CN103821260A - Outer pasting steel plate-concrete combined shear wall with pull force supports - Google Patents

Abstract

The invention relates to a novel externally attached steel plate-concrete composite shear wall with tension support and belongs to the technical field of structural engineering. The external steel plate-concrete composite shear wall with tensile support is composed of external steel plate, embedded concrete plate, tensile support, bracket, connecting ear plate, L-shaped connecting plate and edge components; the tensile support provided by the invention External steel plate-concrete composite shear wall is a new type of lateral force-resistant member for high-rise building structures or other structures. It has the characteristics of good seismic performance, high ductility, and full energy-dissipating hysteresis loop. member.

Description

An externally attached steel plate-concrete composite shear wall with tensile support

technical field

The invention relates to a novel externally attached steel plate-concrete composite shear wall with tension support, which belongs to the technical field of structural engineering.

technical background

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.

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 embedded concrete plate, the steel plate shear wall can be divided into It is steel plate-concrete composite shear wall and common steel plate shear wall. 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.

According to appendix 4 of my country's "Technical Regulations for Steel Structures of High-rise Civil Buildings" (JGJ99-98), in order to prevent shear buckling of steel plate shear walls, the shear buckling capacity of steel plates should be used as its ultimate bearing capacity, or by Buckling does not occur until it is stiffened to yield. 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.

Contents of the invention

The present invention proposes a new type of externally attached steel plate-concrete composite shear wall with tensile support. The out-of-plane stability and ultimate bearing capacity of steel plate shear walls give full play to the advantages of steel.

For the thin steel plate shear wall without tensile support, when the load acts, the embedded steel plate buckles and forms a tension band, so that the tension field anchored on the frame will generate a large additional bending moment on the side column, which increases the column's strength. Stable burden. Therefore, the setting of the tensile support can withstand the external load and avoid increasing the burden on the column. The setting of the embedded concrete slab and the externally attached steel plate enables the wall to fully exert its shear bearing capacity. Moreover, the steel plate wall is only connected to the frame beam. Since the wall plate does not have to penetrate the entire beam span, the defect that the four sides of the steel plate wall cannot be opened is avoided, and edge members are set around the four sides, which can reduce the number of wall panels and columns. , the magnitude of the decrease in lateral stiffness and bearing capacity. Therefore, it can be well used as a lateral force-resistant member in multi-story steel structures.

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, and at the same time, the prestressed cable 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 steel plate shear wall is only connected with the frame beam, so as to avoid increasing the burden of the frame 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. Under a relatively small load, the pure steel plate wall will buckle locally and produce large in-plane deformation. Therefore, the hysteretic curve shows obvious pinching phenomenon, and the energy dissipation capacity of the steel plate cannot be fully utilized.

The application of embedded steel plate and one-sided steel plate composite shear wall to the building structure group has the following disadvantages: 1) Since the concrete is located outside the steel plate, in the case of large deformation, the concrete plate may crack and peel off, which greatly restricts the steel plate. 2) The cracking of concrete is difficult to control, and the exposure of cracks is unavoidable, which affects normal use and durability. The prestressed external steel plate-concrete composite shear wall proposed by the present invention is one of the effective ways to solve the above problems: 1) The concrete is filled in the outer steel plate, which can always restrain the steel plate, while the outer steel plate Embedded concrete also has a restraining effect, thereby improving the bearing capacity and deformation capacity of the embedded concrete slab, which greatly improves the ductility and energy dissipation capacity of the shear wall under large earthquakes; 2) The structure of the external steel plate-concrete composite shear wall Simple, the steel structure is easy to transport and install, and the construction is simple; 3) The outer steel plate can effectively avoid the exposure of concrete cracks; 4) The hysteretic curve of the outer steel plate-concrete composite shear wall is full, showing strong ductility and energy dissipation capacity, It has excellent anti-seismic performance.

The external steel plate-concrete composite shear wall with tensile support proposed by the present invention is characterized in that the external steel plate-concrete composite shear wall with tensile support is composed of external steel plate, embedded concrete plate, tensile support, Composed of brackets, connecting ear plates, L-shaped connecting plates, edge members, frame beams and frame columns; the outer steel plates are made of thin steel plates; the embedded concrete plates are made of prefabricated concrete plates; ; The bracket is a support perpendicular to the steel plate surface that can be connected to the prestressed cable with holes; the connecting ear plate is the end ear plate for fixing the prestressed cable; the L-shaped connecting plate is a steel plate with bolt holes ; The edge members are vertical edge members and horizontal edge members respectively; the outer steel plate is connected with the vertical edge member and the horizontal edge member; the embedded concrete plate is connected with the outer steel plate; One end of the bracket is fixed to the connecting lug, the bracket is connected to the vertical edge member; the connecting lug is connected to the frame beam. The vertical edge components and the horizontal edge components are connected by L-shaped connecting plates. The frame beams are connected to the frame columns.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tensile support, the externally attached steel plate is made of low yield point high ductility steel or high strength high ductility steel, and is hung on both sides of the embedded concrete plate, and ordinary bolts are used to connect with it. connect. And it is cut at four corners to facilitate the connection between edge members.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tensile support, the embedded concrete slab is a prefabricated embedded concrete slab, which is connected with the externally attached steel plate by ordinary bolts.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tension support, the externally attached steel plate is welded to the bracket.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tensile support, the connection between the externally attached steel plate and the edge members is divided into two types, one is all welding with the edge members, and the other is bolted connection with the edge members.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tension support, one end of the tension support is connected to the bracket, and the other end is connected to the connecting ear plate.

In the above-mentioned external steel plate-concrete composite shear wall with tension support, the tension support, the bracket, the connecting ear plate and the L-shaped connecting plate are symmetrical on both sides of the embedded concrete plate layout.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tension support, the vertical edge member and the horizontal edge member are connected by L-shaped connecting plate bolts.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tensile support, the connecting lugs are arranged symmetrically on the flange of the frame beam, and are welded or bolted to the frame beam.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tensile support, the horizontal edge member is welded or bolted to the frame beam.

In the above-mentioned externally attached steel plate-concrete composite shear wall with tensile support, the frame beam is welded or bolted or bolted to the frame column.

The invention can effectively limit the out-of-plane deformation of the steel plate wall by arranging tensile supports at the four corners of the 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 and embedded concrete slabs on the steel plate shear wall, To control the out-of-plane stability of steel plate shear walls. At the same time, the prestressed cable 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 steel plate shear wall is only connected with the frame beam, so as to avoid increasing the burden of the frame 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 externally attached steel plate-concrete composite shear wall with tension support provided by the invention is a new type of lateral force-resisting component for high-rise building steel structures or other structures.

Description of drawings

Fig. 1 is a schematic diagram of the structure of an externally attached steel plate-concrete composite shear wall with tensile support according to the present invention.

Fig. 2 is an exploded view of an externally attached steel plate-concrete composite shear wall unit with tensile support according to the present invention.

In the figure: 1—external steel plate, 2—embedded concrete slab, 3—tension support, 4—bracket, 5—connecting ear plate, 6—L-shaped connecting steel plate, 7—vertical edge member, 8—horizontal edge member , 9—frame beam, 10—frame column.

Detailed ways

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

As shown in Figure 1-2, the external steel plate-concrete composite shear wall with tensile support is composed of external steel plate 1, embedded concrete plate 2, tensile support 3, bracket 4, connecting ear plate 5, L-shaped The connecting plate 6, the edge member, the frame beam 9 and the frame column 10 are composed; the outer steel plate 1 adopts a thin steel plate; the embedded concrete plate 2 adopts a prefabricated concrete plate, and the tensile support 3 adopts a prestressed cable; The bracket 4 is a support perpendicular to the steel plate surface with holes that can be connected to the prestressed cable; the connecting ear plate 5 is the end ear plate for fixing the prestressed cable; the L-shaped connecting plate 6 is a steel plate with bolt holes ; The edge members are respectively vertical edge members 7 and horizontal edge members 8; the externally attached steel plate 1 is connected with the vertical edge member 7 and the horizontal edge member 8; the embedded concrete plate 2 is connected with the externally attached steel plate 1; One end of the tensile support 3 is fixed to the bracket 4 and the other end is fixed to the connecting lug 5 , the bracket 4 is connected to the vertical edge member 7 ; the connecting lug 5 is connected to the frame beam 9 . The vertical edge member 7 and the horizontal edge member 8 are connected by an L-shaped connecting plate 6 . The frame beams 9 are connected to frame columns 10 .

In the above-mentioned externally attached steel plate-concrete composite shear wall with tensile support, the externally attached steel plate 1 is made of low yield point high ductility steel or high strength high ductility steel, and is hung on both sides of the embedded concrete plate 2. The bolts are connected with it; and the four corners are cut to facilitate the connection between the edge components; the externally attached steel plate 1 and the bracket 4 are connected by welds. The outer steel plate 1 is welded or bolted to the edge member; one end of the tensile support 3 is connected to the bracket 4 , and the other end is connected to the connecting ear plate 5 . The tension support 3, the bracket 4, the connecting ear plate 5 and the L-shaped connecting plate 6 are symmetrically arranged on both sides of the embedded concrete slab 2; the vertical edge member 7 and the horizontal The edge member 8 is bolted through the L-shaped connecting plate 6; the connecting ear plate 5 is arranged symmetrically on the flange of the frame beam 9 and welded with the frame beam 9; the horizontal edge member 8 is welded with the frame beam 9 or bolted connection; the frame beam 9 and the frame column 10 are welded or bolted or bolted.

The out-of-plane stiffness of the above-mentioned externally attached steel plate-concrete composite shear wall with tensile support 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 externally attached steel plate-concrete composite shear wall with tensile support 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 to improve The defect of easy buckling of the traditional steel plate shear wall is eliminated, and the lateral resistance capacity of the steel plate shear wall is improved. Moreover, all components of the present invention can be processed and installed in a factory, and then transported to the construction site for assembly, which saves manpower and material resources and reduces the cost.

Claims (10)

1. An externally attached steel plate-concrete composite shear wall with tensile support, its technical feature is that: the externally attached steel plate-concrete composite shear wall with tensile support is composed of externally attached steel plate (1), embedded concrete plate (2), tension support (3), bracket (4), connecting ear plate (5), L-shaped connecting plate (6), vertical edge member (7), horizontal edge member (8), frame beam (9) Composed of frame columns (10); the outer steel plate (1) is a thin steel plate; the embedded concrete plate (2) is a prefabricated concrete plate; the tension support (3) is a prestressed cable; the bracket (4) is a support perpendicular to the steel plate surface with holes that can be connected to the prestressed cable; the connecting ear plate (5) is the end ear plate for fixing the prestressed cable; the L-shaped connecting plate (6) is a steel plate for bolt holes; the edge components are respectively vertical edge components (7) and horizontal edge components (8); the externally attached steel plate (1) is connected to the vertical edge components (7) and horizontal edge components (8); The embedded concrete slab (2) is connected to the externally attached steel plate (1); one end of the tensile support (3) is fixed to the bracket (4) and the other end is fixed to the connecting ear plate (5), and the bracket (4) Connected with the vertical edge member (7); the connecting ear plate (5) is connected with the frame beam (9); the vertical edge member (7) and the horizontal edge member (8) pass through the L-shaped connecting plate (6) connection; the frame beam (9) is connected with the frame column (10). 2. The externally attached steel plate-concrete composite shear wall with tensile support according to claim 1, characterized in that: the externally attached steel plate (1) is made of low yield point high ductility steel or high strength high ductility steel, and is hung on The two sides of the embedded concrete slab (2) are connected with common bolts. And it is cut at four corners to facilitate the connection between edge members. 3. The externally attached steel plate-concrete composite shear wall with tensile support according to claim 1, characterized in that: the embedded concrete slab (2) is a prefabricated concrete slab, and ordinary bolts and externally attached steel plates (1) are used connect. 4. The externally attached steel plate-concrete composite shear wall with tensile support according to claim 1, characterized in that: the externally attached steel plate (1) and the bracket (4) are welded. 5. The externally attached steel plate-concrete composite shear wall with tensile support according to claim 1, characterized in that: the externally attached steel plate (1) is welded or bolted to the edge members (7) and (8). 6. The externally attached steel plate-concrete composite shear wall with tensile support according to claim 1, characterized in that: one end of the tensile brace (3) is connected to the bracket (4), and the other end is connected to the connecting ear plate (5 )connect. 7. The externally attached steel plate-concrete composite shear wall with tension support according to claim 1, characterized in that: tension struts (3), brackets (4), connecting ear plates (5) and L-shaped connecting plates (6) Symmetrically arranged on both sides of the embedded concrete slab (2). 8. The externally attached steel plate-concrete composite shear wall with tensile support according to claim 1, characterized in that: the vertical edge member (7) and the horizontal edge member (8) are bolted through the L-shaped connecting plate (6) . 9. The externally attached steel plate-concrete composite shear wall with tensile support according to claim 1, characterized in that: the connecting lugs (5) are symmetrically arranged at the flange of the frame beam (9), and are connected to the frame beam (9) )welding. 10. The externally attached steel plate-concrete composite shear wall with tensile support according to claim 1, characterized in that: the horizontal edge member (8) is welded or bolted to the frame beam (9); the frame beam (9) It is welded or bolted or bolted to the frame column (10).

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