CN110331799A - The trapezoidal corrugated plating shear wall of Low Yield Point Steel - Google Patents

Abstract

The invention provides a low yield point steel trapezoidal corrugated plate shear wall, the low yield point steel trapezoidal corrugated plate is used as the main body of the shear wall, the low yield point steel trapezoidal corrugated plate is vertically arranged, and the two ends of the low yield point steel trapezoidal corrugated plate are fixed There are vertical columns; the columns include steel pipes, and concrete is poured into the steel pipes. A crossbeam is fixedly connected between the top and the bottom of the columns at both ends, and the crossbeam is fixedly connected with the top of the low yield point steel trapezoidal corrugated plate. The invention makes full use of the reasonable structural features of the trapezoidal corrugated plate, and combines the good plastic deformation performance of steel with a new material low yield point, which can not only prevent out-of-plane deformation of the steel plate shear wall under normal use conditions, but also ensure It plays its due role under the action of earthquakes. Using concrete-filled steel tubes as frame columns makes full use of the compressive properties of concrete, making steel tubes less prone to instability and improving the ultimate bearing capacity of columns, and steel tubes and steel plate shear walls are easier to weld.

Description

Low yield point steel trapezoidal corrugated plate shear wall

technical field

The invention belongs to the technical field of building anti-seismic technology, and in particular relates to a low yield point steel trapezoidal corrugated plate shear wall.

Background technique

The steel plate shear wall is a structural system based on a steel frame with embedded steel plates. It is mainly used to resist the interstory shear force and overturning moment generated by lateral forces such as wind or lateral seismic force, and can effectively control the horizontal lateral movement of the structure. The steel plate shear wall itself only bears the horizontal action and provides part of the shear stiffness for the lateral stiffness of the entire structural system. The vertical force is completely borne by the surrounding frame columns, and the steel frame bears part of the overturning moment and part Horizontal shear force, in the thrust stiffness of the entire structural system, the steel frame provides part of the shear stiffness and all of the overall bending stiffness, and the steel plate shear wall structure is an ideal lateral force component.

The rapid development of steel plate shear wall technology has greatly promoted the progress of anti-seismic technology for building structural systems. The application of steel plate shear wall technology is also being promoted and innovated continuously. New theories, new technologies, new processes, and new materials are constantly being adopted to improve the structure and performance. In terms of materials, the application of low yield point steel has become a new trend; in terms of structural forms, the application of steel-concrete composite structures is also gradually expanding. Comprehensive application of new research results in structure, materials, technology, etc. is the only way to continuously optimize and innovate the design of steel plate shear walls.

The existing low-yield point steel plate shear wall is generally a frame composed of I-section steel columns and steel beams. The low-yield point steel plate and the frame are welded to form a whole, and if necessary, oblique cross or cross cross stiffeners are arranged on the steel plate surface. Low yield point steel has lower yield strength and tensile strength than other structural parts, and the fluctuation range of yield point is very narrow, which has good low cycle fatigue resistance. The shear wall structure is simple, easy to manufacture and install, but due to the low yield strength of the plate, the lateral stiffness is lower than that of the ordinary steel plate shear wall structure under the same thickness, and it enters the yield state earlier; at the same time, there are thin steel plates The general problem of shear walls, that is, the buckling of steel plates will cause serious out-of-plane deformation and produce loud noises, which may affect the requirements of building comfort and use function.

The trapezoidal corrugated plate shear wall is a structural member with superior shear resistance developed based on the flat steel plate shear wall. , so as to improve the buckling capacity of the wall and help to enhance the lateral stiffness of the structure under horizontal loads. An existing shear wall structure of trapezoidal corrugated plates includes through holes, flange plates, trapezoidal corrugated plates, perforated plates, through steel bars, a concrete top plate, and a bottom plate. In terms of materials, the existing scheme still uses ordinary steel to make the trapezoidal corrugated plate, which does not maximize the plastic deformation capacity of the steel plate, and the effect of absorbing energy under the action of an earthquake is not significant, and its hysteresis capacity still has room for improvement. Concrete is mostly used in beam-column frames, and complex shear connectors are required between corrugated steel plates and concrete, and concrete columns have poor bending resistance and are prone to brittle failure.

Contents of the invention

In order to prevent the out-of-plane buckling of general thin steel under normal use conditions, and to make the steel plate have sufficient shear plastic deformation under earthquake action, so as to absorb and consume earthquake energy as much as possible, the present invention provides a low yield point steel Trapezoidal corrugated plate shear walls.

The specific technical solutions are:

The low yield point steel trapezoidal corrugated plate shear wall, including the low yield point steel trapezoidal corrugated plate made of low yield point steel LY160, the low yield point steel trapezoidal corrugated plate is used as the main body of the shear wall, and the trapezoidal corrugated plate is vertically arranged. The two ends of the low-yield-point steel trapezoidal corrugated plate are fixed with vertical concrete-filled steel tube columns; the concrete-filled steel tube columns include steel tubes made of ordinary Q345 material outsourcing, and concrete is poured into the steel tubes; the concrete-filled steel tube columns on both sides are connected to the top It is welded to the I-shaped beam at the bottom to form a closed frame, and the lower flange of the beam is welded to the top of the low yield point steel trapezoidal corrugated plate;

The beam is I-beam.

The invention makes full use of the reasonable structural features of the trapezoidal corrugated plate, and combines the good plastic deformation performance of steel with a new material low yield point, which can not only prevent out-of-plane deformation of the steel plate shear wall under normal use conditions, but also ensure It plays its due role under the action of earthquakes. The use of concrete filled steel pipe as the frame column makes full use of the compressive performance of concrete, which also makes the steel pipe less prone to instability and improves the ultimate bearing capacity of the column; moreover, the steel pipe and the steel plate shear wall are easier to weld.

Compared with prior art, the technical effect that the present invention has is:

1. Use steel plate with low yield point as the shear wall, and use its large plastic deformation to make the building structure absorb and dissipate the seismic energy as much as possible under the action of the earthquake, and protect the main stressed components

2. The trapezoidal corrugated member is used as the main structural form of the shear wall, which increases the out-of-plane rigidity of the steel plate and solves the out-of-plane buckling deformation of ordinary steel plates during normal use

3. The frame column adopts the steel pipe concrete structure. The confinement of the steel pipe to the core concrete improves the strength and plasticity of the concrete; the inner filling of concrete increases the local rigidity of the steel pipe, making it less likely to lose stability when bearing load.

4. The steel pipe concrete column and the I-section steel beam form a frame, which is convenient for reliable welding with the shear wall, and avoids the complicated shear key connection form of the traditional concrete frame and the steel plate shear wall.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

The specific technical solutions and features of the present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the low yield point steel trapezoidal corrugated plate shear wall includes the low yield point steel trapezoidal corrugated plate 1 made of low yield point steel LY160, and the low yield point steel trapezoidal corrugated plate 1 is used as the main body of the shear wall. The corrugated plate 1 is vertically arranged, and it is characterized in that the two ends of the low yield point steel trapezoidal corrugated plate 1 are fixed with vertical concrete-filled steel pipe columns; Concrete 4 is poured into the steel pipe 2; the steel pipe concrete columns on both sides are welded to the top and bottom I-shaped beams 3 to form a closed frame, and the lower flange of the beam 3 is connected to the top of the low yield point steel trapezoidal corrugated plate 1 Solder connection;

The crossbeam 3 is I-beam.

The present invention adopts the low yield point steel trapezoidal corrugated plate 1 as the basic form of the shear wall, and its material uses low yield point steel. Due to the folds on the surface of the trapezoidal corrugated plate, the out-of-plane rigidity is greater than that of ordinary thin steel plates, which can effectively prevent the out-of-plane buckling of the steel plate; the steel with low yield point has large yield deformation, and has good hysteresis performance under earthquake action, replacing the main load-bearing Structural columns and beams withstand the reciprocating loads of earthquakes, effectively absorb seismic energy, and protect the main stressed structures.

The column adopts steel pipe concrete column, which is composed of steel pipe 2 and concrete 4, and the material of steel pipe 2 is ordinary steel. Due to the existence of the steel pipe 2, the concrete 4 is in a three-dimensional compression state, giving full play to its good compressive performance; the ductility of the steel pipe makes the concrete column less prone to brittle fracture; the core filling concrete increases the axial stiffness of the steel pipe, making it in It is not easy to lose stability under pressure.

The beam 3 adopts a general I-section steel beam, and adopts general steel. Compared with concrete filled steel tube columns, the steel beams are less rigid, and their main function is to form a frame with the columns, and connect the corrugated steel plate shear walls to form an overall force-bearing structure. Comply with the principle of "strong column weak beam" in seismic design

Concrete-filled steel tube columns, beams 3 and low-yield-point steel trapezoidal corrugated plates 1 are welded, and attention should be paid to reserving welding holes at intersections of welds.

Claims (2)

1. the trapezoidal corrugated plating shear wall of Low Yield Point Steel, including the low-yield steel ladder for using low-yield steel LY160 to manufacture Shape corrugated plating (1), the trapezoidal corrugated plating of Low Yield Point Steel (1) are used as shear wall main body, and trapezoidal corrugated plating (1) is vertically arranged, special Sign is that the both ends of the trapezoidal corrugated plating of the Low Yield Point Steel (1) are fixed with vertical steel core concrete column；The steel pipe Concrete column includes the steel pipe (2) of 345 material of outsourcing common Q, has poured concrete (4) in the steel pipe (2)；The steel of two sides Pipe concrete column and the I-shaped crossbeam (3) of top and bottom are welded to connect, and form closure frame, the crossbeam (3) bottom wing It is welded to connect at the top of edge and the trapezoidal corrugated plating of Low Yield Point Steel (1).

2. the trapezoidal corrugated plating shear wall of Low Yield Point Steel according to claim 1, which is characterized in that the crossbeam (3) For I-steel.