjacent to each other on the side of the panel are connected by the connecting parts; the prestressed concrete ribbed beam single T-slabs opposite to each other at the ends of the ribs are erected on the main structure and form a post-cast space.

[0029] Preferably, the prestressed tendons are implemented as a non-reinforced structure.

[0030] The technical effects achieved by the above-mentioned technical solution of this utility model are derived from one or more of the following combinations:

[0031] This application, through the flexible application of connecting components, enables the realization of large-span flat plate structures. Practical experience has shown that at least two beam widths (mm) of 200 and 250 can be achieved, along with various combinations of plate widths (mm) of 1500 / 1800 / 2100 / 2400 / 2700. Therefore, it reduces the number of components requiring hoisting, improving hoisting efficiency; it reduces the number of ribbed beams, thereby reducing the oppressive feeling of dense ribs and improving the building's aesthetics; and it also allows for combinations of different plate widths, achieving flexible layout.

[0032] Adjacent single T-plates can be joined together using connecting components, which can achieve a tight fit or form a joint before pouring.

[0033] The rib beam is a complete beam structure. The internal steel cage, prestressed tendons and embedded sleeves improve the rib beam structure and form a post-cast space on the frame beam. The reinforcement bars are staggered to achieve the safety and convenience of installation.

[0034] Compared to existing composite beams and slabs, additional shear reinforcement can be placed in the middle of the rib beam, so that the additional shear reinforcement will not fall off due to pull-out as in traditional technology, thereby improving shear performance.

[0035] Standardizing components enables the productization of components, saving costs.

[0036] To achieve the above three objectives, this utility model provides a composite beam-slab structure, characterized in that it includes a prestressed concrete ribbed beam single T-slab assembly, on which a cast-in-place layer is poured.

[0037] Preferably, the prestressed concrete rib beams adjacent to each other on the side of the panel are closely joined, or post-cast joints are formed. Attached Figure Description

[0038] Figure 1 This diagram illustrates the structure of a prestressed concrete ribbed beam single T-slab.

[0039] Figure 2 This diagram illustrates the steel structure layout of a prestressed concrete ribbed beam single T-slab.

[0040] Figure 3 This is a front view of a prestressed concrete ribbed single T-slab.

[0041] Figure 4 This is a front view of a steel structure consisting of a prestressed concrete ribbed beam and a single T-slab.

[0042] Figure 5 This image shows a comparison of the positions of the reinforcing bars at both ends of a prestressed concrete ribbed single T-slab.

[0043] Figure 6The structural side view of the rib beam in a prestressed concrete rib beam single T-slab is shown.

[0044] Figure 7 This diagram illustrates the structure of a prestressed concrete ribbed beam single T-slab assembly.

[0045] Figure 8 The diagram illustrates the structure of the composite beam-slab structure.

[0046] The components include: 1. Rib beam; 11. Reinforcing cage; 111. Bottom reinforcement; 112. Top reinforcement; 113. Stirrups; 12. Prestressed tendons; 13. Embedded sleeves; 131. Additional shear reinforcement; 132. Embedded shear reinforcement; 14. Shear key; 2. Panel; 20. Joint; 21. Panel structural reinforcement; 211. First section; 212. Second section; 213. Connecting section; 3. Connecting components; 301. Mounting base; 302. Mounting bolts; 31. Panel edge connecting components; 32. Panel in-situ connecting components; 33. Panel surface reinforcing ribs; 34. Connecting parts; 4. Cast-in-place layer; 41. Crack-resistant reinforcement; 5. Frame beam; 6. Temporary formwork. Detailed Implementation

[0047] The following description is provided to enable those skilled in the art to implement and use the present invention and to incorporate it into specific application contexts. Various modifications and uses in different applications will be readily apparent to those skilled in the art, and the general principles defined herein are applicable to a wide range of embodiments. Therefore, the present invention is not limited to the embodiments given herein, but should be granted the broadest scope consistent with the principles and novel features disclosed herein.

[0048] In the following detailed description, numerous specific details are set forth to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that practice of the present invention is not necessarily limited to these specific details. In other words, well-known structures and devices are shown in block diagram form without detailed representation to avoid obscuring the present invention.

[0049] Readers should note all documents and references submitted concurrently with this specification and open to public inspection, the contents of which are incorporated herein by reference. Unless otherwise expressly stated, all features disclosed in this specification (including any appended claims, abstracts, and drawings) may be replaced by alternative features for the same, equivalent, or similar purposes. Therefore, unless explicitly stated otherwise, each disclosed feature is merely one example of a set of equivalent or similar features.

[0050] Note that, where used, the markings left, right, front, back, top, bottom, front, back, clockwise, and counterclockwise are merely for convenience and do not imply any specific fixed direction. In fact, they are used to reflect the relative position and / or orientation between different parts of an object. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this utility model, it should 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 mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] Note that, in practice, "further," "preferably," "even further," and "more preferably" are simply starting points for describing another embodiment based on the foregoing embodiments. The combination of the content following "further," "preferably," "even further," or "more preferably" with the foregoing embodiments constitutes the complete configuration of another embodiment. Any combination of several "further," "preferably," "even further," or "more preferably" settings following the same embodiment can form yet another embodiment.

[0053] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0054] Structural Example 1:

[0055] Please combine Figures 1-8 This embodiment provides a prestressed concrete ribbed single T-slab, including a ribbed beam 1 and a panel 2. The ribbed beam 1 contains structural reinforcement. For details, please refer to... Figure 5 , Figure 6 and Figure 8 The rib beam 1 contains at least a reinforcing cage 11, prestressing tendons 12, and embedded sleeves 13. Further, the reinforcing cage 11 includes top reinforcement 112, bottom reinforcement 111, and stirrups 113; the prestressing tendons 12 are arranged along the beam length of the rib beam 1 between the bottom reinforcement 111 and the top reinforcement 112; the embedded sleeves 13 are embedded at the ends of the rib beam 1 and located between the bottom reinforcement 111 and the top reinforcement 112, and additional shear reinforcement 131 is installed within the embedded sleeves 13. Further, one end of the embedded sleeve 13 is embedded within the rib beam 1 via embedded shear reinforcement 132, and the other end is exposed to form an installation end for the additional shear reinforcement 13, thus forming a three-section structure.

[0056] It should be noted that this embodiment uses a prestressed concrete ribbed single-T slab installed on frame beam 5 as the implementation scenario. Two prestressed concrete ribbed single-T slabs are hoisted onto frame beam 5, which can be implemented as a composite beam, i.e., the prestressed concrete ribbed single-T slabs are hoisted onto the precast part of frame beam 5. A post-cast space is formed between the two, which is also the post-cast part of frame beam 5. The ribs of the prestressed concrete ribbed single-T slabs form secondary beams through the post-cast space. Therefore, additional shear reinforcement with threads can be screwed into the embedded sleeve 13 to form a shear effect. Compared with the prior art where the embedded sleeve 13 is placed arbitrarily in composite beams or placed on the upper composite layer of the beam with the largest bending moment, the additional shear reinforcement at the point of maximum bending moment is subjected to tension, and the anchorage of the tensioned additional shear reinforcement with concrete is at risk of slippage, which is unsafe for shear deviation. In this embodiment, the embedded sleeve 13 can be set near the middle position of the rib 1, so that the position can be set in the middle or below the secondary beam.

[0057] Furthermore, to improve the stiffness of the post-cast portion of the composite beam, the bottom reinforcement bars 111, top reinforcement bars 112, and additional shear bars 131 on the rib beam 1 can be staggered horizontally or vertically. Therefore, when precasting prestressed concrete rib beam single T-slabs, the positions of the structural reinforcement at both ends of the prestressed concrete rib beam single T-slab can be designed in two ways, i.e., the structural reinforcement at both ends of the rib beam 1 can be designed with different outgoing reinforcement positions to meet this requirement. Please refer to [link / reference] for details. Figure 5 , Figure 5 This is a structural effect illustration, which compares two different reinforcement methods at both ends of the rib beam 1. The red marks indicate the reinforcement positions at one end of the rib beam 1, including the bottom reinforcement 111a, the top reinforcement 112a, and the embedded sleeve 13a; conversely, the bottom reinforcement 111b, the top reinforcement 112b, and the embedded sleeve 13b indicate the reinforcement positions at the other end of the rib beam 1.

[0058] Furthermore, the prestressing tendons 12 are intended to enhance the stiffness of the rib beam 1. Therefore, in this embodiment, they can be implemented as a non-reinforcing structure, that is, the prestressed concrete rib beam can be cast into a single T-plate and then cut off at the end.

[0059] In a preferred embodiment of this invention, the structural reinforcement in the rib beam 1, from bottom to top, consists of bottom reinforcement 111, prestressing reinforcement 12, additional shear reinforcement 131, and top reinforcement 112. The bottom reinforcement 111 and top reinforcement 112 are ordinary steel bars, protruding and avoiding the bottom reinforcement 111 on either side of the rib beam 1 at opposite positions; that is, the protruding positions of the bottom reinforcement 111 at both ends of the rib beam 1 are staggered (the two ends are bottom reinforcement 111a and top reinforcement 112b, respectively). Therefore, the two prestressed concrete rib beam T-slabs at opposite positions on the frame beam 5 are aligned end-to-end, achieving staggered reinforcement arrangement. Similarly, the additional shear reinforcement is installed through the pre-embedded sleeve 13, protruding and screwed in after the slab is hoisted, avoiding the bottom reinforcement 111 on either side of the rib beam 1 at opposite positions at opposite positions at different positions; the prestressing reinforcement 12 is not protruding, i.e., it is cut off after tensioning.

[0060] Furthermore, the panel 2 is provided with a plurality of connecting components 3 at least near both sides. The connecting components 3 are used in at least one of the following two structures: first, plate reinforcing ribs 33 are provided between the connecting components 3 along the width direction of the panel 2; second, connecting parts 34 for connecting adjacent prestressed concrete rib beam single T plates are provided on the connecting components 3.

[0061] First, please combine Figure 1 and Figure 2 In order to achieve the first and second structural purposes, there are multiple connecting components 3, which are arranged at intervals along the direction of beam length (or slab length). No restrictions are placed on the size of the intervals, which depend on the concrete properties, thickness, and bending capacity of the panel 2.

[0062] For further information, please refer to [link / reference]. Figure 3 and Figure 4 Multiple connecting components 3 are defined as edge connecting components 31 near the side of panel 2 and center connecting components 32 located at the centerline of panel 2; panel reinforcing ribs 33 are installed on the edge connecting components 31 and center connecting components 32; connecting parts 34 for connecting adjacent prestressed concrete rib beam single T-slabs are provided on the edge connecting components 31. The multiple connecting components 3 are defined separately here for easier description later. It should be noted that the center connecting components 32 and the edge connecting components 31 have the same structure but different positions on the panel.

[0063] For details, please refer to Figure 3The connecting component 3 includes a mounting base 301 and mounting bolts 302. The mounting base 301 is fixed to the panel 2 (in a steel structure arrangement, the mounting base 301 can be welded to the panel structural reinforcement). The mounting base 301 has mounting holes for the threaded mounting of the mounting bolts 302. Preferably, the mounting is a channel steel, with one side plate embedded and fixed to the panel 2, and the other side plate having mounting holes for the mounting bolts 302. It is worth mentioning that the choice of mounting base 301 in this embodiment is not limited to a channel steel structure; other steel structures, such as I-beams or Z-shaped steel, can also be used. The purpose is to provide a mounting base 301 that can be firmly embedded in the panel 2, so that the mounting bolts 302 can be used to install the connecting component 34 or the panel reinforcement rib 33. Furthermore, in this embodiment, both the connecting component 34 and the panel reinforcement rib 33 can be implemented as steel pipes, which are installed on the mounting base 301 through the holes by the mounting bolts 302. The plate reinforcing rib 33 is implemented as a relatively long steel pipe because it is in the same direction as the plate width span, while the connector 34 is used for splicing adjacent prestressed concrete rib beam single T plates, and is therefore implemented as a relatively short steel pipe; furthermore, both the long steel pipe and the short steel pipe are implemented as square steel pipes.

[0064] Specifically, on the same straight line, edge connecting components 31 are set at the sides of panel 2, and center connecting components 32 are set at the center of panel 2, thereby providing panel surface reinforcing ribs 33 on at least three connecting components 3. These are arranged in groups along the beam length (or panel length) to improve panel surface stiffness and increase the bending resistance of panel 2 during demolding, transportation and hoisting.

[0065] For further details, please refer to Figure 1 When a prestressed concrete ribbed beam single T-slab is used as the composite bottom slab of the floor slab, multiple shear keys 14 are provided on the ribbed beam 1 along the beam length direction, and the shear keys 14 extend above the panel 2. Specifically, the shear keys 14 are shear bars, which can be welded to the internal structural reinforcement (reinforcing cage 11) of the ribbed beam 1.

[0066] Panel 2 and rib beam 1 are integrally cast and formed, and multiple panel structural ribs 21 are provided in panel 2. Specifically, the panel structural ribs 21 are arranged in the width direction of the panel, from near the top surface of panel 2 to near the bottom surface of panel 2;

[0067] Alternatively, please see Figure 4The panel structural ribs 21 are divided along the width of the panel into a first segment 211 near the top surface of the panel 2, a second segment 212 near the bottom surface or middle of the panel 2, and a connecting segment 213 connecting the first segment 211 and the second segment 212. This embodiment is the optimal choice for this implementation. Compared with the prior art, the structural ribs in the panel 2 are all located at the top and are straight. In conjunction with the aforementioned panel reinforcing ribs 33, placing the mounting base 301 at the top of the panel 2 can increase the bending resistance of the panel during demolding, transportation, and hoisting. The panel structural ribs 21 extending downwards can increase the bending resistance of the bottom of the panel during normal use after the cast-in-place layer 4 is poured.

[0068] The beneficial effects of this embodiment:

[0069] Rib 1 is a complete beam structure. The internal steel cage 11, prestressed tendons 12 and embedded sleeves 13 improve the structure of rib 1. At the same time, they form a post-cast space on the frame beam 5, and the reinforcement bars are staggered to achieve the safety and convenience of installation.

[0070] This application, through the flexible application of connecting component 3, can realize large-span flat plate structures. Practical experience has shown that it can achieve at least two beam widths (mm) of 200 and 250, and various combinations of plate widths (mm) of 1500 / 1800 / 2100 / 2400 / 2700. Therefore, it can reduce the number of components to be hoisted, improving hoisting efficiency; reduce the number of rib beams by one, thereby reducing the architectural oppressive feeling caused by dense ribs and improving the building's aesthetics; and also allow for combinations of different plate widths, achieving flexible layout.

[0071] Compared to existing composite beams and slabs, the additional shear reinforcement 131 can be placed in the middle of the rib beam 1, so that the additional shear reinforcement 131 will not fall off due to pull-out as in traditional technology, thereby improving shear resistance.

[0072] Standardizing components enables the productization of components, saving costs.

[0073] Structural Example 2:

[0074] Please refer to Figure 7 , Figure 8 and combined Figures 1-6 This embodiment provides a prestressed concrete ribbed beam single T-slab assembly, including multiple prestressed concrete ribbed beam single T-slabs as described in Embodiment 1. Specifically, the connecting components 3 between adjacent prestressed concrete ribbed beam single T-slabs on the side of panel 2 are connected by connecting parts 34; the prestressed concrete ribbed beam single T-slabs opposite each other at the ends of rib beam 1 are erected on the main structure and form a post-cast space.

[0075] Taking the composite frame beam 5 as an example, a row of prestressed concrete ribbed beam single T-slabs is erected on both the left and right sides of the frame beam 5. Each row of adjacent prestressed concrete ribbed beam single T-slabs is connected by connectors 34 and connector components 3. The connection method is either close splicing or leaving a certain post-cast joint 20. Temporary formwork 6 is set up below the post-cast joint 20 to facilitate the pouring of the cast-in-place layer 4. A post-cast space is formed between the prestressed concrete ribbed beam single T-slabs on the left and right sides of the frame beam 5. Anti-cracking steel bars 41 are lapped on the post-cast space.

[0076] The prestressed concrete ribbed single T-slab includes a ribbed beam 1 and a panel 2. The panel 2 has multiple connecting components 3 near at least both sides. These connecting components 3 are used in at least one of two structural configurations: first, reinforcing ribs 33 are provided between the connecting components 3 along the width of the panel 2; second, connecting parts 34 are provided on the connecting components 3 for connecting adjacent prestressed concrete ribbed single T-slabs.

[0077] First, please combine Figure 1 and Figure 2 In order to achieve the first and second structural purposes, there are multiple connecting components 3, which are arranged at intervals along the direction of beam length (or slab length). No restrictions are placed on the size of the intervals, which depend on the concrete properties, thickness, and bending capacity of the panel 2.

[0078] For further information, please refer to [link / reference]. Figure 3 and Figure 4 Multiple connecting components 3 are defined as edge connecting components 31 near the side of panel 2 and center connecting components 32 located at the centerline of panel 2; panel reinforcing ribs 33 are installed on the edge connecting components 31 and center connecting components 32; connecting parts 34 for connecting adjacent prestressed concrete rib beam single T-slabs are provided on the edge connecting components 31. The multiple connecting components 3 are defined separately here for easier description later. It should be noted that the center connecting components 32 and the edge connecting components 31 have the same structure but different positions on the panel.

[0079] For details, please refer to Figure 3The connecting component 3 includes a mounting base 301 and mounting bolts 302. The mounting base 301 is fixed to the panel 2 (in a steel structure arrangement, the mounting base 301 can be welded to the panel structural reinforcement). The mounting base 301 has mounting holes for the threaded mounting of the mounting bolts 302. Preferably, the mounting is a channel steel, with one side plate embedded and fixed to the panel 2, and the other side plate having mounting holes for the mounting bolts 302. It is worth mentioning that the choice of mounting base 301 in this embodiment is not limited to a channel steel structure; other steel structures, such as I-beams or Z-shaped steel, can also be used. The purpose is to provide a mounting base 301 that can be firmly embedded in the panel 2, so that the mounting bolts 302 can be used to install the connecting component 34 or the panel reinforcement rib 33. Furthermore, in this embodiment, both the connecting component 34 and the panel reinforcement rib 33 can be implemented as steel pipes, which are installed on the mounting base 301 through the holes by the mounting bolts 302. The plate reinforcing rib 33 is implemented as a relatively long steel pipe because it is in the same direction as the plate width span, while the connector 34 is used for splicing adjacent prestressed concrete rib beam single T plates, and is therefore implemented as a relatively short steel pipe; furthermore, both the long steel pipe and the short steel pipe are implemented as square steel pipes.

[0080] Specifically, on the same straight line, edge connecting components 31 are set at the sides of panel 2, and center connecting components 32 are set at the center of panel 2, thereby providing panel surface reinforcing ribs 33 on at least three connecting components 3. These are arranged in groups along the beam length (or panel length) to improve panel surface stiffness and increase the bending resistance of panel 2 during demolding, transportation and hoisting.

[0081] For further details, please refer to Figure 1 When a prestressed concrete ribbed beam single T-slab is used as the composite bottom slab of the floor slab, multiple shear keys 14 are provided on the ribbed beam 1 along the beam length direction, and the shear keys 14 extend above the panel 2. Specifically, the shear keys 14 are shear bars, which can be welded to the internal structural reinforcement (reinforcing cage 11) of the ribbed beam 1.

[0082] Panel 2 and rib beam 1 are integrally cast and formed, and multiple panel structural ribs 21 are provided in panel 2. Specifically, the panel structural ribs 21 are arranged in the width direction of the panel, from near the top surface of panel 2 to near the bottom surface of panel 2;

[0083] Alternatively, please see Figure 4The panel structural ribs 21 are divided along the width of the panel into a first segment 211 near the top surface of the panel 2, a second segment 212 near the bottom surface or middle of the panel 2, and a connecting segment 213 connecting the first segment 211 and the second segment 212. This embodiment is the optimal choice for this implementation. Compared with the prior art, the structural ribs in the panel 2 are all located at the top and are straight. In conjunction with the aforementioned panel reinforcing ribs 33, placing the mounting base 301 at the top of the panel 2 can increase the bending resistance of the panel during demolding, transportation, and hoisting. The panel structural ribs 21 extending downwards can increase the bending resistance of the bottom of the panel during normal use after the cast-in-place layer 4 is poured.

[0084] Similarly, structural reinforcement is also provided in panel 2 and rib beam 1. For details, please refer to [the relevant documentation / reference]. Figure 5 , Figure 6 and Figure 8 The rib beam 1 contains at least a reinforcing cage 11, prestressing tendons 12, and embedded sleeves 13. Further, the reinforcing cage 11 includes top reinforcement 112, bottom reinforcement 111, and stirrups 113; the prestressing tendons 12 are arranged along the beam length of the rib beam 1 between the bottom reinforcement 111 and the top reinforcement 112; the embedded sleeves 13 are embedded at the ends of the rib beam 1 and located between the bottom reinforcement 111 and the top reinforcement 112, and additional shear reinforcement 131 is installed within the embedded sleeves 13. Further, one end of the embedded sleeve 13 is embedded within the rib beam 1 via embedded shear reinforcement 132, and the other end is exposed to form an installation end for the additional shear reinforcement 13, thus forming a three-section structure.

[0085] It should be noted that this embodiment uses a prestressed concrete ribbed single-T slab installed on frame beam 5 as the implementation scenario. Two prestressed concrete ribbed single-T slabs are hoisted onto frame beam 5, which can be implemented as a composite beam, i.e., the prestressed concrete ribbed single-T slabs are hoisted onto the precast part of frame beam 5. A post-cast space is formed between the two, which is also the post-cast part of frame beam 5. The ribs of the prestressed concrete ribbed single-T slabs form secondary beams through the post-cast space. Therefore, additional shear reinforcement with threads can be screwed into the embedded sleeve 13 to form a shear effect. Compared with the prior art where the embedded sleeve 13 is placed arbitrarily in composite beams or placed on the upper composite layer of the beam with the largest bending moment, the additional shear reinforcement at the point of maximum bending moment is subjected to tension, and the anchorage of the tensioned additional shear reinforcement with concrete is at risk of slippage, which is unsafe for shear deviation. In this embodiment, the embedded sleeve 13 can be set near the middle position of the rib 1, so that the position can be set in the middle or below the secondary beam.

[0086] Furthermore, to improve the stiffness of the post-cast portion of the composite beam, the bottom reinforcement bars 111, top reinforcement bars 112, and additional shear bars 131 on the rib beam 1 can be staggered horizontally or vertically. Therefore, when precasting prestressed concrete rib beam single T-slabs, the positions of the structural reinforcement at both ends of the prestressed concrete rib beam single T-slab can be designed in two ways, i.e., the structural reinforcement at both ends of the rib beam 1 can be designed with different outgoing reinforcement positions to meet this requirement. Please refer to [link / reference] for details. Figure 5 , Figure 5 A structural effect illustration shows a comparison of two different reinforcement methods at both ends of the rib beam 1. The red markings indicate the reinforcement positions at one end of the rib beam 1, including the bottom reinforcement 111a, the top reinforcement 112a, and the embedded sleeve 13a. Conversely, the bottom reinforcement 111b, the top reinforcement 112b, and the embedded sleeve 13b indicate the reinforcement positions at the other end of the rib beam 1.

[0087] Furthermore, the prestressing tendons 12 are intended to enhance the stiffness of the rib beam 1. Therefore, in this embodiment, they can be implemented as a non-reinforcing structure, that is, the prestressed concrete rib beam can be cast into a single T-plate and then cut off at the end.

[0088] In a preferred embodiment of this invention, the structural reinforcement in the rib beam 1, from bottom to top, consists of bottom reinforcement 111, prestressing reinforcement 12, additional shear reinforcement 131, and top reinforcement 112. The bottom reinforcement 111 and top reinforcement 112 are ordinary steel bars, protruding and avoiding the bottom reinforcement 111 on either side of the rib beam 1 at opposite positions; that is, the protruding positions of the bottom reinforcement 111 at both ends of the rib beam 1 are staggered (the two ends are bottom reinforcement 111a and top reinforcement 112b, respectively). Therefore, the two prestressed concrete rib beam T-slabs at opposite positions on the frame beam 5 are aligned end-to-end, achieving staggered reinforcement arrangement. Similarly, the additional shear reinforcement is installed through the pre-embedded sleeve 13, protruding and screwed in after the slab is hoisted, avoiding the bottom reinforcement 111 on either side of the rib beam 1 at opposite positions at opposite positions at different positions; the prestressing reinforcement 12 is not protruding, i.e., it is cut off after tensioning.

[0089] The beneficial effects of this embodiment:

[0090] This application, through the flexible application of connecting component 3, can realize large-span flat plate structures. Practical experience has shown that it can achieve at least two beam widths (mm) of 200 and 250, and various combinations of plate widths (mm) of 1500 / 1800 / 2100 / 2400 / 2700. Therefore, it can reduce the number of components to be hoisted, improving hoisting efficiency; reduce the number of rib beams by one, thereby reducing the architectural oppressive feeling caused by dense ribs and improving the building's aesthetics; and also allow for combinations of different plate widths, achieving flexible layout.

[0091] Adjacent single T-plates can be joined together by connecting components 3, which can achieve close splicing or form a joint 20 for post-casting.

[0092] Rib 1 is a complete beam structure. The internal steel cage 11, prestressed tendons 12 and embedded sleeves 13 improve the structure of rib 1. At the same time, they form a post-cast space on the frame beam 5, and the reinforcement bars are staggered to achieve the safety and convenience of installation.

[0093] Compared to existing composite beams and slabs, the additional shear reinforcement 131 can be placed in the middle of the rib beam 1, so that the additional shear reinforcement 131 will not fall off due to pull-out as in traditional technology, thereby improving shear resistance.

[0094] Standardizing components enables the productization of components, saving costs.

[0095] Structural Example 3:

[0096] Please see Figure 8 and combined Figures 1-7 This embodiment also provides a composite beam-slab structure, including the prestressed concrete ribbed beam single T-slab assembly of structural embodiment 2. Its core feature is the casting of a cast-in-place layer 4 on the prestressed concrete ribbed beam single T-slab assembly to form a floor slab.

[0097] The prestressed concrete ribbed T-slab assembly comprises multiple prestressed concrete ribbed T-slabs, each consisting of a ribbed beam 1 and a panel 2. Specifically, the connecting components 3 between adjacent prestressed concrete ribbed T-slabs on the side of the panel 2 are connected by connectors 34; the prestressed concrete ribbed T-slabs opposite each other at the ends of the ribbed beam 1 are erected on the main structure, forming a post-cast space.

[0098] Taking the composite frame beam 5 as an example, a row of prestressed concrete ribbed beam single T-slabs is erected on both the left and right sides of the frame beam 5. Each row of adjacent prestressed concrete ribbed beam single T-slabs is connected by connectors 34 and connector components 3. The connection method is either close splicing or leaving a certain post-cast joint 20. Temporary formwork 6 is set up below the post-cast joint 20 to facilitate the pouring of the cast-in-place layer 4. A post-cast space is formed between the prestressed concrete ribbed beam single T-slabs on the left and right sides of the frame beam 5. Anti-cracking steel bars 41 are lapped on the post-cast space.

[0099] Furthermore, the prestressed concrete ribbed single T-slab includes a ribbed beam 1 and a panel 2. The panel 2 has multiple connecting components 3 near at least both sides. These connecting components 3 are used in at least one of two structural configurations: first, panel reinforcing ribs 33 are provided between the connecting components 3 along the width direction of the panel 2; second, connecting parts 34 are provided on the connecting components 3 for connecting adjacent prestressed concrete ribbed single T-slabs.

[0100] First, please combine Figure 1 and Figure 2In order to achieve the first and second structural purposes, there are multiple connecting components 3, which are arranged at intervals along the direction of beam length (or slab length). No restrictions are placed on the size of the intervals, which depend on the concrete properties, thickness, and bending capacity of the panel 2.

[0101] For further information, please refer to [link / reference]. Figure 3 and Figure 4 Multiple connecting components 3 are defined as edge connecting components 31 near the side of panel 2 and center connecting components 32 located at the centerline of panel 2; panel reinforcing ribs 33 are installed on the edge connecting components 31 and center connecting components 32; connecting parts 34 for connecting adjacent prestressed concrete rib beam single T-slabs are provided on the edge connecting components 31. The multiple connecting components 3 are defined separately here for easier description later. It should be noted that the center connecting components 32 and the edge connecting components 31 have the same structure but different positions on the panel.

[0102] For details, please refer to Figure 3 The connecting component 3 includes a mounting base 301 and mounting bolts 302. The mounting base 301 is fixed to the panel 2 (in a steel structure arrangement, the mounting base 301 can be welded to the panel structural reinforcement). The mounting base 301 has mounting holes for the threaded mounting of the mounting bolts 302. Preferably, the mounting is a channel steel, with one side plate embedded and fixed to the panel 2, and the other side plate having mounting holes for the mounting bolts 302. It is worth mentioning that the choice of mounting base 301 in this embodiment is not limited to a channel steel structure; other steel structures, such as I-beams or Z-shaped steel, can also be used. The purpose is to provide a mounting base 301 that can be firmly embedded in the panel 2, so that the mounting bolts 302 can be used to install the connecting component 34 or the panel reinforcement rib 33. Furthermore, in this embodiment, both the connecting component 34 and the panel reinforcement rib 33 can be implemented as steel pipes, which are installed on the mounting base 301 through the holes by the mounting bolts 302. The plate reinforcing rib 33 is implemented as a relatively long steel pipe because it is in the same direction as the plate width span, while the connector 34 is used for splicing adjacent prestressed concrete rib beam single T plates, and is therefore implemented as a relatively short steel pipe; furthermore, both the long steel pipe and the short steel pipe are implemented as square steel pipes.

[0103] Specifically, on the same straight line, edge connecting components 31 are set at the sides of panel 2, and center connecting components 32 are set at the center of panel 2, thereby providing panel surface reinforcing ribs 33 on at least three connecting components 3. These are arranged in groups along the beam length (or panel length) to improve panel surface stiffness and increase the bending resistance of panel 2 during demolding, transportation and hoisting.

[0104] For further details, please refer to Figure 1When the prestressed concrete ribbed single-T slab is used as the composite bottom slab of the floor slab, multiple shear keys 14 are provided along the beam length on the ribbed beam 1, extending above the panel 2. Specifically, the shear keys 14 are shear reinforcements that can be welded to the internal structural reinforcement (reinforcing cage 11) of the ribbed beam 1. After the prestressed concrete ribbed single-T slab assembly is installed, the mounting base 301 on the slab, in conjunction with the connector 34, can serve as a shear reinforcement for the cast-in-place layer 4 and also facilitate the laying of the structural reinforcement of the cast-in-place layer 4. The mounting base 301 can be used as a support for the structural reinforcement of the cast-in-place layer 4.

[0105] Panel 2 and rib beam 1 are integrally cast and formed, and multiple panel structural ribs 21 are provided in panel 2. Specifically, the panel structural ribs 21 are arranged in the width direction of the panel, from near the top surface of panel 2 to near the bottom surface of panel 2;

[0106] Alternatively, please see Figure 4 The panel structural ribs 21 are divided along the width of the panel into a first segment 211 near the top surface of the panel 2, a second segment 212 near the bottom surface or middle of the panel 2, and a connecting segment 213 connecting the first segment 211 and the second segment 212. This embodiment is the optimal choice for this implementation. Compared with the prior art, the structural ribs in the panel 2 are all located at the top and are straight. In conjunction with the aforementioned panel reinforcing ribs 33, placing the mounting base 301 at the top of the panel 2 can increase the bending resistance of the panel during demolding, transportation, and hoisting. The panel structural ribs 21 extending downwards can increase the bending resistance of the bottom of the panel during normal use after the cast-in-place layer 4 is poured.

[0107] Similarly, structural reinforcement is also provided in panel 2 and rib beam 1. For details, please refer to [the relevant documentation / reference]. Figure 5 , Figure 6 and Figure 8 The rib beam 1 contains at least a reinforcing cage 11, prestressing tendons 12, and embedded sleeves 13. Further, the reinforcing cage 11 includes top reinforcement 112, bottom reinforcement 111, and stirrups 113; the prestressing tendons 12 are arranged along the beam length of the rib beam 1 between the bottom reinforcement 111 and the top reinforcement 112; the embedded sleeves 13 are embedded at the ends of the rib beam 1 and located between the bottom reinforcement 111 and the top reinforcement 112, and additional shear reinforcement 131 is installed within the embedded sleeves 13. Further, one end of the embedded sleeve 13 is embedded within the rib beam 1 via embedded shear reinforcement 132, and the other end is exposed to form an installation end for the additional shear reinforcement 13, thus forming a three-section structure.

[0108] It should be noted that this embodiment uses a prestressed concrete ribbed single-T slab installed on frame beam 5 as the implementation scenario. Two prestressed concrete ribbed single-T slabs are hoisted onto frame beam 5, which can be implemented as a composite beam, i.e., the prestressed concrete ribbed single-T slabs are hoisted onto the precast part of frame beam 5. A post-cast space is formed between the two, which is also the post-cast part of frame beam 5. The ribs of the prestressed concrete ribbed single-T slabs form secondary beams through the post-cast space. Therefore, additional shear reinforcement with threads can be screwed into the embedded sleeve 13 to form a shear effect. Compared with the prior art where the embedded sleeve 13 is placed arbitrarily in composite beams or placed on the upper composite layer of the beam with the largest bending moment, the additional shear reinforcement at the point of maximum bending moment is subjected to tension, and the anchorage of the tensioned additional shear reinforcement with concrete is at risk of slippage, which is unsafe for shear deviation. In this embodiment, the embedded sleeve 13 can be set near the middle position of the rib 1, so that the position can be set in the middle or below the secondary beam.

[0109] Furthermore, to improve the stiffness of the post-cast portion of the composite beam, the bottom reinforcement bars 111, top reinforcement bars 112, and additional shear bars 131 on the rib beam 1 can be staggered horizontally or vertically. Therefore, when precasting prestressed concrete rib beam single T-slabs, the positions of the structural reinforcement at both ends of the prestressed concrete rib beam single T-slab can be designed in two ways, i.e., the structural reinforcement at both ends of the rib beam 1 can be designed with different outgoing reinforcement positions to meet this requirement. Please refer to [link / reference] for details. Figure 5 , Figure 5 This is a structural effect illustration, which compares two different reinforcement methods at both ends of the rib beam 1. The red marks indicate the reinforcement positions at one end of the rib beam 1, including the bottom reinforcement 111a, the top reinforcement 112a, and the embedded sleeve 13a; conversely, the bottom reinforcement 111b, the top reinforcement 112b, and the embedded sleeve 13b indicate the reinforcement positions at the other end of the rib beam 1.

[0110] Furthermore, the prestressing tendons 12 are intended to enhance the stiffness of the rib beam 1. Therefore, in this embodiment, they can be implemented as a non-reinforcing structure, that is, the prestressed concrete rib beam can be cast into a single T-plate and then cut off at the end.

[0111] In a preferred embodiment of this invention, the structural reinforcement in the rib beam 1, from bottom to top, consists of bottom reinforcement 111, prestressing reinforcement 12, additional shear reinforcement 131, and top reinforcement 112. The bottom reinforcement 111 and top reinforcement 112 are ordinary steel bars, protruding and avoiding the bottom reinforcement 111 on either side of the rib beam 1 at opposite positions; that is, the protruding positions of the bottom reinforcement 111 at both ends of the rib beam 1 are staggered (the two ends are bottom reinforcement 111a and top reinforcement 112b, respectively). Therefore, the two prestressed concrete rib beam T-slabs at opposite positions on the frame beam 5 are aligned end-to-end, achieving staggered reinforcement arrangement. Similarly, the additional shear reinforcement is installed through the pre-embedded sleeve 13, protruding and screwed in after the slab is hoisted, avoiding the bottom reinforcement 111 on either side of the rib beam 1 at opposite positions at opposite positions at different positions; the prestressing reinforcement 12 is not protruding, i.e., it is cut off after tensioning.

[0112] The beneficial effects of this embodiment:

[0113] This application, through the flexible application of the connecting component 3, enables large-span flat structures to serve as unsupported base plates for composite floor slabs, thereby reducing the number of components to be hoisted and improving hoisting efficiency; reducing the number of rib beams by one, thereby reducing the sense of architectural oppression caused by dense ribs and improving the building's aesthetics; and also enabling combinations of different slab widths to achieve flexible layout.

[0114] Adjacent single T-plates can be joined together by connecting components 3, which can achieve close splicing or form a splice seam 20 after pouring, making them highly adaptable.

[0115] Rib 1 is a complete beam structure. The internal steel cage 11, prestressed tendons 12 and embedded sleeves 13 improve the structure of rib 1. At the same time, they form a post-cast space on the frame beam 5, and the reinforcement bars are staggered to achieve the safety and convenience of installation.

[0116] Compared to existing composite beams and slabs, the additional shear reinforcement 131 can be placed in the middle of the rib beam 1, so that the additional shear reinforcement 131 will not fall off due to pull-out as in traditional technology, thereby improving shear resistance.

[0117] Standardizing components enables the productization of components, saving costs.

[0118] Furthermore, the present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A prestressed concrete ribbed single T-slab, comprising ribbed beams and a panel, characterized in that, At least the following are arranged within the rib beam: A reinforcing cage, comprising top bars, bottom bars, and stirrups, wherein the top bars are staggered at their respective ends of the rib beam, and the bottom bars are staggered at their respective ends of the rib beam. Prestressing tendons are arranged between the bottom reinforcement and the top reinforcement along the beam length direction of the rib beam; An embedded sleeve is embedded at the end of the rib beam and located between the bottom reinforcement and the top reinforcement. Additional shear reinforcement is installed inside the embedded sleeve. The additional shear reinforcement is staggered at the protruding positions of the two ends of the rib beam.

2. The prestressed concrete ribbed single T-slab as described in claim 1, characterized in that: The panel is provided with a plurality of connecting components at least near both sides, and the connecting components are implemented in at least one of the following ways: Reinforcing ribs are provided between the connecting components along the width direction of the panel; A connector is provided on the connector assembly for connecting adjacent prestressed concrete rib beam T-plates.

3. The prestressed concrete ribbed beam single T-slab as described in claim 2, characterized in that: Multiple connecting components are defined as edge connecting components near the side of the panel and center connecting components located at the center line of the panel; the panel reinforcing ribs are installed on the edge connecting components and the center connecting components; connecting parts for connecting adjacent prestressed concrete rib beam single T-plates are provided on the edge connecting components.

4. The prestressed concrete ribbed beam single T-slab as described in claim 2, characterized in that: The connection assembly includes a mounting base and mounting bolts. The mounting base is fixed to the panel, and the mounting base is provided with mounting holes for threaded installation of the mounting bolts.

5. The prestressed concrete ribbed beam single T-slab as described in claim 1, characterized in that: The panel is equipped with multiple panel structural ribs; The panel structural ribs extend along the width of the panel from near the top surface to near the bottom surface of the panel; or, the panel structural ribs are divided along the width of the panel into a first segment near the top surface of the panel, a second segment near the bottom surface or the middle of the panel, and a connecting segment connecting the first segment and the second segment.

6. The prestressed concrete ribbed single T-slab as described in claim 1, characterized in that: The rib beam is provided with a plurality of shear keys along the beam length direction, and the shear keys extend above the panel.

7. A prestressed concrete ribbed beam single T-slab assembly, characterized in that, It includes multiple prestressed concrete ribbed T-slabs as described in claims 2, 3 or 4; the connecting components between adjacent prestressed concrete ribbed T-slabs on the side of the panel are connected by the connecting parts; the prestressed concrete ribbed T-slabs opposite to the ends of the ribs are erected on the main structure and form a post-cast space.

8. The prestressed concrete ribbed beam single T-slab assembly as described in claim 7, characterized in that: The prestressed tendons are implemented as a non-reinforced structure.

9. A composite beam-slab structure, characterized in that, Includes the prestressed concrete ribbed beam single T-slab assembly as described in any one of claims 7 to 8, wherein a cast-in-place layer is poured on the prestressed concrete ribbed beam single T-slab assembly.

10. The composite beam-slab structure as described in claim 9, characterized in that: The adjacent prestressed concrete rib beams are joined together or form a post-cast joint.

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