Concrete shear wall structure with high bending resistance

Abstract

The invention discloses a concrete shear wall structure with high bending resistance. The shear wall comprises a fiber composite material grid and square open steel pipes, the fiber composite material grids are vertically arranged in the shear wall and replace horizontal and vertical distribution bars in a traditional reinforced concrete shear wall, and the grids are tied through tie bars to form an internal framework. The square opening steel pipes are arranged at the two ends of the shear wall, are opened inwards and wrap the ends of the two sides of the shear wall. The bending resistance of the shear wall is improved by combining the fiber composite material grids, the square opening steel pipes and the end columns.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete structures, and in particular relates to a high-bending-performance concrete shear wall structure configured with a fiber composite material grid and an open steel pipe. Technical Background

[0002] With the continuous development of social economy, high-rise buildings have gradually become a trend in housing construction, and shear walls, as stable lateral force-resisting components, are often favored by many building structure designers. Shear walls in high-rise buildings often have a large aspect ratio and significant bending effect. How to ensure that shear walls have stable bending bearing capacity under horizontal loads, and at the same time have good ductility and energy dissipation capacity is an important performance of shear wall structures.

[0003] The present invention combines a fiber composite material grid and a square open steel pipe to propose a high bending performance concrete shear wall that combines a fiber composite material grid and an open steel pipe. The present 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 deficiencies in the prior art, the present invention provides a high flexural performance concrete shear wall structure, which adopts a fiber composite material grid and an open steel pipe to improve the flexural bearing capacity of the concrete shear wall. It has the characteristics of simple structure, convenient construction, and improved flexural bearing capacity of components.

[0005] Technical solution: To achieve the above purpose, the technical solution adopted by a high bending performance concrete shear wall structure of the present invention is:

[0006] It comprises a fiber composite material grid, a square open steel pipe, concrete and tie bars; the fiber composite material grid is vertically arranged in multiple pieces in the shear wall and connected by tie bars; the square open steel pipe is arranged at the ends of both sides of the shear wall, and the square open steel pipe wraps the ends of the multiple vertically arranged grids to form the edge components of the shear wall; concrete is poured and wrapped around the entire fiber composite material grid to form a high bending performance concrete shear wall structure.

[0007] The fiber composite material grid is formed into a grid structure by overlapping and gluing longitudinal fibers and transverse fibers in an interlaced manner, and has good anchoring performance.

[0008] The fiber composite material grid is glass fiber, carbon fiber, basalt fiber or aramid fiber.

[0009] Carbon fiber is preferred because it is lightweight and high-strength and can effectively inhibit the expansion of cracks in concrete shear walls under horizontal loads.

[0010] The single-limb carbon fiber grid reinforcement in the fiber composite material grid is made of sheet reinforcement material bonded by epoxy resin, and its tensile strength is more than twice that of ordinary steel bars; the cross-sectional area is greater than 14mm 2 The fiber composite mesh can replace the horizontal and vertical distribution steel bars in the traditional reinforced concrete shear wall to form an integrated structure, reducing the workload of on-site steel bar processing and binding.

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

[0012] The wall thickness of the square open steel pipe is greater than 0.5 mm, and the material is steel material, preferably stainless steel and steel material with good deformation performance, and the tensile strength is greater than 400 MPa.

[0013] The tie bars are metal tie bars or fiber tie belts.

[0014] The tie bars are steel bars with a diameter greater than 6 mm and are connected to the fiber composite material grid via steel wires.

[0015] The concrete shear wall structure is formed by integral casting. First, a fiber composite material grid skeleton is formed inside, and then concrete is cast to complete the shear wall. The shear wall has good earthquake resistance.

[0016] Beneficial effects: The present invention provides a high-performance concrete shear wall configured with a fiber composite material grid and an open steel pipe, wherein the internal skeleton is composed of two different materials, a fiber composite material grid and a square open steel pipe. Multiple fiber composite material grids can be arranged vertically in the shear wall, and the grids are tied together by tie bars. The square open steel pipes are arranged at both ends of the shear wall, and the ends of the vertically arranged fiber composite material grids extend into the open steel pipes. Parameters such as the fiber composite material grid size and the grid cross-sectional area can be determined according to the bending performance requirements of the shear wall. When the shear wall bears horizontal loads, the vertical component of the principal tensile stress of the fiber composite material grid reinforced concrete shear wall is mainly borne by the fiber composite material grid, and its high-strength characteristics are used to increase the bending threshold of the component. In combination with the square open steel pipe, the crack development is suppressed, the crack width is reduced, the height of the concrete compression zone at the bottom of the shear wall is increased, and the concrete on both sides of the shear wall is delayed from being crushed, thereby improving the bending bearing capacity of the shear wall. The present invention has the characteristics of simple structure, convenient construction, and improved bending bearing capacity of components. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0019] Figure 3 Schematic diagram of a square open steel pipe used in the present invention.

[0020] Wherein: fiber composite material grid 1, square open steel pipe 2, concrete 3, tie bars 4. DETAILED DESCRIPTION

[0021] The present invention relates to a high-bending performance concrete shear wall configured with a fiber composite material grid and an open steel pipe. The high-bending performance concrete shear wall structure of the present invention comprises a fiber composite material net 1, a square open steel pipe 2, concrete 3 and tie bars 4; the fiber composite material grid 1 is vertically arranged in multiple pieces in the shear wall, and is connected by tie bars 4; the square open steel pipe 2 is arranged at the ends of both sides of the shear wall, and the square open steel pipe 2 wraps the ends of the multiple vertically arranged grids 1 to form the edge components of the shear wall; the concrete 3 is poured to wrap the entire fiber composite material grid 1 to form a high-bending performance concrete shear wall structure.

[0022] The reinforcement includes a fiber composite material grid and a square open steel pipe; the fiber composite material grid is arranged vertically according to the design spacing according to the bending performance requirements of the shear wall, and its unique grid form realizes a unified replacement of the horizontal distribution bars and vertical distribution bars of the traditional reinforced concrete shear wall, and the grids are formed by tie bars to form a skeleton; the square open steel pipe is arranged at the ends of both sides of the shear wall, and the steel pipe openings wrap the two ends of the grid inwardly; the present invention utilizes the fiber composite material in the form of an integrated grid to enhance the overall stress characteristics of the structure, and the unique structural form of the grid can also simplify the construction process of the shear wall; the present invention utilizes the high-strength characteristics of the fiber composite material grid and the special structure of the end to improve the bending performance of the concrete shear wall.

[0023] Furthermore, the fiber composite material grid may be of variable type, including one of glass fiber, carbon fiber, basalt fiber, aramid fiber and other composite material grids.

[0024] Furthermore, the fiber composite material grid is formed by overlapping and gluing longitudinal fibers and transverse fibers in an interlaced manner, and has overall force-bearing characteristics.

[0025] Furthermore, the fiber composite material grid can replace the horizontal distribution steel bars and vertical distribution steel bars in the traditional reinforced concrete shear wall to form an integrated structure.

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] like Figure 1 , Figure 2As shown, a high shear performance concrete shear wall structure configured with a fiber composite material grid includes a fiber composite material grid 1, a square open steel pipe 2, concrete 3 and tie bars 4; the fiber composite material grid 1 is arranged in multiple layers vertically according to the designed spacing (for the convenience of representation, only two layers of grid bars are shown in the figure), replacing the horizontal distribution bars and vertical distribution bars of the conventional concrete shear wall, and is tied by the tie bars 4 to form an internal skeleton; the square open steel pipe 2 is arranged at both ends of the shear wall, with the opening facing inward, wrapping the ends of the vertically arranged fiber composite material grid 1; the concrete 3 is cast as a whole after the internal skeleton is formed. The fiber composite material grid 1 is formed as a whole by the cross-intersecting transverse fiber bars and longitudinal fiber bars to form a grid structure, replacing the horizontal distribution steel bars and vertical distribution steel bars in the conventional concrete shear wall. The vertical fibers of the fiber composite material grid 1 provide the bending resistance of the component, and the horizontal fibers of the fiber composite material grid 1 provide the shear resistance;

[0028] The tie bars 4 are metal tie bars or fiber tie bands. The tie bars 4 are steel bars with a diameter greater than 6 mm, and are connected to the fiber composite material grid by steel wires.

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

[0030] The concrete shear wall structure is formed by integral casting. First, a fiber composite material grid skeleton is formed inside, and then concrete is cast to complete the shear wall. The shear wall has good earthquake resistance.

[0031] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high bending performance concrete shear wall structure, characterized by: The invention comprises a fiber composite material grid (1), a square open steel pipe (2), concrete (3) and tie bars (4); a plurality of fiber composite material grids (1) are arranged vertically in a shear wall and are connected by tie bars (4); the square open steel pipe (2) is arranged at the ends of both sides of the shear wall, and the square open steel pipe (2) wraps the ends of the plurality of vertically arranged grids (1) to form edge components of the shear wall; and concrete (3) is poured to wrap the entire fiber composite material grid (1) to form a concrete shear wall structure with high bending resistance.

2. A high bending performance concrete shear wall structure according to claim 1, characterized in that: The fiber composite material grid (1) is formed into a grid structure by overlapping and gluing longitudinal fibers and transverse fibers in an interlaced manner, and has good anchoring performance.

3. A high bending performance concrete shear wall structure according to claim 2, characterized in that: The fiber composite material grid (1) is glass fiber, carbon fiber, basalt fiber or aramid fiber.

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

5. The high bending performance 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. A high bending performance concrete shear wall structure according to claim 5, characterized in that: The wall thickness of the square open steel tube (2) is greater than 0.5 mm, and the material is steel material, preferably stainless steel and steel material with good deformation performance, and the tensile strength is greater than 400 MPa.

7. The high bending performance concrete shear wall structure according to claim 1, characterized in that: The tie bars (4) are metal tie bars or fiber tie belts.

8. A high bending performance concrete shear wall structure according to claim 7, characterized in that: The tie bars (4) are steel bars with a diameter greater than 6 mm and are connected to the fiber composite material grid via steel wires.

9. A high bending performance 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 material grid skeleton is formed inside, and then concrete is cast to complete the shear wall. The shear wall has good earthquake resistance.

Images