CN203475641U - Bending constraint stiffening rib steel plate shear wall - Google Patents

Abstract

The utility model discloses a buckling-constrained stiffened steel plate shear wall, which belongs to the technical field of structural engineering. The buckling-constrained stiffened steel plate shear wall includes embedded steel plates, reinforced concrete cover plates, edge members, and stiffeners; the edge members include edge beams and edge columns, and the embedded steel plates are fixedly connected to the upper and lower edge beams; the stiffeners are fixed in the inner On both sides of the embedded steel plate, the reinforced concrete cover plate is symmetrically fixed on both sides of the embedded steel plate, and a gap is reserved between the reinforced concrete cover plate, the embedded steel plate and the edge beam. The buckling-constrained stiffened steel plate shear wall can effectively prevent the buckling sound similar to "drumming" and improve the "pinch" phenomenon of the hysteresis curve.

Description

A Buckling Constrained Stiffened Steel Plate Shear Wall

technical field

The utility model relates to the technical field of structural engineering, in particular to a novel lateral-force buckling-restrained stiffened steel plate shear wall that can effectively prevent buckling sounds similar to "drumming" and improve the "pinching" phenomenon of hysteretic curves.

Background technique

Steel plate shear wall is a new type of lateral force resistance structure developed in the 1970s. It has the characteristics of good ductility, large lateral stiffness of the structure, good ductility of components, and excellent seismic performance. In developed countries such as the United States and Japan, it has taken the lead in applying it to practical projects. In recent years, it has also begun to be used in high-intensity areas in my country, such as: Tianjin Tower in Tianjin, Shanghai Jinjiang Hotel and Tianjin International Finance Conference Hotel. Compared with concrete shear walls, steel plate shear walls have the following advantages: 1. Light weight, reducing the cost of the foundation; 2. Higher initial stiffness, effectively controlling lateral stiffness; 3. Better ductility and hysteresis loss 4. The thickness of the steel plate shear wall is thin, which can provide a large building space requirement; 5. It overcomes the shortcomings of cracking and poor ductility of the reinforced concrete shear wall under large earthquakes.

However, the traditional non-stiffened thin steel plate shear wall has two defects during use. One is that the hysteresis curve has a "pinching" phenomenon, which is not conducive to energy consumption; There is a buckling sound similar to "drumming", which makes people feel uncomfortable under small earthquakes or wind loads.

Utility model content

The purpose of the utility model is to provide a new type of lateral force resistant steel plate shear wall which can effectively prevent the buckling sound similar to "drumming" and improve the "pinching" phenomenon of the hysteresis curve.

The utility model implements this purpose through the following technical solutions:

A buckling-constrained stiffened steel plate shear wall, including embedded steel plates, reinforced concrete cover plates, edge members, and stiffeners; the edge members include edge beams and edge columns, and the embedded steel plates are fixedly connected to the upper and lower edge beams; the stiffeners are fixed On both sides of the embedded steel plate, the reinforced concrete cover plate is symmetrically fixed on both sides of the embedded steel plate, and a gap is reserved between the reinforced concrete cover plate, the embedded steel plate and the edge beam.

When the embedded steel plate buckles out-of-plane under the action of shear force, the reinforced concrete cover plate will provide a plane constraint to prevent the embedded steel plate from continuing to buckle, so that the embedded steel plate will not form a "tension field" under the reciprocating shear force, This prevents buckling sounds like "drumming". The out-of-plane restraint stiffness provided by the reinforced concrete cover slab prevents the buckling of the embedded steel plate, improves the lateral stiffness of the embedded steel plate, and improves the "pinch" phenomenon of the hysteretic curve of the steel plate shear wall.

A gap is reserved between the reinforced concrete cover slab and the upper and lower edge beams, which can prevent the large compressive stress of the reinforced concrete cover slab from being damaged due to excessive deformation of the upper and lower edge beams. The reserved gap between the reinforced concrete cover plate and the embedded steel plate can provide a space for the embedded steel plate and the reinforced concrete cover plate to freely deform and consume energy. The size of the reserved gap is preferably 5-10mm.

The stiffeners include vertical stiffeners fixed on both sides of the embedded steel plate, and the number of vertical stiffeners is more than four; each reinforced concrete cover plate is fixed on the same side and between two adjacent vertical stiffeners Between the embedded steel plate. Preferably, the vertical stiffeners are symmetrically fixed on both sides of the embedded steel plate. Under the action of small or moderate earthquakes, the vertical stiffeners can prevent the overall or local buckling of the embedded steel plate.

The number of vertical stiffeners is preferably more than 6. Correspondingly, the number of reinforced concrete cover slabs on the side of the embedded steel plate is not less than two, and the volume of a single reinforced concrete cover slab is reduced, thereby reducing the number of reinforced concrete cover slabs. The probability of cracking during the production, transportation and construction process of the board also makes it difficult to install on site.

The two ends of the reinforced concrete cover plate are fixedly connected to the vertical stiffeners, and the two ends connected to the reinforced concrete cover plate and the vertical stiffeners are fixed with vertical pre-embedded steel plates, and the vertical pre-embedded steel plates are fixed to the vertical stiffeners connected.

The stiffeners include horizontal stiffeners fixed on both sides of the embedded steel plate, the horizontal stiffeners are located above and/or below the reinforced concrete cover, and there is a gap between the horizontal stiffener and the reinforced concrete cover. Preferably, the horizontal stiffeners are symmetrically fixed on both sides of the embedded steel plate.

The steel plate shear wall of the utility model simultaneously utilizes the advantages of stiffeners and reinforced concrete cover plates to improve the performance of the steel plate wall, which not only effectively prevents the buckling sound similar to "drumming", improves the "pinching" phenomenon of the hysteresis curve, but also can Reduce the section size of the stiffener and the thickness of the reinforced concrete cover.

The buckling-constrained stiffened steel plate shear wall can bear the shear bearing capacity of 400KN-4000KN; Local buckling occurs; under the action of a large earthquake, the reinforced concrete cover plate prevents out-of-plane buckling of the embedded steel plate, and can effectively dissipate earthquake energy.

The reinforced concrete cover and stiffeners can not only prevent the elastic buckling of the embedded steel plate, but also improve the shear yield strength, lateral stiffness and ductility of the steel plate shear wall. At the same time, the reinforced concrete cover can also play a role in fire protection. , thermal insulation, sound insulation and other effects.

Description of drawings

Fig. 1 is a structural schematic diagram of Embodiment 1 of a buckling-constrained stiffened steel plate shear wall of the present invention.

Fig. 2 is the A-A sectional view of the buckling-constrained stiffened steel plate shear wall shown in Fig. 1.

Fig. 3 is an exploded schematic diagram of the buckling-constrained stiffened steel plate shear wall shown in Fig. 1 .

Fig. 4 is a structural schematic diagram of the reinforced concrete cover plate in Fig. 1 .

Fig. 5 is an exploded schematic view of Embodiment 2 of the buckling-constrained stiffened steel plate shear wall of the present invention.

Fig. 6 is an exploded schematic view of Embodiment 3 of the buckling-constrained stiffened steel plate shear wall of the present invention.

In the figure: 1-embedded steel plate, 2-reinforced concrete cover, 3-edge beam, 4-edge column, 5-vertical stiffener, 6-vertical embedded steel plate, 7-two-way reinforcement, 8-horizontal Stiffeners.

Detailed ways

Figures 1 to 3 show Embodiment 1 of the buckling-constrained stiffened steel plate shear wall of the present invention.

The buckling-constrained stiffened steel plate shear wall includes an embedded steel plate 1 , a reinforced concrete cover plate 2 , edge members, and eight vertical stiffened ribs 5 . The edge member includes an edge beam 3 and an edge column 4 , and the embedded steel plate 1 is fixedly connected with the upper and lower edge beams 3 , and the embedded steel plate 1 can also be fixedly connected with at least one edge column 4 at the same time. The vertical stiffeners 5 are symmetrically fixed on both sides of the embedded steel plate 1, that is, each side of the embedded steel plate 1 is provided with four vertical stiffeners 5, and each reinforced concrete cover plate 2 is fixed on the same side and adjacent to each other. On the embedded steel plate 1 between the two vertical stiffeners 5. The embedded steel plate 1 is high strength and high ductility steel or low yield point high ductility steel.

A gap is reserved between the reinforced concrete cover plate 2 and the embedded steel plate 1. The reserved gap can provide a space for the embedded steel plate 1 and the reinforced concrete cover plate 2 to freely deform and consume energy. The size of the reserved gap is preferably 5-5. 10mm.

An appropriate gap is reserved between the reinforced concrete cover plate 2 and the edge beam 3 , which can prevent the upper and lower edge beams 3 from being deformed too much and cause the reinforced concrete cover plate 2 to generate relatively large compressive stress and be destroyed.

The left and right ends of the reinforced concrete cover plate 2 are fixed with vertical embedded steel plates 6, and the vertical embedded steel plates 6 are fixedly connected with the vertical stiffeners 5, that is, the reinforced concrete cover plate 2 is connected with the vertical embedded steel plate 6. The vertical stiffeners 5 are fixedly connected. It should be understood that the reinforced concrete cover plate 2 and the vertical stiffener 5 may also be directly fixed and connected by bolts.

Between the embedded steel plate 1 and the edge beam 3, between the embedded steel plate 1 and the vertical stiffener 5, between the vertical embedded steel plate 6 and the vertical stiffener 5 can be welded, bolted or other suitable The method is fixedly connected.

As shown in FIG. 4 , two-way reinforcement 7 is arranged inside the reinforced concrete cover 2 to strengthen the rigidity of the reinforced concrete cover 2 .

Fig. 5 shows the second embodiment of the buckling-constrained stiffened steel plate shear wall of the present invention. The buckling-constrained stiffened steel plate shear wall is basically the same as that in Embodiment 1, except that the buckling-constrained stiffened steel plate shear wall also includes horizontal stiffeners 8 symmetrically fixed on both sides of the embedded steel plate 1, the The horizontal stiffener 8 is located at the upper end of the reinforced concrete cover 2 , and there is a gap between the horizontal stiffener 8 and the reinforced concrete cover 2 .

Fig. 6 shows the third embodiment of the buckling-constrained stiffened steel plate shear wall of the present invention.

The buckling-constrained stiffened steel plate shear wall includes an embedded steel plate 1 , a reinforced concrete cover plate 2 , edge members, and twelve horizontal stiffened ribs 8 . The edge components include edge beams 3 and edge columns 4, and the embedded steel plate 1 is fixedly connected with the upper and lower edge beams 3 and the left and right edge columns 4. The reinforced concrete cover 2 and the horizontal stiffener 8 are symmetrically fixed on both sides of the embedded steel plate 1, the horizontal stiffener 8 is located above and below the reinforced concrete cover 2, and the horizontal stiffener 8 and the reinforced concrete cover 2 are reserved Appropriate clearance. The embedded steel plate 1 is high strength and high ductility steel or low yield point high ductility steel.

The reinforced concrete cover plate 2 is fixed on both sides of the embedded steel plate 1 by bolts, and the reinforced concrete cover plate 2 and the embedded steel plate 1 are provided with a steel gasket (not shown in the figure) with a thickness of 5-10 mm. Steel spacers reserve a gap between the reinforced concrete cover plate 2 and the embedded steel plate 1 .

The above-mentioned embodiments only express three implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (9)

1. A buckling restraint stiffened steel plate shear wall is characterized in that: comprise embedded steel plate, reinforced concrete cover plate, edge member, stiffener; Edge member comprises edge beam, edge column, embedded steel plate and upper and lower two edge beams Fixed and connected; the stiffeners are fixed on both sides of the embedded steel plate, the reinforced concrete cover plate is symmetrically fixed on both sides of the embedded steel plate, and a gap is reserved between the reinforced concrete cover plate, the embedded steel plate and the edge beam. 2. The buckling-constrained stiffened steel plate shear wall according to claim 1, characterized in that: the stiffened ribs include vertical stiffened ribs fixed on both sides of the embedded steel plate, and the number of vertical stiffened ribs is more than four ; Each reinforced concrete cover plate is fixed on the same side and on the embedded steel plate between two adjacent vertical stiffeners. 3. The buckling-constrained stiffened steel plate shear wall according to claim 2, characterized in that: the vertical stiffeners are symmetrically fixed on both sides of the embedded steel plate. 4. The buckling-constrained stiffened steel plate shear wall according to claim 2, characterized in that: the number of said vertical stiffeners is more than 6. 5. The buckling-constrained stiffened steel plate shear wall according to claim 2, characterized in that: the two ends of the reinforced concrete cover plate are fixedly connected with the vertical stiffeners, and the two ends of the reinforced concrete cover plate connected with the vertical stiffeners The end is fixed with a vertical embedded steel plate, and the vertical embedded steel plate is fixedly connected with the vertical stiffener. 6. The buckling-constrained stiffened steel plate shear wall according to claim 1, characterized in that: the stiffened ribs include horizontal stiffened ribs fixed on both sides of the embedded steel plate, and the horizontal stiffened ribs are located above the reinforced concrete cover plate and/or or below, there is a gap between the horizontal stiffener and the reinforced concrete cover. 7. The buckling-constrained stiffened steel plate shear wall according to claim 6, wherein the horizontal stiffened ribs are symmetrically fixed on both sides of the embedded steel plate. 8. The buckling-constrained stiffened steel plate shear wall according to claim 1, wherein the embedded steel plate is fixedly connected with at least one edge column. 9. The buckling-constrained stiffened steel plate shear wall according to any one of claims 1 to 8, characterized in that two-way reinforcement is arranged inside the reinforced concrete cover plate.

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