CN103397721B - Steel plate precast concrete double-plate shear wall - Google Patents

Abstract

The invention discloses a steel plate prefabricated concrete double-slab shear wall, which comprises a steel plate, an anti-slip key, section steel, a prefabricated concrete wall piece, a cavity and truss reinforcement, and the steel plate is placed between two prefabricated concrete wall pieces At the center position, the four sides of the steel plate are respectively welded with the steel plate in the end column and the steel plate or steel in the beam. Anti-slip keys are set on the steel plates. Concrete is poured into the cavity in the shear wall and the section steel. The shear wall of the present invention has a simple structure, which not only solves the problem of insufficient connection of the upper and lower walls, but also enhances the overall performance of the overlapping part of the walls.

Description

Steel plate precast concrete double-slab shear wall

technical field

The invention belongs to the field of building structures and relates to a steel plate prefabricated concrete double-slab shear wall.

Background technique

As my country's construction industrialization process continues to advance, the country vigorously advocates prefabricated buildings. The precast concrete double-slab shear wall is a new structural form imported from Germany. It has been used in Germany for nearly 20 years and has met the requirements of standardized design, industrial production and assembly construction. Germany is a low-earthquake country and the structure did not take into account the seismic requirements. However, earthquakes occur frequently in my country, so the structure must be improved before it can be widely promoted in China.

The following problems mainly exist in the application of precast concrete double-slab shear walls: 1. After the hoisting is completed, when the cavity concrete is poured, especially when self-compacting concrete is used, the precast wall panels on both sides will have cracks due to insufficient connection, or even be biased. 2. There is not enough connection between the upper and lower walls, which is prone to large lateral displacement; 3. The overall performance of the superimposed surface of the double-slab shear wall is weaker than that of the all-cast-in-place shear wall; 4. The construction of the edge components is complicated, which prolongs the construction period.

Due to the existence of the above problems, the popularization and application of the prefabricated concrete double-slab shear wall structure in China has been hindered.

Contents of the invention

The invention proposes a steel plate prefabricated concrete double-slab shear wall, which can enhance the overall performance between superimposed surfaces, reduce the construction difficulty of edge components, and can also strengthen the connection between the upper and lower layers, so that the force is more reasonable and the structure is more reliable.

The technical solution adopted in the present invention is: a steel plate prefabricated concrete double-slab shear wall, including steel plate, anti-slip key, section steel, prefabricated concrete wall piece, cavity and truss reinforcement, and the steel plate is placed on two pieces of prefabricated concrete wall The four sides of the steel plate are respectively welded with the steel plate in the end column and the steel plate or steel in the beam, and the anti-slip key is arranged on the steel plate, and the truss steel bar and the anti-slip key connected as a whole, the cavity in the shear wall and the section steel are poured with concrete.

In order to make the structural rigidity more reasonable and reduce the amount of steel used, holes can be made at any position of the steel plate, which can also enhance the bond between the steel plate and concrete, and the integrity is better. If the connection between the wall pieces on both sides still needs to be strengthened, truss reinforcement can be placed at the opening.

Preferably, studs, steel bars, channel steel or steel rings can be welded on the steel plate as anti-slip keys. Welded anti-slip keys can be arranged symmetrically in multiple rows, or in an asymmetrical form. The anti-slip keys ensure adequate anchorage in the precast concrete wall panels on both sides, taking into account the precast partial concrete cover.

Preferably, the thickness of the steel plate is between 6mm and 20mm. The concrete is self-compacting concrete or ordinary concrete.

Preferably, the section steel in the concealed column adopts a closed section, and a round steel pipe, a square steel pipe or a rectangular steel pipe is selected. The diameter of the round steel pipe is between 50mm and 158mm, and the side length of the square steel pipe or rectangular steel pipe is between 50mm and 160mm.

The reason why the present invention selects the closed-section section steel is that after the steel plate and the section steel are welded, the stirrup cannot be added in the concealed column due to the limitation of the position of the steel plate. The closed section has a restraining effect on the concrete, thus ensuring the performance of the structure.

Beneficial effects of the present invention:

1. The truss reinforcement and the steel plate welded with anti-slip keys can ensure the overall performance of the superimposed surface of the precast concrete double-slab shear wall and improve its collaborative work ability;

2. The steel plate is welded with the inner steel plate or section steel of the upper and lower beams, which can strengthen the connection between the upper and lower floors, prevent slippage, and ensure the overall performance of the building.

3. Welding of the steel plate and the inner section steel of the concealed column can simplify the construction difficulty of the edge components and ensure the seismic performance of the structure.

Description of drawings

Fig. 1 is the horizontal sectional view of shear wall of the present invention.

Fig. 2 is a schematic diagram of the opening of the steel plate in the invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figures 1 and 2, the prefabricated concrete wall pieces 5 on both sides are connected to the steel plate 1 as a whole through the truss steel bar 4 and the shear key 3 welded on the steel plate 1 . The size of the steel plate 1 is greater than that of the prefabricated concrete wall piece 5, and all extend out of the prefabricated concrete wall piece 5, which is convenient for welding during hoisting. A hole 7 is provided on the surface of the steel plate 1, which can enhance the bond between the steel plate and concrete, and reduce the amount of steel used. The section steel 2 has been completed at the same time as the lower structure on site, and the edge components of the wall are molded on site and the cavity 6 is cast-in-situ. After the wall is in place, the steel plate 1 is welded with the steel plate or section steel in the beam, and the section steel 2 of the edge member. Next, the formwork is set up at the edge members, and then the concrete is poured, and self-compacting concrete is preferred.

It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (1)

1. the two plate shear wall of steel plate precast concrete, it is characterized in that: comprise shaped steel, pre-cast concrete walling sheet, cavity and truss bars in steel plate, resistant slide key, newel post, described steel plate is placed in the center between two panels pre-cast concrete walling sheet, steel plate four limit is welded with shaped steel in steel plate in shaped steel in newel post and beam or beam respectively, steel plate is provided with resistant slide key, entirety is connected into by truss bars and resistant slide key, concreting in the cavity in described shear wall and shaped steel between described pre-cast concrete walling sheet and steel plate;

Described surface of steel plate opening holes;

Truss bars is placed at described hole;

Described steel plate thickness is between 6 ~ 20mm;

Described resistant slide key is peg, reinforcing bar, channel-section steel or steel loop;

The many rows of described resistant slide key are symmetrically welded in steel plate or many rows are asymmetric is welded in steel plate;

Described concrete is self-compacting concrete or ordinary concrete;

In described newel post, shaped steel adopts closed cross-section, selects round steel pipe, square steel pipe or rectangular steel pipe;

Described round steel pipe diameter is between 50 ~ 158mm, and square steel pipe or the rectangular steel pipe length of side are between 50 ~ 160mm.