CN105926811A - Multi-cover-plate assembly type two-end connecting steel plate shear wall node - Google Patents

Abstract

The invention discloses a steel plate shear wall node of a multi-cover assembly type with both ends connected, frame beams and frame columns are spliced vertically and horizontally to form a rectangular frame of the steel plate shear wall; the flanges of the frame beams are connected to the The cover plate and the connecting base plate are connected with the steel plate shear wall; the connecting base plate and the connecting cover plate are arranged on both sides of the steel plate shear wall and clamped; there is a distance between the steel plate shear wall and the frame column, and the two are not in direct contact . The flange of the frame beam and the connecting cover are connected by vertically arranged cover-frame connecting bolts; the flange of the frame beam and the steel plate shear wall are connected by horizontally arranged steel plate shear wall connecting bolts; All components of the present invention are processed and installed in the factory, and then shipped to the construction site for bolted assembly. This implementation mode is beneficial to ensure the structural quality, reduce labor costs, and facilitate post-earthquake repairs.

Description

A steel plate shear wall joint with multi-cover assembly type connected at both ends

technical field

The invention relates to a novel multi-cover assembled steel plate shear wall node with both ends connected, and belongs to the technical field of structural engineering.

Background technique

At present, in many developed countries, prefabricated steel structure housing has become the focus and core of housing industrialization. It has many advantages such as improving quality, shortening construction period, saving energy, reducing consumption, and clean production. After entering the 21st century, with the further rapid development of my country's economy, the construction industry, like other industries, is facing the urgent need for industrialized technological transformation, and the impact of the construction industry on the environment is becoming more and more serious. The current situation of oversupply also just meets the needs of the development of prefabricated steel structure housing. my country's prefabricated steel structure system buildings are ushering in a golden age of development. Compared with the prefabricated concrete structure system, the prefabricated steel structure system is more suitable for industrialized prefabricated systems. The reason is that steel has good mechanical processing performance and is suitable for factory production and processing; The structure is light, suitable for transportation and assembly; the third is that the steel structure is suitable for high-strength bolt connection, which is convenient for assembly and disassembly.

The prefabricated high-rise steel structure system is still in its infancy in China. The structural form is relatively single, and it is impossible to truly realize high-rise. Factors such as relatively lagging research and development of supporting equipment also restrict the development of prefabricated high-rise steel structures. As an effective anti-lateral force system, the steel plate shear wall is used in the ordinary high-rise steel structure system in some developed countries. 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 (frame beams, columns, and stiffened plates). Embedded steel plates are usually connected with edge members to form a lateral force resistant structural system.

With the in-depth research on steel plate shear walls at home and abroad, the post-buckling performance of thin steel plate shear walls has been widely concerned. After buckling, thin steel plate shear walls still have high bearing capacity, good ductility and stable Energy consumption capacity. Making full use of the post-buckling strength of thin steel plate shear walls can not only achieve good seismic performance of the structure, but also significantly reduce the amount of steel used. The light weight of thin steel plate shear walls reduces the burden on frame columns and foundations, reducing the Foundation cost, and effectively reduce the effect of earthquake load. The thin steel plate shear wall can be regarded as an energy-dissipating shock-absorbing device of the structure. This device has a relatively large stiffness under wind or small earthquakes, but it should first enter the inelastic state when a strong earthquake occurs, resulting in large damping and a large amount of energy consumption. Seismic energy input to the structure.

The steel plate wall with slots on both sides is proposed to avoid the adverse effect of the tension field of the thin steel plate on the column. Only the upper and lower sides of this steel plate wall are connected with the frame beam, and a certain distance is reserved between the left and right sides and the frame column. In the residential steel structure, due to the need for openings such as doors and windows, it is not appropriate to use support or four-sided embedded steel plate walls, and the use of two-sided slotted steel plate walls can meet the functional requirements. However, after the wallboard is separated from the column, the lateral stiffness and bearing capacity are greatly reduced. This is because the tension field of the wallboard is completely anchored on the beam, and some areas of the wallboard cannot function.

At present, most of the steel plate shear wall connection methods used in domestic and foreign projects are fully welded. In research tests, the single fishplate fully bolted connection method is mostly used, and the bolted and welded hybrid connection is generally not considered. Compared with bolting and welding, welding will greatly increase labor costs and prolong the construction period, and the quality of welds is not easy to guarantee, and problems such as excessive residual stress also restrict the development of steel plate shear walls. Bolted joints theoretically have better ductility than welded joints, and the friction energy between bolts consumes part of the seismic input energy under the action of a large earthquake. However, bolted joints have certain requirements for component processing accuracy, and steel plate shear walls with insufficient precision Difficult to install later. Traditional bolting is also prone to "unbuttoning" phenomenon.

Contents of the invention

The present invention proposes a new type of steel plate shear wall joint with multi-cover assembly type with both ends connected. The advantage of this joint is that it can not only ensure the force transmission performance of the joint, exert the good lateral resistance capacity of the steel plate shear wall, but also effectively reduce the cumulative error between the pores, and is easy to assemble. The use of multi-cover connections can not only increase the number of effective friction surfaces, effectively increase the critical friction force, but also avoid the phenomenon of "unbuttoning".

No matter what kind of steel wall panel, as long as there is a tension field effect in the embedded steel plate, the development of the tension field and the distribution of strength must be uneven, and the diagonal tension band yields first, and the bolts (or welds) in this area bear the greatest tension , gradually decreases toward the middle. If the bolted connection method is adopted, frictional high-strength bolts must be used to strictly control the slippage under the design wind load or small earthquake, and the critical friction force should not be overcome before the wallboard fully yields. The traditional bolt connection uses a single fishplate and wallboard for connection, and the friction surface is only the contact surface (single side) between the wallboard and the fishplate. However, the steel plate shear wall joints connected at both ends of the multi-cover plate assembly increase the number of friction surfaces to two (wall plate and connecting cover plate, wall plate and connecting bottom plate), which can effectively increase the critical friction force and ensure that the wall The panels yield sufficiently before the wall panels slip.

Under the action of medium and large earthquakes, if all-welded connections are used, the corner welds are easy to tear, and the thin steel plate shear walls are easy to buckle, so the repair after the earthquake will be extremely difficult. If the traditional bolt connection is adopted, after the corner bolts slip, the hole wall at the corner of the shear wall is stretched, and the hole diameter becomes larger, which is prone to "unbuttoning" phenomenon.

The steel plate shear wall node of the multi-cover assembly type with both ends connected by the present invention well solves the above problems. Due to the design of multiple cover plates clamping the steel plate shear wall, the number of friction surfaces of the steel plate shear wall is effectively increased, thereby effectively increasing the critical friction force and making it more difficult for the bolt to slip. Even if the bolts slip and the hole wall stretches, since the shear wall is clamped by multiple cover plates, it is impossible to "unbutton" phenomenon. Since the connecting bottom plate is welded to the beam bottom, in order to ensure the rigidity of the connecting bottom plate, vertical stiffeners are arranged at both ends of the connecting bottom plate. This is so that if the steel plate buckles during loading, the connecting base plate will not deform out of plane as the steel plate buckles. Post-earthquake repairs only need to loosen the bolts and replace the damaged components.

All components of the invention are machined in the factory and then bolted and assembled on site. The construction of this node is simple and convenient, the construction period is short, and the cost is reduced. It belongs to the assembled steel structure.

The present invention proposes a joint of steel plate shear wall with multi-cover assembly type two-end connection, including frame beam (1), cover plate-frame connecting bolt (2), connecting bottom plate (3), and steel plate shear wall (4) , connecting cover plate (5), steel plate shear wall connecting bolt (6) and frame column (7). It is characterized by:

The frame beam (1) and the frame column (7) are spliced vertically and horizontally to form a rectangular frame of the steel plate shear wall; the flange of the frame beam (1) is connected to the cover plate (5) and the bottom plate ( 3) connected with the steel plate shear wall (4); the connecting bottom plate (3) and the connecting cover plate (5) are arranged on both sides of the steel plate shear wall (4) and clamped; the steel plate shear wall ( 4) There is a distance between the frame column (7), and the two are not in direct contact.

The flange of the frame beam (1) and the connecting cover plate (5) are connected by vertically arranged cover plate-frame connecting bolts (2);

The flange of the frame beam (1) is connected to the steel plate shear wall (4) through horizontally arranged steel plate shear wall connecting bolts (6);

The frame beam (1) adopts ordinary H-shaped steel with a beam width of not less than 200mm, and a large bolt hole is opened at a corresponding position on one side of the lower flange; the connecting bottom plate (3) is a perforated steel plate with stiffening ribs at both ends; the The steel plate shear wall (4) adopts a thin steel plate with a thickness of 3-10mm; the connecting cover plate (5) is a welded angle steel; the frame column (7) is a welded box-shaped steel or a standard square steel pipe or an H-shaped steel column;

A large bolt hole is opened on one side of the flange of the frame beam (1) and a plurality of connecting cover plates (5) are bolted through cover plate-frame connecting bolts (2).

The other side of the flange of the frame beam (1) is welded to one or more connecting bottom plates (3).

The two ends of the connecting bottom plate (3) are provided with longitudinal stiffeners, the total width is not more than 890mm and the number of bolt holes is not more than 9, and the bolt hole diameters are all normal bolt hole diameters.

The connecting cover plate (5) is a welded angle steel, the length of which is not more than 290 mm, and the long and short sides each have no more than three bolt holes with normal apertures, the short side is bolted to the flange side of the frame beam (1), and the long side is connected to the The bottom plate (3) clamps the steel plate shear wall (4) and is bolted.

The distance between the adjacent connecting cover plates (5) is not less than 10mm.

The center of the steel plate shear wall (4) is aligned with the frame beam (1), and a gap of 10mm is guaranteed between them.

The bolt apertures provided in the steel plate shear wall (4) are large apertures.

All components and welding work are completed by the factory, and only assembly construction is carried out on site.

Description of drawings

Fig. 1 is a schematic diagram of the steel plate shear wall field with multiple cover plates assembled at both ends of the present invention.

Fig. 2 is an exploded view of the steel plate shear wall with multiple cover plates assembled at both ends of the present invention.

Fig. 3 is an exploded view of a local unit of a steel plate shear wall joint with multiple cover plates assembled at both ends of the present invention.

Fig. 4 is a detailed cross-sectional view of joints of steel plate shear walls with multiple cover plates assembled at both ends of the present invention.

detailed description

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

As shown in Figures 1 and 2, 1—frame beam, 2—cover plate-frame connecting bolt, 3—connecting base plate, 4—steel plate shear wall, 5—connecting cover plate, 6—steel plate shear wall connecting bolt, 7 -Frame column.

The prestressed inclined multi-layer folded plate steel plate shear wall proposed by the present invention includes frame beams, cover plate-frame connecting bolts, connecting bottom plates, steel plate shear walls, connecting cover plates, steel plate shear wall connecting bolts and frame columns. The frame beam adopts ordinary H-shaped steel with a beam width of not less than 200mm, and a large bolt hole is opened at the corresponding position on one side of the lower flange; the connecting bolts are cover plate-frame connecting bolts and steel plate shear wall connecting bolts, and the cover The plate-frame connecting bolts are high-strength bolts placed vertically, the connecting bolts of the steel plate shear wall are high-strength bolts placed horizontally; the connecting bottom plate is a perforated steel plate with stiffeners at both ends; the steel plate shear wall adopts thickness 3-10mm thin steel plate; the connecting cover plate is welded angle steel; the frame column is welded box steel, standard square steel pipe or H-shaped steel column; the frame beam is connected to the frame column; the frame beam flange is connected to the connecting cover plate connection; the frame beam flange is connected to the connecting bottom plate; the steel plate shear wall is connected to the frame beam through the connecting bottom plate and the connecting cover plate; the connecting bottom plate and the connecting cover plate are clamped and arranged on both sides of the steel plate shear wall .

In the above-mentioned steel plate shear wall joint of multi-cover assembly type with both ends connected, the large bolt holes on one side of the flange of the frame beam are bolted to the multiple connecting cover plates through the cover plate-frame connecting bolts. The other side of the frame beam flange is welded to one or more connecting bottom plates. Longitudinal stiffeners are provided at both ends of the connecting bottom plate, the total width is not more than 890 mm and the number of bolt holes is not more than 9, and the bolt hole diameters are all normal bolt hole diameters. The connecting cover plate is welded angle steel, the length is not more than 290mm, and the long and short sides are respectively opened with no more than 3 bolt holes with normal apertures, the short side is bolted to the flange side of the frame beam, and the long side and the connecting bottom plate are clamped with steel plate shear wall bolts catch. The distance between the adjacent connecting cover plates is not less than 10mm. The center of the steel plate shear wall is aligned with the center of the frame beam, and a gap of 10 mm is guaranteed between them. The diameter of the bolt hole opened in the steel plate shear wall is a large hole diameter. The steel plate shear wall is not connected with the frame column. All components and welding work are completed by the factory, and only assembly construction is carried out on site.

The out-of-plane rigidity of the above-mentioned prestressed inclined multi-layer folded steel plate shear wall is very large, which can effectively control the out-of-plane deformation during transportation, installation and use, and maintain the stability and safety of the steel plate.

The multi-cover plate assembly type steel plate shear wall node with two ends connected is designed according to the mechanical characteristics of the two ends connected steel plate shear wall, which increases the number of friction surfaces of the steel plate shear wall and effectively improves the critical friction The bolts are more difficult to slip; the traditional steel plate shear wall bolts are difficult to install and easy to "unclip" and other problems; the traditional welding joints are difficult to guarantee the quality, the residual stress is too large, and the labor cost is too high. Greatly strengthened the post-earthquake repairable function.

All components of the present invention can be processed and installed in the factory, and then transported to the construction site for assembly, which is easy to ensure quality, saves manpower and material resources, and reduces cost.

Claims (10)

1. the two ends of cover plate assembled more than kind junction steel plate shear wall node, it is characterised in that: Cut including Vierendeel girder (1), cover plate-framework connecting bolt (2), connecting bottom board (3), steel plate Power wall (4), connection cover plate (5), steel plate shear force wall connecting bolt (6) and frame column (7)；

Vierendeel girder (1) and frame column (7) carry out vertically and horizontally to splicing, and composition steel plate is cut Power wall rectangular box；The edge of a wing of described Vierendeel girder (1) with by be connected cover plate (5), connect Base plate (3) is connected with steel plate shear force wall (4)；Described connecting bottom board (3) be connected cover plate (5) it is arranged in the both sides of steel plate shear force wall (4) and is clamped；Described steel plate shear force wall (4) And there is spacing between (7) in frame column, both not in direct contact；

The edge of a wing of Vierendeel girder (1) be connected between cover plate (5) by the cover plate that is vertically arranged- Framework connecting bolt (2) is attached；

By horizontally disposed steel plate between the edge of a wing and the steel plate shear force wall (4) of Vierendeel girder (1) Shear wall connecting bolt (6) is attached.

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: described Vierendeel girder (1) uses deck-siding to be not less than the general of 200mm Logical H profile steel, and open king-bolt hole at side, lower flange correspondence position；Described connecting bottom board (3) Open pore steel plate for two ends band ribbed stiffener；Described steel plate shear force wall (4) uses thickness to be 3-10mm Sheet metal；Described connection cover plate (5) is welding angle steel；Described frame column (7) is welding Box steel or standard square steel tube or H profile steel post.

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: king-bolt hole is opened with multiple in described Vierendeel girder (1) side, the edge of a wing Connect cover plate (5) to be bolted by cover plate-framework connecting bolt (2).

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: described Vierendeel girder (1) edge of a wing opposite side and one or more companies Connect base plate (3) welding.

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: described connecting bottom board (3) two ends arrange longitudinal stiffener, always Width no more than 890mm and open bolt hole count and be not more than 9, bolt aperture is normal spiral shell Keyhole footpath.

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: described connection cover plate (5) is not more than for welding angle steel, length 290mm, long minor face respectively opens the bolt hole less than three normal apertures, minor face and Vierendeel girder (1) Side, the edge of a wing bolts, long limit and connecting bottom board (3) clamping steel plate shear force wall (4) bolt.

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: between described adjacent connection cover plate (5), interval is not less than 10mm.

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: described steel plate shear force wall (4) and described Vierendeel girder (1) center Alignment, between ensure the space of 10mm.

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: the bolt aperture that described steel plate shear force wall (4) is offered is macropore Footpath.

One many cover plates assembled two ends the most according to claim 1 junction steel plate shearing Wall node, it is characterised in that: all components and welding job have been responsible for by factory, on-the-spot Only carry out assembling construction.