CN102661010A - Composite shear wall - Google Patents

Abstract

The invention discloses a combined shear wall, which comprises a masonry wall, peripheral steel strips and steel plate diagonal bracing arranged on both facades of the masonry wall, the peripheral steel strips are arranged along the four sides of the facade of the masonry wall, two-phase The surrounding steel strips on the adjacent sides are connected to form a steel plate frame, and the opposite corners of the steel plate frame are connected by steel plate braces. Pull bolt connection. The combined shear wall of the present invention is suitable for the combined shear wall with existing multi-layer frame structure, which can improve wall ductility, facilitate installation and reduce construction cost.

Description

A composite shear wall

technical field

The invention belongs to the technical field of structural engineering in the civil engineering industry, and relates to a combined shear wall.

Background technique

At present, composite shear walls mainly include steel plate-clad concrete composite shear walls, single-sided steel plate-concrete composite shear walls, composite shear walls with I-shaped steel frames, etc. This type of composite shear wall mainly uses the combination of steel and concrete to make full use of the buckling strength of the steel plate and the compressive strength of the concrete to improve the ductility and energy dissipation capacity of the seismic shear wall. However, the above-mentioned anti-seismic shear walls are mainly used in newly built building structures. For existing buildings, it is often encountered with the addition of storeys or the improvement of seismic design requirements, etc., resulting in that the lateral stiffness of the existing building structure cannot meet the requirements, so a certain number of shear walls need to be added in the reinforcement design.

Based on the site survey results of the 5.12 earthquake in 2008, the infill wall of the frame structure has made a significant contribution to improving the lateral stiffness of the frame structure. X-shaped cracks are prone to occur under the action of horizontal forces, and out-of-plane collapse will occur when the damage is severe.

In addition, as the number of workers engaged in simple manual labor on construction sites in my country has dropped sharply, labor costs have gradually increased. Therefore, it is necessary to develop a new composite shear wall that can not only improve the horizontal resistance bearing capacity of the frame structure, facilitate construction, but also make full use of the existing masonry infill wall.

Contents of the invention

Technical problem: The present invention provides a combined shear wall suitable for existing multi-layer frame structures, which can improve wall ductility, facilitate installation, and reduce construction costs.

Technical solution: The combined shear wall of the present invention includes a masonry wall, peripheral steel strips and steel plate diagonal braces arranged on both facades of the masonry wall, the peripheral steel strips are arranged along the four sides of the masonry wall facade, and the two phases The surrounding steel strips on the adjacent sides are connected to form a steel plate frame, and the opposite corners of the steel plate frame are connected by steel plate braces. Pull bolt connection.

In the present invention, the thickness of the surrounding steel strips and the steel braces is 3-30 mm.

In the present invention, the peripheral steel plate strips and the steel plate braces are connected by welding.

In the present invention, the masonry wall is a filled wall made of ordinary solid or hollow blocks with a thickness of 120-370 mm and bonding materials.

In the present invention, the distance between two adjacent tension bolts is 200-400 times the thickness of the steel plate.

In the present invention, the diameter of the pull bolt is 10-30mm.

Beneficial effect: compared with the prior art, the present invention has the following advantages:

1. The steel plate is a ductile material with high energy dissipation capacity; after the steel plate and the masonry are combined by tension bolts, the masonry wall can effectively improve the buckling strength of the steel plate through lateral restraint, and the steel plate diagonal brace and the surrounding steel belt belts to the masonry The wall forms certain constraints, which can improve the ductility of the wall, and the combination of the two can better increase the ductility and energy dissipation capacity of the shear wall.

2. During construction on site, the composite shear wall of the present invention is connected to the existing frame structure in the building, and the masonry wall in the composite shear wall can be rebuilt or filled with existing masonry. Therefore, in the seismic strengthening reconstruction of multi-storey frame structures, the existing frames and infill walls can be fully utilized.

3. The combined shear wall of the present invention can be assembled at the construction site from the steel plate braces produced in the factory, the surrounding steel strips and the masonry filling wall by welding and tension bolts. Therefore, the entire production process of the composite shear wall involves less wet work and a short construction period, which can reduce the number of laborers and labor costs. The assembly can shorten the construction period.

4. The steel plate braces, surrounding steel strips and pull bolts used are mechanized in the factory, which can realize mechanized batch production, high production efficiency, and reduce noise and environmental pollution on the construction site;

5. The steel plate-masonry composite wall in the present invention has good characteristics of disassembly and reassembly, and conforms to the concept of sustainable development.

Description of drawings

Fig. 1 is the axonometric view of composite shear wall of the present invention;

Fig. 2 is the elevation view of composite shear wall of the present invention;

Fig. 3 is the structural representation that composite shear wall of the present invention is applied to intermediate frame;

Fig. 4 is A-A sectional view among Fig. 2;

Figure 5 is a detailed diagram of the connection between the peripheral steel strip and the steel plate brace;

In the figure, there are: peripheral steel strips 1, steel plate diagonal braces 2, masonry walls 3, pull bolts 4, connecting welds 5, columns 6, and beams 7.

Detailed ways

The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

The composite shear wall of the present invention comprises a masonry wall 3, peripheral steel strips 1 and steel plate braces 2 arranged on both facades of the masonry wall 3, and the peripheral steel strips 1 are arranged along the four sides of the facade of the masonry wall 3 where it is located , the surrounding steel strips 1 on two adjacent sides are connected to form a steel plate frame, and the opposite corners of the steel plate frame are connected by steel plate braces 2, between the peripheral steel strips 1 and between the steel plate braces 2 on both sides of the masonry wall 3 They are all connected by pull bolts 4 passing through masonry walls 3 .

In one embodiment of the present invention, the thickness of the peripheral steel strip 1 and the steel brace 2 is 3-30 mm, and the peripheral steel strip 1 and the steel brace 2 are connected by welding.

In one embodiment of the present invention, the masonry wall 3 is a filled wall made of ordinary solid or hollow blocks with a thickness of 120-370 mm and bonding materials.

In one embodiment of the present invention, the distance between two adjacent tension bolts 4 is 200-400 times the thickness of the steel plate, and the diameter of the tension bolts 4 is 10-30mm.

The peripheral steel strips 1 and steel plate braces 2 of the combined shear wall of the present invention are arranged symmetrically on both sides of the masonry wall 3, wherein the peripheral steel strips 1 are arranged around the masonry wall, and the peripheral steel strips on two adjacent sides 1 is connected to form a steel plate frame, and the steel plate diagonal brace 2 is arranged in an X shape to connect the opposite corners of the steel plate frame.

The combined shear wall of the present invention is connected with the existing frame structure in the building, and the masonry wall 3 can be the existing masonry filling wall in the existing building, or it can be the existing frame built in the building on the construction site Masonry infill walls within the structure. Steel plate braces and surrounding steel strips are assembled by welding and pull bolts and fixed on the masonry wall.

The fabrication and installation steps of the composite shear wall of the present invention comprise:

1. The determination of the horizontal force to be borne by the steel plate-masonry composite shear wall is mainly based on the modeling calculation of the overall structure;

2. Determine the thickness and width of steel plate braces and surrounding steel strips in the steel plate-masonry composite wall, and determine the distance between the tension bolts and the diameter of the screw rod, mainly based on the horizontal force that the shear wall needs to bear in the building and the current relevant specifications The bearing capacity calculation method given in ;

3. Mechanized production of steel plate braces, surrounding steel strips and tension bolts in the factory;

4. Masonry infill walls inside existing steel or reinforced concrete frames in construction site buildings;

5. On both sides of the above-mentioned filling wall or the existing filling wall of the existing building, steel plate diagonal braces and peripheral steel strips are assembled by welding and tension bolts to form a composite shear wall.

The above are only examples of the present invention, and all equivalent structural transformations made using the description and drawings of the present invention, or directly or indirectly used in other related technical fields, are included in the scope of patent protection of the present invention.

Claims (6)

1. A combined shear wall, characterized in that the shear wall comprises a masonry wall (3), peripheral steel strips (1) and steel plate diagonal braces arranged on both facades of the masonry wall (3) (2), the surrounding steel strips (1) are arranged along the four sides of the facade of the masonry wall (3), and the surrounding steel strips (1) on two adjacent sides are connected to form a steel plate frame, and the opposite sides of the steel plate frame The corners are connected by steel plate diagonal braces (2), and between the opposite peripheral steel plate strips (1) on both sides of the masonry wall (3) and between the steel plate diagonal braces (2) are all connected by a pair of tension bars passing through the masonry wall (3). Bolt (4) connection. 2. The composite shear wall according to claim 1, characterized in that, the thickness of the peripheral steel strip (1) and steel plate braces (2) is 3-30 mm. 3. The composite shear wall according to claim 1, characterized in that, the peripheral steel strip (1) and the steel plate diagonal brace (2) are connected by welding. 4. The combined shear wall according to claim 1, characterized in that the masonry wall (3) is a filled wall made of ordinary solid or hollow blocks with a thickness of 120-370 mm and bonding materials. 5. The composite shear wall according to claim 1, characterized in that, the distance between two adjacent pair of pull bolts (4) is 200 to 400 times the thickness of the steel plate. 6. The composite shear wall according to claim 1, characterized in that, the diameter of the tension bolt (4) is 10-30mm.

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