Modularized fully-fabricated reinforced concrete open-web sandwich plate structure

Abstract

The invention relates to the technical field of building structure engineering, in particular to a modularized full-assembly type reinforced concrete open-web sandwich plate structure. According to the technical scheme, the system comprises a plurality of prefabricated modules, and each prefabricated module comprises a horizontal stress system and a vertical force transmission system; the horizontal stress system comprises an upper rib and a lower rib, the upper rib and the lower rib are both concrete rib beams, longitudinal bars and stirrups are arranged in the upper rib and the lower rib, and steel bars of the upper rib and the lower rib which are coaxial are connected to form an annular framework; the vertical force transmission system comprises a reinforced concrete face plate and peripheral reinforcing steel bars, a bidirectional reinforcing steel bar net is arranged in the face plate, the peripheral reinforcing steel bars completely stretch into the upper rib and are connected with the bidirectional reinforcing steel bar net of the upper rib, and the face plate is flush with the top face of the upper rib. Flexible adaptation to complex building models can be achieved, diversified building layout requirements are met, multi-shape modular design is achieved, flexible combination is achieved when different building plane layouts and space models are faced, and the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building structure engineering, and in particular to a modular fully assembled reinforced concrete hollow sandwich plate structure. Background Art

[0002] In the rapid development of the contemporary construction industry, the demand for large-span buildings such as stadiums, exhibition centers, and large shopping malls is growing. These buildings have high requirements for the spatial load-bearing performance of the structure. Hollow sandwich panels have been widely used in large-span buildings due to their excellent spatial load-bearing performance. Existing hollow sandwich panels mostly use cast-in-place reinforced concrete technology, and have the following problems:

[0003] Complex construction: Since the hollow sandwich panel is a three-dimensional structure, it relies on on-site formwork to complete the hollow shape during construction. Its construction process is relatively complicated, and the tying of steel bars is cumbersome and requires a maintenance period, which seriously restricts construction efficiency;

[0004] Large fluctuations in construction quality: On-site craftsmanship is significantly affected by human factors, resulting in large deviations in component dimensions. This is especially true in complex modeling scenarios, where formwork installation is difficult and molding accuracy is difficult to control.

[0005] High resource consumption: The cast-in-place process requires a large amount of turnover materials (such as formwork and brackets), and the amount of construction waste generated is higher than that of the prefabricated process.

[0006] In order to solve the above problems, the present invention proposes a modular fully assembled reinforced concrete hollow sandwich plate structure. Summary of the Invention

[0007] The purpose of the present invention is to address the problems existing in the background technology and to propose a modular fully assembled reinforced concrete hollow sandwich plate structure.

[0008] The technical solution of the present invention is as follows: a modular fully assembled reinforced concrete hollow sandwich plate structure, comprising: a plurality of prefabricated modules, and the prefabricated modules include a horizontal force-bearing system and a vertical force transmission system; the horizontal force-bearing system includes upper ribs and lower ribs, and the upper ribs and lower ribs are concrete rib beams with built-in longitudinal reinforcement and stirrups, and the surrounding steel bars of the coaxial upper ribs and lower ribs are connected to form an annular skeleton; the vertical force transmission system includes a reinforced concrete panel and surrounding steel bars, and the panel has a built-in bidirectional steel mesh, and the surrounding steel bars are completely extended into the upper ribs and connected to the bidirectional steel mesh of the upper ribs, and the height of the panel is flush with the top surface of the upper ribs.

[0009] Optionally, the shape of the prefabricated module is a rectangle or a regular hexagon, the rectangular prefabricated module includes a complete rectangular module or a 1 / 2 rectangular module cut along the diagonal of the complete rectangular module, and the 1 / 2 rectangular module is a right triangle, the regular hexagonal prefabricated module includes a complete regular hexagonal module, a 1 / 2 regular hexagonal module cut along the diagonal of the complete hexagonal module, or a 1 / 6 regular hexagonal module cut from two adjacent vertices of the complete hexagonal module toward the center, and the 1 / 6 regular hexagonal module is an equilateral triangle.

[0010] Optionally, the steel bars surrounding the coaxial upper and lower ribs are lap-welded to form a ring-shaped skeleton, and the steel bars surrounding the panel and the steel bars surrounding the upper ribs are connected by lap-welding.

[0011] Optionally, the prefabricated module is provided with a solid concrete shear wall in an area enclosed by the upper ribs, the lower ribs and the shear keys, and the solid concrete shear wall has a built-in bidirectional steel mesh.

[0012] Optionally, the concrete of the prefabricated module is ordinary concrete or high-strength concrete.

[0013] Optionally, the complete regular hexagonal module is constructed using UHPC, surrounding steel bars and prestressed steel strands, and includes three groups of upper ribs and lower ribs arranged radially at an angle of 120°. Prestressed steel strands are set at the bottom of the frame, and the steel strands of the coaxial rib beams are mechanically interlocked and overlapped to form a ring-shaped load-bearing skeleton.

[0014] Optionally, the prefabricated module also includes a U-shaped steel and high-strength reinforced concrete composite module, the outer surface of the lower rib is wrapped with U-shaped steel, shear rivets are welded on the inside of the U-shaped steel, the shear key and lower rib part are cast with high-strength concrete, and the upper rib and panel part are cast with ordinary concrete.

[0015] Optionally, module docking protrusions and module docking recesses are provided between the prefabricated modules, and the module docking protrusions and module docking recesses match each other to achieve assembly positioning.

[0016] Optionally, bolt holes are provided on the upper rib and the lower rib, the high-strength bolts are passed through the bolt holes, grouting holes are provided at the bolt holes, and bolt sealing caps for sealing are provided at both ends of the high-strength bolts.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] The present invention realizes flexible adaptation to complex architectural shapes and meets diverse architectural layout requirements through modular multi-shape design and docking convex and concave point positioning structure. The multi-shape modular design enables flexible combination in the face of different architectural plan layouts and spatial shapes, thereby improving construction efficiency.

[0019] Furthermore, the present invention forms an annular skeleton by overlapping and welding the coaxial upper and lower rib steel bars, and an overall load-bearing structure connected to the panel steel bars and the upper rib steel bars, combined with a combined structure of U-shaped steel wrapped around the lower ribs and shear rivets, thereby improving the overall load-bearing capacity and deformation resistance of the structure. This improves the load-bearing capacity of the structure and greatly enhances the shear resistance and overall rigidity of the lower ribs, so that the entire structure can effectively resist deformation when bearing loads, ensuring the safety and stability of the building.

[0020] To sum up, the present invention achieves dual guarantees of rapid and accurate assembly of prefabricated modules and node sealing performance through the connection structure of the bolt holes, grouting holes and bolt sealing caps of the upper and lower ribs, in conjunction with the high-strength bolt connection process between modules, making the nodes more compact. In addition, the sealing effect of the bolt sealing cap effectively prevents moisture, debris, etc. from entering the nodes, ensuring the sealing performance and durability of the nodes, thereby ensuring the long-term stable use of the entire structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a rectangular module structure;

[0022] Figure 2 This is the assembly diagram of orthogonal rectangular modules Figure 1 ;

[0023] Figure 3 Provide an assembly diagram of orthogonal rectangular modules Figure 2 ;

[0024] Figure 4 This is a schematic diagram of a 1 / 2 rectangular module structure;

[0025] Figure 5 Provide the schematic diagram of the assembly of orthogonal oblique rectangular modules;

[0026] Figure 6 It is a schematic diagram of the hexagonal module structure;

[0027] Figure 7 A schematic diagram of the 1 / 6 unit hexagonal module structure is given;

[0028] Figure 8 This is a schematic diagram of the assembly of a 1 / 2 hexagonal structure;

[0029] Figure 9 It is an exploded diagram of the hexagonal module structure assembly;

[0030] Figure 10 Schematic diagram of the U-shaped steel and reinforced concrete composite module structure.

[0031] Reference numerals:

[0032] 1. Panel; 2. Shear key; 3. Lower rib; 4. Upper rib; 5. Module docking protrusion; 6. Module docking concave point; 7. Bolt hole; 8. Grouting hole; 9. Bolt sealing cap; 10. Solid concrete shear wall; 11. Reinforcement around the perimeter; 12. U-shaped steel; 13. Shear rivets;

[0033] A. Rectangular module; B. 1 / 2 rectangular module; C. Complete regular hexagonal module; D. 1 / 2 regular hexagonal module; E. 1 / 6 regular hexagonal module. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0036] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] Example 1

[0040] like Figures 1 to 10As shown, the present invention proposes a modular fully assembled reinforced concrete hollow sandwich plate structure, comprising: a plurality of prefabricated modules, and the prefabricated modules include a horizontal force-bearing system and a vertical force transmission system; the horizontal force-bearing system includes an upper rib 4 and a lower rib 3, the upper rib 4 and the lower rib 3 are concrete rib beams, with built-in longitudinal reinforcement and stirrups, and the coaxial upper rib 4 and the lower rib 3 are surrounded by steel bars 11 to form a ring skeleton; the vertical force transmission system includes a reinforced concrete panel 1 and surrounding steel bars 11, the panel 1 has a built-in bidirectional steel mesh, the surrounding steel bars 11 are completely extended into the upper rib 4 and connected to the bidirectional steel mesh of the upper rib 4, and the height of the panel 1 is flush with the top surface of the upper rib 4; the prefabricated modules can be connected by high-strength bolts through the upper rib 4, the lower rib 3 and the shear key 2.

[0041] Furthermore, the shape of the prefabricated module is a rectangle or a regular hexagon, and the rectangular prefabricated module includes a complete rectangular module A or a 1 / 2 rectangular module B cut along the diagonal of the complete rectangular module A, and the 1 / 2 rectangular module B is a right triangle. The regular hexagonal prefabricated module includes a complete regular hexagonal module C, a 1 / 2 regular hexagonal module D cut along the diagonal of the complete hexagonal module C, or a 1 / 6 regular hexagonal module E cut from two adjacent vertices of the complete hexagonal module C toward the center, and the 1 / 6 regular hexagonal module E is an equilateral triangle.

[0042] Secondly, the coaxial upper ribs 4 and the steel bars 11 around the lower ribs 3 are overlapped and welded to form a ring-shaped skeleton, and the steel bars 11 around the panel 1 and the steel bars 11 around the upper ribs 4 are overlapped and welded.

[0043] Furthermore, the precast modules are equipped with a solid concrete shear wall 10 within the area enclosed by the upper ribs 4, lower ribs 3, and shear keys 2. This solid concrete shear wall 10 incorporates a built-in bidirectional steel mesh. The concrete used in the precast modules can be either ordinary concrete or high-strength concrete. The precast modules are provided with module docking protrusions 5 and module docking recesses 6, which mate with each other to ensure proper assembly and positioning. Bolt holes 7 are provided in the upper and lower ribs 4 and 3, and high-strength bolts are inserted into these holes. Grouting holes 8 are provided at the bolt holes 7, and bolt sealing caps 9 are provided at each end of the high-strength bolts for sealing.

[0044] The working principle of this embodiment is:

[0045] Rebar binding: Use a three-dimensional positioning formwork to fix the steel bars 11 around the rib beam, and perform lap welding on the ring frame in the node area;

[0046] Moulding: Use special moulds to support the mould and pour ordinary concrete, vibrate and compact it, steam cure for 48 hours and then remove the mould;

[0047] Precision verification: Laser 3D scanner inspection, focusing on the appearance size and 7-digit coordinates of the bolt holes. After meeting the design requirements, it is cured for 28 days and can be shipped only after reaching the design strength.

[0048] On-site assembly process:

[0049] Module splicing: After the modules are transported to the site, the upper ribs 4, lower ribs 3 and shear keys 2 of adjacent modules are connected with high-strength bolts. They are tightened in sequence from "lower rib 3 to shear key 2 to upper rib 4". After tightening is completed, the structural design bearing capacity requirements are met;

[0050] Joint treatment: After the module is assembled, the joints are filled with special fillers and the surface is painted with waterproof paint to achieve flatness and waterproof requirements;

[0051] Bolt hole treatment: Bolt sealing caps 9 are used to seal both ends of the bolts, and pressure grouting is performed on the bolt holes 7 through the grouting holes 8 to increase the mechanical bite force and fire protection requirements between the bolts and the components.

[0052] Example 2

[0053] like Figures 6 to 9 As shown, based on the first embodiment, the regular hexagonal module C is constructed with UHPC, surrounding steel bars 11 and prestressed steel strands, and includes three groups of upper ribs 4 and lower ribs 3 radially arranged at an angle of 120°. Prestressed steel strands are set at the bottom of the frame, and the steel strands of the coaxial rib beams are mechanically interlocked and overlapped to form a ring-shaped load-bearing skeleton.

[0054] Furthermore, the prefabricated module also includes a U-shaped steel 12 and high-strength reinforced concrete composite module, wherein the outer surface of the lower rib 3 is wrapped with the U-shaped steel 12, and shear rivets 13 are welded on the inside of the U-shaped steel 12. The shear key 2 and the lower rib 3 are cast with high-strength concrete, and the upper rib 4 and the panel 1 are cast with ordinary concrete.

[0055] The working principle of this embodiment is as follows: the high-strength concrete regular hexagonal module C is constructed with UHPC with a compressive strength of ≥100 MPa, reinforced steel bars 11 on all sides, and prestressed steel strands. Its core structure is similar to the rectangular structure principle embodiment 1, with the following additions compared to the rectangular module A:

[0056] Spatial grid unit: Three groups of upper ribs 4 and lower ribs 3 are arranged radially at an angle of 120°. Prestressed steel strands are set at the bottom of the frame, and the coaxial rib beam steel strands are mechanically overlapped to form a ring-shaped load-bearing skeleton.

[0057] Boundary adaptation module: 1 / 6 regular hexagonal module E and 1 / 2 regular hexagonal module D, the number of steel bars 11 around the lower rib 3 is increased by 30% on the basis of the complete module;

[0058] Prefabrication key processes:

[0059] Prestressed construction: pre-tensioning steel strands;

[0060] Curing: Steam curing for 72 hours. The component strength should be ≥90% of the design value when demoulding.

[0061] The key points of on-site assembly are the same as those of Example 1.

[0062] Example 3

[0063] like Figures 6 to 9 As shown, based on the above-mentioned embodiment 1 or embodiment 2, the 1 / 6 regular hexagonal module E is one-sixth of the complete regular hexagonal module C, and is mainly used to fill the corner positions when the complete regular hexagonal modules C are combined.

[0064] The horizontal load-bearing system's upper and lower ribs (4 and 3) are arranged identically to their counterparts in a complete regular hexagonal module C, featuring internal longitudinal reinforcement, stirrups, and prestressed steel strands. The strands of the coaxial ribs are mechanically interlocked and overlapped, forming a load-bearing framework adapted to the 1 / 6 regular hexagonal structure. The number of steel bars (11) surrounding the lower rib (3) is increased by 30% compared to the complete module to enhance its load-bearing performance at the corners.

[0065] The panel 1 of the vertical force transmission system has a built-in bidirectional steel mesh, and the surrounding steel bars 11 are connected to the bidirectional steel mesh of the upper rib 4. The height of the panel 1 is flush with the top surface of the upper rib 4, and the panel size fits a 1 / 6 regular hexagon to ensure that the vertical load in this area can be effectively transmitted.

[0066] The prefabrication process is identical to that of the full hexagonal module C, but the molds and formwork are adapted to the dimensions of a 1 / 6 regular hexagon. During on-site assembly, the 1 / 6 regular hexagonal module E is mated with the full hexagonal module C or the 1 / 2 regular hexagonal module D. The modules are positioned using the module joint projections 5 and recesses 6, and connected with high-strength bolts to form a complete structural system, providing load transfer and structural stability at the corners.

[0067] The above specific embodiments are merely several optional embodiments of the present invention. Based on the technical solutions of the present invention and the relevant inspirations of the above embodiments, those skilled in the art may make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A modular fully assembled reinforced concrete hollow sandwich plate structure, characterized in that: include: Multiple prefabricated modules, each of which includes a horizontal force-bearing system and a vertical force-transmitting system; The horizontal force-bearing system includes an upper rib (4) and a lower rib (3), both of which are concrete rib beams with built-in longitudinal reinforcement and stirrups. The coaxial upper rib (4) and lower rib (3) are connected by surrounding steel bars (11) to form a ring-shaped skeleton. The vertical force transmission system comprises a reinforced concrete panel (1) and surrounding steel bars (11); the panel (1) has a built-in bidirectional steel mesh; the surrounding steel bars (11) completely extend into the upper rib (4) and are connected to the bidirectional steel mesh of the upper rib (4); and the height of the panel (1) is flush with the top surface of the upper rib (4).

2. A modular fully assembled reinforced concrete hollow sandwich plate structure according to claim 1, characterized in that: The shape of the prefabricated module is a rectangle or a regular hexagon. The rectangular prefabricated module includes a complete rectangular module (A) or a 1 / 2 rectangular module (B) cut along the diagonal of the complete rectangular module (A), and the 1 / 2 rectangular module (B) is a right triangle. The regular hexagonal prefabricated module includes a complete regular hexagonal module (C), a 1 / 2 regular hexagonal module (D) cut along the diagonal of the complete hexagonal module (C), or a 1 / 6 regular hexagonal module (E) cut from two adjacent vertices of the complete hexagonal module (C) toward the center, and the 1 / 6 regular hexagonal module (E) is an equilateral triangle.

3. A modular fully assembled reinforced concrete hollow sandwich plate structure according to claim 1, characterized in that: The coaxial upper rib (4) and the steel bars (11) around the lower rib (3) are overlapped and welded to form a ring-shaped skeleton, and the steel bars (11) around the panel (1) and the steel bars (11) around the upper rib (4) are overlapped and welded.

4. The modular fully assembled reinforced concrete hollow sandwich plate structure according to claim 1, characterized in that: The prefabricated module is provided with a solid concrete shear wall (10) in an area enclosed by an upper rib (4), a lower rib (3) and a shear key (2), wherein the solid concrete shear wall (10) has a built-in bidirectional steel mesh.

5. The modular fully assembled reinforced concrete hollow sandwich plate structure according to claim 1, characterized in that: The concrete of the prefabricated module is ordinary concrete or high-strength concrete.

6. The modular fully assembled reinforced concrete hollow sandwich plate structure according to claim 2, characterized in that: The complete regular hexagonal module (C) is constructed of UHPC, surrounding steel bars (11) and prestressed steel strands, and comprises three groups of upper ribs (4) and lower ribs (3) radially arranged at an angle of 120°. Prestressed steel strands are arranged at the bottom of the frame, and the steel strands of the coaxial rib beams are mechanically interlocked and overlapped to form a ring-shaped load-bearing skeleton.

7. The modular fully assembled reinforced concrete hollow sandwich plate structure according to claim 1, characterized in that: The prefabricated module also includes a U-shaped steel (12) and high-strength reinforced concrete combined module, wherein the outer surface of the lower rib (3) is wrapped with the U-shaped steel (12), and the inner side of the U-shaped steel (12) is welded with a shear rivet (13), the shear key (2) and the lower rib (3) are partially cast with high-strength concrete, and the upper rib (4) and the panel (1) are partially cast with ordinary concrete.

8. The modular fully assembled reinforced concrete hollow sandwich plate structure according to claim 1, characterized in that: Module docking convex points (5) and module docking concave points (6) are provided between the prefabricated modules, and the module docking convex points (5) and the module docking concave points (6) match each other to achieve assembly positioning.

9. The modular fully assembled reinforced concrete hollow sandwich plate structure according to claim 1, characterized in that: Bolt holes (7) are provided on the upper rib (4) and the lower rib (3), the high-strength bolts are passed through the bolt holes (7), grouting holes (8) are provided at the bolt holes (7), and bolt sealing caps (9) for sealing are provided at both ends of the high-strength bolts.

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