A concrete shear wall structure with high bending resistance

Abstract

This invention discloses a high-flexural-resistance concrete shear wall structure, which comprises a fiber composite mesh and square open steel pipes. The fiber composite mesh is vertically arranged in the shear wall, replacing the horizontal and vertical distributed reinforcement in traditional reinforced concrete shear walls. The meshes are connected by tie bars to form an internal skeleton. The square open steel pipes are arranged at both ends of the shear wall, with the openings facing inward, wrapping around the two ends of the shear wall. This invention combines the fiber composite mesh, square open steel pipes, and end column construction type to improve the flexural resistance of the shear wall.

Description

Technical Field

[0001] This invention belongs to the field of concrete structure technology, specifically relating to a high-flexural-resistance concrete shear wall structure configured with fiber composite mesh and open steel pipes. Technical Background

[0002] With the continuous development of society and economy, high-rise buildings are gradually becoming the trend in housing construction, and shear walls, as stable lateral force resisting components, are often favored by many structural designers. Shear walls in high-rise buildings often have a large height-to-width ratio and significant bending effects. Ensuring that shear walls have stable bending capacity under horizontal loads, while also possessing good ductility and energy dissipation capacity, is a crucial performance characteristic of shear wall structures.

[0003] This invention proposes a high-flexural-strength concrete shear wall combining a fiber composite mesh and a square open steel tube. This invention is applicable to the design of concrete shear walls with various shear span ratios. Summary of the Invention

[0004] Technical Problem: In order to overcome the shortcomings of the existing technology, the present invention provides a high-bending-performance concrete shear wall structure, which adopts a fiber composite mesh and open steel pipe to improve the bending bearing capacity of the concrete shear wall. It has the characteristics of simple structure, convenient construction and improved bending bearing capacity of components.

[0005] Technical Solution: To achieve the above objectives, the technical solution adopted by the present invention for a high flexural performance concrete shear wall structure is as follows:

[0006] The structure comprises a fiber composite mesh, square open steel pipes, concrete, and tie bars. Multiple fiber composite meshes are vertically arranged in the shear wall and connected by tie bars. The square open steel pipes are arranged at both ends of the shear wall, wrapping the ends of the multiple vertically arranged meshes to form edge members of the shear wall. Concrete is poured to enclose the entire fiber composite mesh, forming a high-flexural-strength concrete shear wall structure.

[0007] The fiber composite mesh is formed by interlacing and bonding longitudinal and transverse fibers to create a mesh structure, which has good anchoring performance.

[0008] The fiber composite mesh is made of glass fiber, carbon fiber, basalt fiber, or aramid fiber.

[0009] The preferred carbon fiber is lightweight and high-strength, which can effectively inhibit the propagation of cracks in concrete shear walls under horizontal loads.

[0010] The single-limb carbon fiber mesh reinforcement in the fiber composite mesh is made of sheet-like reinforcement bonded together with epoxy resin, and its tensile strength is more than twice that of ordinary steel bars; the cross-sectional area is greater than 14 mm². 2 Fiber composite mesh can replace the horizontal and vertical reinforcing bars in traditional reinforced concrete shear walls, forming an integrated structure and reducing the workload of on-site reinforcement processing and tying.

[0011] The opening of the square-shaped open steel pipe is located in the middle of one side of the pipe, and its cross-section is C-shaped.

[0012] The square open steel pipe has a wall thickness greater than 0.5 mm, is made of steel, preferably stainless steel or steel with good deformation properties, and has a tensile strength greater than 400 MPa.

[0013] The tie bar is a metal tie bar or a fiber tie strip.

[0014] The tie bars are steel bars with a diameter greater than 6mm, and are connected to the fiber composite mesh by steel wire.

[0015] The concrete shear wall structure is formed by integral casting. First, a fiber composite mesh skeleton is formed inside, and then concrete is poured to complete the shear wall formation. This shear wall has good seismic performance.

[0016] Beneficial Effects: This invention provides a high-performance concrete shear wall with a fiber composite mesh and open steel pipes. Its internal framework is composed of two different materials: the fiber composite mesh and the square open steel pipes. Multiple fiber composite meshes can be vertically arranged within the shear wall, connected by tie bars. The square open steel pipes are positioned at both ends of the shear wall, with the ends of the vertically arranged fiber composite meshes extending into the open steel pipes. The dimensions and cross-sectional area of ​​the fiber composite mesh can be determined according to the bending performance requirements of the shear wall. When the shear wall bears a horizontal load, the vertical component of the principal tensile stress in the fiber composite mesh-reinforced concrete shear wall is primarily borne by the fiber composite mesh. Its high strength enhances the bending threshold of the component. Combined with the square open steel pipes, it inhibits crack development, reduces crack width, increases the height of the concrete compression zone at the bottom of the shear wall, and delays the crushing of the concrete on both sides of the shear wall, thereby improving the bending capacity of the shear wall. This invention features simple construction, convenient installation, and improved bending capacity of components. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the AA cross-sectional structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the square open steel pipe used in this invention.

[0020] The components are: 1. Fiber composite mesh; 2. Square open steel pipe; 3. Concrete; 4. Tie bar. Detailed Implementation

[0021] This invention relates to a high-flexural-performance concrete shear wall with a fiber composite mesh and open steel pipes. The high-flexural-performance concrete shear wall structure of this invention comprises a fiber composite mesh 1, square open steel pipes 2, concrete 3, and tie bars 4. Multiple fiber composite meshes 1 are vertically arranged in the shear wall and connected by tie bars 4. The square open steel pipes 2 are arranged at both ends of the shear wall, wrapping around the ends of the multiple vertically arranged meshes 1 to form edge members of the shear wall. The concrete 3 is poured to enclose the entire fiber composite mesh 1, forming the high-flexural-performance concrete shear wall structure.

[0022] The reinforcement includes a fiber composite mesh and square open steel pipes. The fiber composite mesh is arranged vertically at designed intervals according to the bending performance requirements of the shear wall. Its unique mesh form unifies the replacement of the horizontal and vertical distribution bars in traditional reinforced concrete shear walls. The meshes are connected by tie bars to form a framework. The square open steel pipes are arranged at both ends of the shear wall, with the openings of the pipes facing inwards to enclose both ends of the mesh. This invention utilizes fiber composite materials to enhance the overall structural load-bearing characteristics in the form of an integrated mesh. The unique mesh structure also simplifies the construction process of the shear wall. This invention improves the bending performance of concrete shear walls by utilizing the high strength of the fiber composite mesh and its special end structure.

[0023] Furthermore, the type of fiber composite mesh can be variable, including one of the following composite meshes: glass fiber, carbon fiber, basalt fiber, or aramid fiber.

[0024] Furthermore, the fiber composite mesh is formed by interlacing and bonding longitudinal and transverse fibers, and has overall stress-bearing characteristics.

[0025] Furthermore, the fiber composite mesh can replace the horizontal and vertical reinforcing bars in traditional reinforced concrete shear walls, forming an integrated structure.

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] like Figure 1 , Figure 2As shown, a high-shear-performance concrete shear wall structure with a fiber composite mesh includes a fiber composite mesh 1, square open steel pipes 2, concrete 3, and tie bars 4. The fiber composite mesh 1 is arranged vertically in multiple layers at designed intervals (only two layers are shown in the figure for simplicity), replacing the horizontal and vertical distribution bars of a conventional concrete shear wall, and is connected by tie bars 4 to form an internal skeleton. The square open steel pipes 2 are arranged at both ends of the shear wall, with the openings facing inward, wrapping the ends of the vertically arranged fiber composite mesh 1. The concrete 3 is integrally cast after the internal skeleton is formed. The fiber composite mesh 1 is formed by the intersecting horizontal and vertical fiber bars, forming a mesh structure that replaces the horizontal and vertical distribution bars in a conventional concrete shear wall. The vertical fibers of the fiber composite mesh 1 provide the bending resistance of the component, while the horizontal fibers provide the shear resistance.

[0028] The tie bar 4 is a metal tie bar or a fiber tie strip. The tie bar 4 is a steel bar with a diameter greater than 6mm, and is connected to the fiber composite mesh via steel wire.

[0029] like Figure 3 As shown, the square open steel pipe 2 has good mechanical properties. The wall thickness of the square open steel pipe 2 is greater than 0.5 mm, and the material is steel, preferably stainless steel or steel with good deformation properties, with a tensile strength greater than 400 MPa. It wraps both ends of the multi-layer fiber composite mesh 1, enhancing its bonding performance with concrete and delaying the crushing of the concrete at the shear wall ends.

[0030] The concrete shear wall structure is formed by integral casting. First, a fiber composite mesh skeleton is formed inside, and then concrete is poured to complete the shear wall formation. This shear wall has good seismic performance.

[0031] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-flexural-resistance concrete shear wall structure, characterized in that: The structure includes a fiber composite mesh (1), a square open steel pipe (2), concrete (3), and tie bars (4); multiple fiber composite meshes (1) are arranged vertically in the shear wall and connected by tie bars (4); the square open steel pipes (2) are arranged at both ends of the shear wall, and the square open steel pipes (2) wrap around the ends of the multiple vertically arranged fiber composite meshes (1) to form the edge members of the shear wall; the concrete (3) is poured to wrap around the entire fiber composite mesh (1) to form a high bending performance concrete shear wall structure.

2. The high flexural strength concrete shear wall structure according to claim 1, characterized in that: The fiber composite mesh (1) is formed by bonding longitudinal and transverse fibers together to form a mesh structure.

3. The high flexural strength concrete shear wall structure according to claim 2, characterized in that: The fiber composite mesh (1) is made of glass fiber, carbon fiber, basalt fiber or aramid fiber.

4. The high flexural strength concrete shear wall structure according to claim 3, characterized in that: The single-limb carbon fiber mesh reinforcement in the fiber composite mesh (1) is made of sheet-like reinforcement bonded together with epoxy resin, and its tensile strength is more than twice that of ordinary steel bars; the cross-sectional area is greater than 14 mm². 2 .

5. The high flexural strength concrete shear wall structure according to claim 1, characterized in that: The opening of the square open steel pipe (2) is located in the middle of one side of the steel pipe, and its cross-section is C-shaped.

6. The high flexural strength concrete shear wall structure according to claim 5, characterized in that: The wall thickness of the square open steel pipe (2) is greater than 0.5 mm, the material is steel, and the tensile strength is greater than 400 MPa.

7. The high flexural strength concrete shear wall structure according to claim 1, characterized in that: The tie bar (4) is a metal tie bar or a fiber tie strip.

8. The high flexural strength concrete shear wall structure according to claim 7, characterized in that: The tie bar (4) is a steel bar with a diameter greater than 6 mm, and is connected to the fiber composite mesh by steel wire.

9. A high-flexural-resistance concrete shear wall structure according to claim 7, characterized in that: The concrete shear wall structure is formed by integral casting. First, a fiber composite mesh skeleton is formed inside, and then concrete is poured to complete the shear wall formation.

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