CN103835399A - Prestress embedded steel plate-concrete combined shear wall - Google Patents

Abstract

A prestressed embedded steel plate-concrete composite shear wall belongs to the technical field of structural engineering. The invention includes embedded steel plates, externally hung concrete plates, prestressed rods, connecting ear plates, brackets, edge components, frame beams and frame columns. The externally hung concrete slab is hung on both sides of the embedded steel plate by prefabricated concrete slab, and is connected with ordinary bolts; the prestressed member is connected with the connecting ear plate; the prestressed member and the connecting ear plate are arranged symmetrically on both sides of the embedded steel plate; vertical The edge member and the horizontal edge member are connected by welding; the connecting lugs are arranged symmetrically on the flange of the frame beam and welded to the frame beam; the horizontal edge member is welded or bolted to the frame beam; the bracket is welded to the vertical edge member and connected to the embedded steel plate The external concrete slab is connected with ordinary bolts; the frame beam and frame column are welded or bolted or bolted and welded. The invention has the characteristics of good seismic performance, high ductility, full energy consumption hysteresis loop and the like.

Description

A Prestressed Embedded Steel Plate-Concrete Composite Shear Wall

technical field

The invention relates to a novel prestressed embedded steel plate-concrete composite shear wall, which belongs to the technical field of structural engineering. the

Background technique

At present, there are more than 20 buildings in the world that use steel plate shear walls as the main anti-lateral force components, and they are mainly distributed in areas with high seismic intensity such as North America and Japan. Since Japan Steel Corporation applied steel plate shear walls to buildings in 1970, the steel plate shear walls have been developed for more than 40 years. The steel plate shear wall structural system consists of embedded steel plates and edge members, and the edge members include edge beams and edge columns. Embedded steel plates are usually connected with edge members to form a lateral force resistant structural system, which can be regarded as a cantilever beam fixed on the ground. the

According to the thickness of the embedded steel plate, the steel plate shear wall can be divided into thick steel plate shear wall and thin steel plate shear wall; according to whether the steel plate surface is ribbed, the steel plate shear wall can be divided into stiffened steel plate shear wall and non-stiffened rib Steel plate shear wall; according to whether the steel plate surface is slit, the steel plate shear wall can be divided into slit steel plate shear wall and non-slit steel plate shear wall; according to whether the steel plate side is arranged with concrete slab, the steel plate shear wall can be divided into steel plate shear wall ‐Concrete composite shear walls and ordinary steel plate shear walls. Although the thin steel plate shear wall has good economic benefits, it is more prone to buckling. Most other forms of steel plate shear walls aim to prevent the out-of-plane deformation of the steel plate, and keep the steel plate working in the plane as much as possible to consume more energy. the

my country's "Technical Regulations for Steel Structures in High-Rise Civil Buildings" JGJ99-98 stipulates that in order to prevent shear buckling of steel plate shear walls, the shear buckling capacity of the steel plate should be used as its ultimate bearing capacity, or by stiffening the steel plate to It does not buckle until it yields. In fact, the above two methods are conservative and costly, which is not conducive to the development and application of steel plate shear walls. With the in-depth research on steel plate shear walls at home and abroad, the performance of steel plate shear walls after buckling has been widely concerned. After buckling, steel plate shear walls still have high bearing capacity, good ductility and stable energy dissipation. ability. Making full use of the post-buckling strength of the steel plate shear wall can not only obtain good seismic performance of the structure, but also significantly reduce the amount of steel used, reduce the cost, and improve economic benefits. the

Contents of the invention

The present invention proposes a new type of prestressed embedded steel plate-concrete composite shear wall. The out-of-plane stability and ultimate bearing capacity of the force wall give full play to the advantages of steel. the

For a thin steel plate shear wall without prestressed members, when the load acts in one direction, the steel plate buckles and forms a tension band, accompanied by large out-of-plane deformation; when the external load acts in the opposite direction, the original tension band It will be reversely compressed and will no longer provide stiffness; at the same time, the original compression area will transition into a tension zone, but due to a large buckling deformation under the upper load, some deformation is stretched to "flat" process until the formation of the reverse tension band. In this process, the steel plate cannot bear the load, and the structure only relies on the beams and columns to bear the external load. In this way, the tension field anchored on the frame will generate a large additional bending moment on the side columns, which increases the stability of the columns. Therefore, the setting of prestressed rods, on the one hand, limits the large out-of-plane deformation of the steel plate after buckling, and provides lateral constraints; on the other hand, when the load acts in reverse, the prestressed rods can withstand the external load, Avoid burdening the columns. Moreover, the steel plate wall is only connected with the frame beam, which avoids the defect that the four-sided steel plate wall cannot be opened, so it can be well used as a lateral force-resistant component in multi-story steel structures. the

The traditional steel plate shear wall controls the out-of-plane stability of the steel plate shear wall by setting stiffeners on the steel plate, which is a passive control method. The present invention actively applies prestress on the shear wall to control the shear wall It is stable outside the plane, and at the same time, the prestressed cable or prestressed tie rod can bear a certain tension in the direction of the tension band of the steel plate shear wall, which belongs to the active control method. And the shear wall is only connected with the structural beams, so as to avoid increasing the burden of the structural columns. All components of the invention can be processed in a factory and then assembled on the spot, the construction is simple, the cost is reduced, and it is suitable for fabricated steel structures. the

When the pure steel plate wall is under a relatively small load, the thin steel plate will buckle locally, resulting in a large in-plane deformation, so the hysteresis curve shows obvious pinching phenomenon, and the energy dissipation capacity of the steel plate cannot be fully utilized. The combined shear wall with embedded steel plate and external concrete slab covers the concrete slab on both sides of the steel plate. The two materials are connected by bolts, and the concrete wall plate is used to prevent out-of-plane buckling of the steel plate. Thermal insulation, sound insulation, etc., which can greatly reduce costs. The external concrete slab and the steel plate wall are connected together by ordinary bolts. This structure can not only ensure the restraint of the concrete slab on the steel plate and the overall performance of the wall, but also greatly reduce the welding workload on site and improve construction efficiency. Therefore, the setting of the concrete slab ensures the out-of-plane stability of the steel plate wall, enables the wall to fully exert its shear bearing capacity, reduces the follow-up workload, and reduces the project cost. the

The prestressed embedded steel plate-concrete composite shear wall proposed by the present invention is characterized in that it includes an embedded steel plate 1, an externally hung concrete plate 2, a prestressed rod 3, a connecting ear plate 4, a bracket 5, an edge member, and a frame Beams 8 and frame columns 9. The embedded steel plate 1 adopts a thin steel plate with a thickness of 5-10mm; the external concrete plate 2 adopts a prefabricated concrete plate; the prestressed rod 3 adopts a prestressed cable or a prestressed tie rod; For fixing the end lugs of prestressed cables or prestressed rods; the edge members are vertical edge members 6 and horizontal edge members 7, the vertical edge members 6 are double-leg T-shaped steel, and the horizontal edge members 7 It is a double-angle steel placed in parallel, and the distance between the two limbs of the T-shaped steel is reserved between the double-angle steel; the concrete slab 2 adopts a prefabricated concrete slab to hang on both sides of the embedded steel plate 1; the embedded steel plate 1 is connected to the vertical edge member 6, and the embedded steel plate 1 is connected to the horizontal edge member 7; both ends of the prestressed rod 3 are fixed to the connecting ear plate 4; the connecting ear plate 4 is connected to the vertical edge member 6 , the connecting ear plate 4 is connected with the frame beam 8; the bracket 5 is connected with the vertical edge member 6, and is connected with the embedded steel plate 1 and the external concrete plate 2 by bolts; the vertical edge member 6 and the horizontal edge Components 7 are connected; the horizontal edge component 7 is connected to the frame beam 8; the frame beam 8 is connected to the frame column 9; the prestressed rod 3, the connecting ear plate 4, the bracket 5 are arranged symmetrically on both sides of the embedded steel plate 1 . the

In the above-mentioned prestressed embedded steel plate-concrete composite shear wall, the embedded steel plate 1 is connected to the vertical edge member 6 by bolts, and the embedded steel plate 1 is connected to the horizontal edge member 7 by bolts. the

In the above-mentioned prestressed embedded steel plate-concrete composite shear wall, the externally hung concrete slab 2 is externally hung on both sides of the embedded steel plate 1 by a prefabricated concrete slab and connected by bolts. the

In the above prestressed embedded steel plate-concrete composite shear wall, the vertical edge member 6 and the horizontal edge member 7 are welded. the

In the above prestressed embedded steel plate-concrete composite shear wall, the bracket 5 is welded to the vertical edge member 6 and bolted to the embedded steel plate 1 and the external concrete plate 2 . the

In the above-mentioned prestressed embedded steel plate-concrete composite shear wall, the connecting lugs 4 are symmetrically arranged on the flange of the frame beam 8, and are welded with the frame beam 8, and the connecting lugs 4 are welded with the vertical edge member 6 . the

In the above prestressed embedded steel plate-concrete composite shear wall, the horizontal edge member 7 is welded or bolted to the frame beam 8 . the

In the above prestressed embedded steel plate-concrete composite shear wall, the frame beam 8 and the frame column 9 are welded or bolted or bolted and welded. the

The invention can effectively limit the out-of-plane deformation of the steel plate wall by setting prestressed rods at four corners of the traditional thin steel plate shear wall, and improve the lateral rigidity, energy consumption and ductility of the steel plate wall. The traditional steel plate shear wall controls the out-of-plane stability of the steel plate shear wall by setting stiffeners on the steel plate, which is a passive control method. The present invention actively applies prestress on the steel plate shear wall to control the steel plate shear force The wall is stable outside the plane. At the same time, the prestressed cables or prestressed rods can bear a certain tension in the direction of the tension band of the steel plate shear wall, which belongs to the active control method. In addition, the steel plate shear wall is only connected with the structural beam, so as to avoid increasing the burden of the structural column. All components of the invention can be processed in a factory and then assembled on the spot, the construction is simple, the cost is reduced, and it is suitable for fabricated steel structures. the

The prestressed embedded steel plate-concrete composite shear wall provided by the invention is a new type of lateral force-resisting component for high-rise building steel structures or other structures. the

Description of drawings:

Fig. 1 is a structural schematic diagram of the prestressed embedded steel plate-concrete composite shear wall of the present invention. the

Fig. 2 is an exploded view of the prestressed embedded steel plate-concrete composite shear wall unit of the present invention. the

Detailed ways:

The present invention is described in detail below in conjunction with accompanying drawing:

As shown in Figures 1 and 2, 1—embedded steel plate, 2—external concrete slab, 3—prestressed member, 4—connecting ear plate, 5—bracket, 6—vertical edge member, 7—horizontal edge member, 8—frame beam, 9—frame column. the

The prestressed embedded steel plate-concrete composite shear wall includes an embedded steel plate 1, an external concrete plate 2, a prestressed member 3, a connecting ear plate 4, a bracket 5, an edge member, a frame beam 8 and a frame column 9. The embedded steel plate 1 adopts a thin steel plate with a thickness of 5-10mm; the external concrete plate 2 adopts a prefabricated concrete plate; the prestressed rod 3 adopts a prestressed cable or a prestressed tie rod; For fixing the end lugs of prestressed cables or prestressed rods; the edge members are vertical edge members 6 and horizontal edge members 7, the vertical edge members 6 are double-leg T-shaped steel, and the horizontal edge members 7 It is a double-angle steel placed in parallel, and the distance between the two limbs of the T-shaped steel is reserved between the double-angle steel; the concrete slab 2 adopts a prefabricated concrete slab to hang on both sides of the embedded steel plate 1; the embedded steel plate 1 is connected to the vertical edge member 6, and the embedded steel plate 1 is connected to the horizontal edge member 7; both ends of the prestressed rod 3 are fixed to the connecting ear plate 4; the connecting ear plate 4 is connected to the vertical edge member 6 , the connecting ear plate 4 is connected with the frame beam 8; the bracket 5 is connected with the vertical edge member 6, and is connected with the embedded steel plate 1 and the external concrete plate 2 by bolts; the vertical edge member 6 and the horizontal edge Components 7 are connected; the horizontal edge component 7 is connected to the frame beam 8; the frame beam 8 is connected to the frame column 9; the prestressed rod 3, the connecting ear plate 4, the bracket 5 are arranged symmetrically on both sides of the embedded steel plate 1 . the

In the above-mentioned prestressed embedded steel plate-concrete composite shear wall, the embedded steel plate 1 is connected to the vertical edge member 6 by bolts, and the embedded steel plate 1 is connected to the horizontal edge member 7 by bolts. The externally hung concrete slab 2 is externally hung on both sides of the embedded steel plate 1 by a prefabricated concrete slab, and is connected by bolts. The vertical edge member 6 and the horizontal edge member 7 are welded. The bracket 5 is welded to the vertical edge member 6 and bolted to the embedded steel plate 1 and the external concrete plate 2 . The connecting lugs 4 are arranged symmetrically on the flange of the frame beam 8 , and are welded with the frame beam 8 , and the connecting lugs 4 are welded with the vertical edge member 6 . The horizontal edge member 7 is welded or bolted to the frame beam 8 . The frame beam 8 and the frame column 9 are welded or bolted or bolted and welded. the

The out-of-plane stiffness of the prestressed embedded steel plate-concrete composite shear wall is very large, which can effectively control the out-of-plane deformation during transportation, installation and use, and keep the steel plate stable and safe. the

The prestressed embedded steel plate-concrete composite shear wall proposed by the present invention is an improvement to the traditional flat steel plate shear wall. The prestressed structure is applied to it, and the out-of-plane stability of the steel plate is controlled by an active control method, which improves the traditional The defect that the steel plate shear wall is easy to buckle improves the lateral resistance of the steel plate shear wall. All the components of the present invention can be processed and installed in the factory, and then transported to the construction site for assembly, which saves manpower and material resources and reduces the cost. the

Claims (8)

1. the embedded steel plate-concrete combined shear wall of prestressing force, it is characterized in that, comprise embedded steel plate (1), plug-in concrete slab (2), prestress element (3), connect otic placode (4), bracket (5), edge member, Vierendeel girder (8) and frame column (9).Described embedded steel plate (1) adopts the steel sheet that thickness is 5-10mm; Described plug-in concrete slab (2) adopts precast concrete plank; Described prestress element (3) adopts prestressed cable or prestressed draw-bar; Described connection otic placode (4) is the end otic placode of fixing prestressed cable or prestressed draw-bar; Described edge member is vertical edge member (6) and horizontal edge member (7), described vertical edge member (6) is two limb T steels, the double angle that described horizontal edge member (7) is parallel placement, and the distance between the two limbs of reserved two limb T steels between double angle; Described concrete slab (2) adopts precast concrete plank to hang over the both sides of embedded steel plate (1) outward; Described embedded steel plate (1) is connected with vertical edge member (6), and embedded steel plate (1) is connected with horizontal edge member (7); Described connection otic placode (4) is fixed at described prestress element (3) two ends; Described connection otic placode (4) is connected with vertical edge member (6), connects otic placode (4) and is connected with Vierendeel girder (8); Described bracket (5) is connected with vertical edge member (6), with bolts with described embedded steel plate (1) and plug-in concrete slab (2); Described vertical edge member (6) is connected with horizontal edge member (7); Described horizontal edge member (7) is connected with described Vierendeel girder (8); Described Vierendeel girder (8) is connected with described frame column (9); Described prestress element (3), described connection otic placode (4), described bracket (5) are arranged in described embedded steel plate (1) bilateral symmetry.

2. the embedded steel plate-concrete combined shear wall of prestressing force according to claim 1, is characterized in that, described embedded steel plate (1) is connected with vertical edge member (6) bolt, embedded steel plate (1) is connected with the bolt of horizontal edge member (7).

3. the embedded steel plate-concrete combined shear wall of prestressing force according to claim 1, is characterized in that, described plug-in concrete slab (2) employing precast concrete plank hangs over the both sides of embedded steel plate (1) outward, with bolts.

4. the embedded steel plate-concrete combined shear wall of prestressing force according to claim 1, is characterized in that, described vertical edge member (6) and described horizontal edge member (7) welding.

5. the embedded steel plate-concrete combined shear wall of prestressing force according to claim 1, is characterized in that, described bracket (5) and described vertical edge member (6) welding, be connected with described embedded steel plate (1) and plug-in concrete slab (2) bolt.

6. the embedded steel plate-concrete combined shear wall of prestressing force according to claim 1, it is characterized in that, described connection otic placode (4) is arranged symmetrically with at described Vierendeel girder (8) position, the edge of a wing, and welds with Vierendeel girder (8), connects otic placode (4) and vertical edge member (6) welding.

7. the embedded steel plate-concrete combined shear wall of prestressing force according to claim 1, is characterized in that, described horizontal edge member (7) is connected with described Vierendeel girder (8) welding or bolt.

8. the embedded steel plate-concrete combined shear wall of prestressing force according to claim 1, is characterized in that, described Vierendeel girder (8) is with described frame column (9) welding or bolt is connected or bolt weldering mixes connection.

Images