A prestressed self-resetting steel plate concrete composite shear wall

Abstract

This invention relates to a novel shear wall, and more particularly to a prestressed self-centering steel plate-concrete composite shear wall, belonging to the field of structural engineering technology. This shear wall consists of a surface steel plate, internal concrete, thermal insulation materials, double-steel-tube concrete columns, connecting angle steel, square tie rods, anchorages, and prestressing tendons. The surface steel plate is made of thin steel; the internal thermal insulation materials are materials such as rock wool; the double-steel-tube concrete columns have round steel tubes inside and square steel tubes outside; the prestressing tendons are unbonded post-tensioned prestressing tendons. The prestressed self-centering steel plate-concrete composite shear wall provided by this invention is a novel lateral force resisting component for high-rise structures or other structures. It features light weight, good seismic performance, and high ductility, making it an excellent lateral force resisting component.

Description

Technical Field

[0001] This invention relates to a novel shear wall, and more particularly to a prestressed self-resetting concrete composite shear wall, belonging to the field of structural engineering technology. Background Technology

[0002] With the continuous improvement of my country's economy, in order to adapt to the needs of domestic residents and meet the competition for land between people and the environment, high-rise buildings have gradually become an important module in the development of civil engineering. Due to the large load-bearing capacity, high lateral stiffness, and good seismic performance of shear wall structures, as well as the neat and flat interior space and high space utilization, shear wall structures are widely used and promoted in high-rise buildings.

[0003] As building height increases, using traditional reinforced concrete shear walls results in excessive thickness, impacting usability, and is also less economical and less safe. Therefore, steel-concrete composite shear walls have emerged.

[0004] In existing technologies, steel plate-concrete composite shear walls are widely used. Steel plate-concrete composite shear walls are mainly divided into three structural forms: First, steel plate-encased concrete composite shear walls. However, the concrete is not effectively restrained around the steel plate, and its stress performance is not improved. The concrete is prone to cracking, and after the member reaches its ultimate bearing capacity, the concrete crushes and easily falls off. Second, single-sided steel plate-concrete composite shear walls. This type of shear wall does not effectively utilize the strength of the concrete wall. While increasing the buckling strength of the steel plate, it also increases the load, amplifying the seismic response of the structure under earthquakes. After the concrete fails, there is no reliable restraint, and it is prone to falling off. Third, double-layer steel plate-encased concrete composite shear walls. However, in practical applications, it still has the disadvantages of excessive stiffness and less than ideal ductility. Excessive stiffness makes it difficult to distribute and adjust the stiffness of the structure, resulting in excessive concentration of stiffness in the double steel plate-concrete composite shear walls, which is not conducive to achieving the multiple seismic defense lines and overall load-bearing capacity advocated in the code.

[0005] This invention ( Figure 1The prestressed self-centering steel plate concrete composite shear wall is an improvement and breakthrough of the double steel plate concrete composite shear wall, addressing the aforementioned shortcomings. The entire wall is prefabricated. Internal energy-dissipating filler is fixed to the steel plates using tie bolts. The double steel tube concrete columns and steel plates are welded together, serving as a template for pouring the internal concrete. Plain concrete is then poured inwards, thus dividing the originally monolithic shear wall into a ribbed wall, surface steel plates, double steel tube concrete columns, and internal thermal insulation devices. This reduces the wall's lateral stiffness and further increases its ductility. After factory curing, the shear wall is hoisted to the site and connected to the upper and lower walls using post-tensioned unbonded prestressing tendons. It should be noted that the dimensions of the thermal insulation blocks should be adjusted according to the actual project requirements. Overall, the prestressed self-centering steel plate concrete composite shear wall can further improve the mechanical and seismic performance of the double steel plate concrete composite shear wall. Summary of the Invention

[0006] This invention proposes a prestressed self-resetting steel-concrete composite shear wall, aiming to improve the wall's seismic and wind resistance performance. It fully utilizes the advantages of steel and concrete to meet multiple seismic requirements; employing prefabricated modules, all components can be prefabricated in the factory and transported to the site where post-tensioned unbonded prestressing tendons are used to connect the upper and lower walls, avoiding on-site wet work. This enables industrialization and modularization, reducing construction time and saving costs.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides a prestressed self-resetting steel plate concrete composite shear wall, such as... Figure 1 As shown, the shear wall consists of two surface steel plates 1, ribbed plain concrete 3 inside the wall, two double-steel-tube concrete columns 2, and internal thermal insulation blocks 4. The wall is prefabricated as a whole. The thermal insulation material 4 is connected to the two surface steel plates 1 by tie bolts 10. The plain concrete 3 inside the wall is connected to the surface steel plates by connecting angle steel 5 and square tie bars 6 welded to the steel plates to ensure their coordinated operation. Double-steel-tube concrete columns 2 are set on both sides of the shear wall. The double-steel-tube concrete columns have round steel pipes inside and square steel pipes outside. The surface steel plates 1 are connected by connecting angle steel 5 and square tie bars 6. The connecting angle steel 5 is welded to the double-steel-tube concrete columns 2 and the surface steel plates 1. The square tie bars 6 are welded to the connecting angle steel 5.

[0008] Compared with traditional double steel plate-concrete composite shear walls, the present invention has the following main advantages and effects:

[0009] 1) Reduce concrete usage, lower structural weight, and reduce seismic forces.

[0010] 2) Depending on the actual engineering needs, porous energy-consuming materials such as aluminum foam can be placed inside the thermal insulation device to further enhance the seismic performance of the structure.

[0011] 3) Fully prefabricated construction reduces construction time and pollution;

[0012] 4) The stiffness was appropriately reduced, which facilitates the adjustment of the structural stiffness and effectively reduces temperature stress.

[0013] In summary, this invention improves the seismic performance of double steel plate-concrete composite shear walls on the one hand, and accelerates construction progress while being energy-saving and environmentally friendly on the other. Attached Figure Description

[0014] Figure 1 Detailed internal view of a prestressed self-resetting steel plate concrete composite shear wall;

[0015] Figure 2 This is a schematic diagram of the vertical cross-section of the present invention;

[0016] Figure 3 This is a detailed drawing of the double steel pipe concrete structure in this invention;

[0017] Figure 4 This is a schematic diagram of the thermal insulation device of the present invention;

[0018] Figure 5 This is a schematic diagram of a tie bolt.

[0019] Marked in the image:

[0020] 1—Steel plate on the wall surface; 2—Double steel tube concrete; 2-1—Square steel tube; 2-2—Confined concrete; 2-3—Round steel tube; 3—Plain concrete inside the wall; 4—Thermal insulation material; 4-1—Fireproof and waterproof coating; 4-2—Thermal insulation device; 4-3—Sound insulation board; 5—Connecting angle steel; 6—Square lacing strip; 7—Anchorage; 8—Prestressed tendon; 9—Ground beam; 10—Tie bolt Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings.

[0022] Said view Figure 1This invention relates to a prestressed self-resetting steel plate concrete composite shear wall. The wall is prefabricated as a whole. Thermal insulation material 4 is connected to the two surface steel plates 1 of the wall via tie bolts 10. The plain concrete 3 inside the wall is connected to the surface steel plates by connecting angle steel 5 and square tie bars 6 welded to the steel plates to ensure their coordinated operation. Double steel tube concrete columns 2 are installed on both sides of the shear wall. The double steel tube concrete columns 2 have round steel tubes inside and square steel tubes on the outside. The surface steel plates of the wall are connected by connecting angle steel 5 and square tie bars 6. The connecting angle steel 5 is welded to the double steel tube concrete columns 2 and the surface steel plates 1 of the wall; the square tie bars 6 are welded to the connecting angle steel 5.

[0023] The aforementioned prestressed self-resetting steel plate concrete composite shear wall has a large out-of-plane stiffness, which can effectively control out-of-plane deformation during transportation, installation and use, and maintain the stability and safety of the steel plate.

[0024] The prestressed self-resetting concrete composite shear wall proposed in this invention is an improvement on the traditional double steel plate-concrete composite shear wall. It fills the interior of the wall with thermal insulation materials, reducing concrete usage, lowering the structural self-weight, and mitigating seismic forces. It also appropriately reduces stiffness, facilitating structural stiffness adjustment and effectively reducing temperature stress. Furthermore, it employs fully prefabricated construction, shortening the construction period and reducing pollution. In summary, this invention improves the seismic performance of double steel plate-concrete composite shear walls while accelerating construction progress and promoting energy conservation and environmental protection.

Claims

1. A prestressed self-centering steel plate reinforced concrete composite shear wall, characterized in that: The wall body is integrally prefabricated, including two wall surface steel plates, inner plain concrete, double steel pipe concrete columns on both sides and internal heat insulation material; the double steel pipe concrete columns are circular steel pipes inside and square steel pipes outside; the heat insulation material is connected with the two wall surface steel plates through the tension bolts; the inner plain concrete is connected with the wall surface steel plates through the connecting angle steels welded inside the wall surface steel plates and the square patch strips, the double steel pipe concrete columns and the wall surface steel plates are connected together through welding to serve as a formwork for pouring the internal concrete, then the plain concrete is poured into the formwork to form dense ribs, the heat insulation material is arranged between the dense ribs, the wall surface steel plates are connected through the connecting angle steels and the square patch strips, the connecting angle steels are welded with the double steel pipe concrete columns and the wall surface steel plates, and the square patch strips are welded with the connecting angle steels; the upper and lower adjacent prefabricated shear wall bodies are connected through the post-tensioned unbonded prestressed tendons arranged along the wall body vertically, and the wall surface steel plates adopt low yield point high ductility steel or high strength high ductility steel.

2. The prestressed self-centering steel plate reinforced concrete composite shear wall according to claim 1, characterized in that: The inner plain concrete is connected with the wall surface steel plates through the shear bolt nails welded on the steel plates and the tension bolts.

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