WO2020019948A1

WO2020019948A1 - Assembled variable-stiffness transverse-connection energy dissipation member and method for installing same

Info

Publication number: WO2020019948A1
Application number: PCT/CN2019/094446
Authority: WO
Inventors: 朱立猛; 张春巍; 孙丽; 孔令懋; 郑杰
Original assignee: 张春巍
Priority date: 2018-07-24
Filing date: 2019-07-02
Publication date: 2020-01-30
Also published as: EP3643855B1; EP3643855A1; AU2019261749A1; CN108952283A; CN108952283B; AU2019261749B2; EP3643855A4

Abstract

Disclosed is an assembled variable-stiffness transverse-connection energy dissipation member, comprising an energy dissipation region (14), a reinforced region (15), and left and right connection end plates (2) connected to a shear wall, wherein the left and right connection end plates (2) are connected to the shear wall via high-strength confined stay bolts (3); the reinforced region (15) includes a number of steel plates (7, 8), and buckling constraint plates (9) are provided at the front and back of the adjacent steel plates (7, 8), and are connected to the steel plates (7, 8) via bolts (10); and a gap is provided between the adjacent steel plates (7, 8), and the reinforced region (15) is further provided with a threshold control device. A method for installing the assembled variable-stiffness transverse-connection energy dissipation member is further provided. The energy dissipation member can realize reliable transverse all-bolt connection without a welded seam between adjacent shear walls, and is easily detached and installed. Under the action of minor and medium severity earthquakes, firstly, for the energy dissipation member, steel plates in the energy dissipation region are subjected to yielding energy dissipation, and the steel plates in the reinforced region do not work; and under the action of strong and super-strong earthquakes, the steel plates in the reinforced region start to work, and improve the structural performance thereof.

Description

Assembled variable stiffness lateral connection energy consuming member and installation method

Technical field

The invention relates to an assembly-type variable stiffness lateral connection energy dissipating member, and belongs to the technical field of earthquake resistance of building structures.

Background technique

With the rapid development of China's urbanization process, more and more types of high-rise and super-tall building structures are becoming more complex. This requires new anti-seismic technology requirements and the durability and seismic resistance of the structure. With higher bearing capacity and deformation capacity, it has been widely used in structural systems, but the shear wall structure under the action of lateral and vertical forces, the bending deformation is greater, if the wall has vertical seams, the vertical The contact surface will produce relative shear slip deformation. Under large earthquakes and super earthquakes, the lateral stiffness and bearing capacity of the structure will continue to decline and collapse. Therefore, it is considered to add an energy-consuming bearing device at the concentrated position of the shear wall deformation. However, if the transverse connection between the energy consuming device and two adjacent shear walls is welded, it will cause huge residual deformation and residual stress.

At present, most of the shear energy-consuming dampers are based on a single type of shear yield damper. When the damper strength does not improve after yielding, it does not have the ability to increase after the bearing capacity and stiffness decrease. It cannot have the capability of energy consumption, load bearing, stiffness jump and energy consumption bearing functional design.

Summary of the Invention

The purpose of the present invention is to overcome the above-mentioned shortcomings of the existing transverse wall transverse connectors, and propose an assembled variable stiffness lateral connection energy dissipating member with a controllable threshold and a secondary integrated stiffness jump function to achieve adjacent shear walls. The cross-weld-free full-bolt connection is reliable and easy to disassemble and install.

The present invention is implemented using the following technical solutions:

An assembly-type variable stiffness lateral connection energy dissipating component includes an energy consumption area, a lifting area, and left and right connecting end plates connected to a shear wall. The left and right connecting end plates are connected to the shear wall through high-strength restraint rod bolts, and the lifting area includes several Steel plates, adjacent steel plates are provided with buckling restraining plates before and after, connected to the steel plates by bolts, a gap is provided between adjacent steel plates, and a threshold control device is also provided in the lifting area. The bolts in the lifting area are all high-strength bolts.

The energy consumption zone uses a soft steel plate with a lower yield point, and the lifting zone uses a normal yield point or a strong steel plate with a higher yield point.

The steel plate in the energy consumption zone is made of soft steel or stainless steel, and the steel plate in the lifting zone is made of ordinary steel or high-strength steel.

The steel plates in the energy consumption zone are located on both sides of the steel plate outside the lifting zone.

The steel plate in the energy consumption area is connected with the bolt connection plate by bolts, and the bolt connection plate is welded with the left and right connection end plates.

The lifting steel plate is divided into two pieces.

The bolt connection plate is located on the inner and outer sides of the steel plate in the energy consumption area, and the bolt connection plate inside the energy consumption area is welded to the left and right connection end plates. The outer steel plate is not welded to the left and right connection end plates, and the steel plate and the bolt connection plate are directly fixed by bolts.

The threshold control device is implemented by bolt holes connected to the buckling restraint plate on the steel plate in the lifting zone. The diameters of the bolt holes of the adjacent steel plates are different, and the bolt holes on the steel plate on one side are larger than the screw diameter.

The bolt holes of the steel plate on one side of the lifting area are matched with the screw diameter, and the bolt holes of the steel plate on the other side are larger than the screw diameter by 2 to 3 mm. After the threshold-controlled damper soft steel is yielded, the secondary stiffness is increased.

The left and right connecting end plates are provided with a sliding track matching the steel plate in the lifting area. The purpose of the sliding track on the lifting area is to prevent out-of-plane buckling of the steel plate.

Two adjacent steel plates in the lifting area are respectively welded to the left and right connecting end plates on one side, and a gap is provided on the unwelded side. The sliding track is provided on the left side of the steel plates on the left and right connecting end plates, and Left and right connection end plates are welded.

The steel plates in the energy consuming area are arranged side by side in a vertical direction at a number of six and are equally spaced. The pitch is preferably 15-35mm.

The bolt connection plate on the outer side of the energy consumption area is not welded to the left and right connection end plates, and a certain gap is left between the plates, and the gap is equal in length to the steel plate in the energy consumption area.

The steel plate in the lifting area and the buckling restraint plate are connected by high-strength bolts.

An installation method of the assembled type variable stiffness lateral connection energy dissipating member, the steps are as follows:

(1) Reserve bolt holes: reserve the designed bolt hole size on the steel plate in the energy consumption area, the steel plate in the lifting area, the buckling constraint plate and the bolt connection plate in the energy consumption area;

(2) Welded steel plates: Weld the bolt connection plates inside the energy consumption area to the left and right connection end plates, and the steel plates in the lifting area are welded to one side of the left and right connection end plates, respectively.

(3) Bolt connection: The steel plate in the lifting area is placed with the buckling restraint plate parallel to the front and back with bolts, and then the steel plate in the energy consumption area and the outer bolt connection plate are connected by bolts. The steel plate in the lifting area and the buckling restraint plate are connected by high-strength bolts.

(4) Connect the shear wall: connect the left and right connecting end plates with the combined steel plate shear walls on both sides by bolts with high-strength restraint rods.

The beneficial effects of the present invention are:

(1) This assembled variable-rigidity lateral connection energy-consuming component is a variable-rigidity energy-consuming connection component capable of achieving reliable lateral bolt connection, easy assembly, and disassembly of a shear wall member. Integrate a new type of shear damper with increased stiffness, and use an external steel plate in the energy consumption area and a built-in steel plate in the lifting area;

(2) This assembly-type variable-rigidity laterally connects energy-consuming components. The energy-consuming area uses energy-consuming steel plates made of low-yield mild steel, which has good ductility and strong deformation ability, and excellent hysteretic energy-consuming performance. , It is less affected by the external environment, and has the characteristics of convenient production, installation and replacement;

(3) The assembled variable-rigidity laterally connected energy consuming parts, and the threshold value control device of the stiffness lifting zone mainly uses the track reserved in the steel plate and the diameter of the bolt hole in the steel plate to change the damper to achieve staged Dissipate seismic energy to ensure that the damper first consumes energy from soft steel under small and medium earthquakes. The steel plate in the lifting area does not participate in the work. Under the action of large earthquakes and super large earthquakes, the steel plate in the lifting area starts to work and lifts the structure. Performance

(4) The assembled variable stiffness laterally connects energy consuming parts, the steel plate in the stiffness lifting area is located inside, and a deformation threshold is set. When the deformation exceeds the threshold, the work starts, so that the two adjacent shear walls enter the second stage of common working state. , To obtain the ability to increase the lateral load capacity after the peak drop.

(5) The assembled variable-rigidity laterally connected energy consuming parts, and the reliable connection of the damper to the shear wall can reduce the damage of the shear wall under the action of earthquake;

(6) The assembled variable-rigidity laterally connects energy consuming parts, and the steel plate in the energy consuming area is bolted to facilitate disassembly and replacement;

(7) The assembled variable-rigidity laterally connects the energy consuming parts, and the connection between the energy consuming parts and the shear wall is bolted with high-strength restraint rods, which can be easily removed and replaced.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the three-dimensional structure of the present invention.

FIG. 2 is a schematic plan view of the structure of the present invention.

FIG. 3 is a schematic structural diagram of a bolt connection plate in an energy consumption area of the present invention.

FIG. 4 is a schematic structural diagram of a connection between a steel plate threshold control device and a buckling restraint plate in the lifting zone of the present invention.

FIG. 5 is a structural schematic view of a steel plate sliding track in a lifting area of the present invention.

FIG. 6 is a schematic structural diagram of a laterally reliable connection between the present invention and a composite steel plate shear wall.

Reference sign

In the picture: 1. Composite steel plate shear wall; 2. Left and right connecting end plates; 3. High-strength tie rod bolts; 4. Bolt connecting plates; 5. Energy-consuming zone steel plates; 6. Bolts; 7. Upper steel plates; 8. Lower portions Steel plates; 9, buckling restraint plates; 10, high-strength bolts; 11, upper steel plate bolt holes; 12, lower steel plate bolt holes; 13, sliding rails; 14, energy consumption zone; 15, lifting zone.

detailed description

The invention is further described below with reference to the drawings.

Example 1

As shown in FIG. 1, an assembly-type variable stiffness lateral connection energy consuming component according to the present invention includes a lifting region 15, an energy consumption region 14, and left and right connection end plates 2. The energy consumption zone includes mild steel energy consumption zone steel plate 5, bolt 6, and bolt connection plate 4. The lifting area includes an upper steel plate 7, a lower steel plate 8, an upper steel plate bolt hole 11, a lower steel plate bolt hole 12, two front and rear buckling restraint plates 9, a high-strength bolt 10, and a sliding track 13.

As shown in FIG. 2, which is a schematic plan view of the present invention, the outside of the damper is an energy consumption region 14, and the lifting region 15 is located inside the damper. The height of the bolt connection plate inside the energy consumption zone 14 is the same as that of the left and right connection end plates. It is distributed at both ends of the steel plate in the energy consumption zone and welded to the left and right connection end plates. The steel plates are consistent and distributed at the left and right ends of the steel plate, but are not welded to the left and right connection end plates. The steel plate 5 is connected to the bolt connection plates on both sides by bolts 6, and the bolt connection can effectively avoid local stress concentration and residual deformation, and it can also achieve consumption Removable and replaceable performance of soft steel. The steel plate in the lifting area and the front and rear buckling restraint plates are connected by high-strength bolts. Two steel plates are welded to the left connection end plate and one is connected to the right connection end plate. The other side of the welded steel plate is left at a certain distance from the left and right connection end plates. Sliding rails 13 are provided at the front and back of the steel plate, which can restrain buckling of the steel plate.

As shown in FIG. 3, it is a schematic structural diagram of an energy-consuming area connecting plate according to the present invention. The energy-consuming area connecting plates are distributed at the left and right ends of the soft steel in the energy-consuming area. A connecting plate is not welded to the left and right connecting plates 2 and a certain gap is left between the plate and the steel plate. The interval between the gap and the mild steel is equal, so as to ensure that the steel plate in the energy consumption zone has enough space to deform to dissipate the energy input from the earthquake. And it can dismantle soft steel with strong replaceability, which meets the goals of low carbon, energy saving, green, ecology and sustainable development.

As shown in FIG. 4 and FIG. 5, which are schematic structural diagrams of the lifting area 15 of the present invention, the steel plate in the lifting area is divided into two parts: an upper steel plate 7 and a lower steel plate 8. The two-part steel plate is connected with the buckling restraint plate arranged in parallel by high-strength bolts, and the threshold control device is realized through the bolt holes of the steel plate (including the upper steel plate bolt hole 11 and the lower steel plate bolt hole 12), and the two steel plate bolt holes The diameters are different. The bolt holes of one steel plate are set as normal, and the diameter of the bolt holes of another steel plate is set to be 2 to 3 mm larger than the normal diameter. This ensures that the connection of energy-consuming components is firstly energy-consuming soft steel. After the steel yields, the rigidity jump phase of the lifting zone is carried out. Figure 5 is a structural schematic diagram of the slide rail 13 of the steel plate in the lifting area. The slide rails are respectively arranged on the steel plate side with a gap between the left and right end plates. After entering the lifting stage, the upper steel plate and the lower steel plate will be stressed due to lack of plane constraints. The upper steel plate and the lower steel plate are warped, and the sliding rail can effectively improve the plane constraints of the upper steel plate and the lower steel plate, and ensure that the upper steel plate and the lower steel plate can fully exert the secondary lifting of the stiffness.

The new assembled variable-rigidity transverse connection energy-consuming damper has been designed in the energy-consuming zone and the lifting stage. The steel plate in the energy-consuming zone has energy-consuming capacity and provides initial stiffness. It can be disassembled and easily replaced after damage. Deformation thresholds are set for the steel plates in the stiffness raising area. When the deformation exceeds the thresholds, two adjacent shear walls enter the second phase of the joint working state to obtain the ability to increase the peak side load capacity.

Example 2

(2) Welded steel plates: Weld the bolt connection plates inside the energy consumption area to the left and right connection end plates, and the steel plates in the lift area to the left and right connection end plates.

(3) Bolt connection: The steel plate in the lifting area is placed parallel to the front and rear buckling restraint plates with high-strength bolts, and then the steel plate in the energy consumption area and the outer bolt connection plate are connected by bolts.

(4) Connect the shear wall: connect the left and right connecting end plates with the combined steel plate shear wall 1 on both sides through high-strength tie rod bolts 3.

Of course, the above contents are only the preferred embodiments of the present invention, and cannot be considered to limit the scope of the embodiments of the present invention. The present invention is not limited to the above examples. Equal changes and improvements made by those skilled in the art within the essential scope of the present invention should all fall within the scope of the patent of the present invention.

Claims

An assembly-type variable stiffness lateral connection energy dissipating member, which is characterized by comprising an energy consumption region (14), a lifting region (15), left and right connection end plates (2) connected to a shear wall, and left and right connection end plates (2). The shear wall is connected by high-strength tie rod bolts (3), the lifting area (15) contains several steel plates, and buckling restraint plates (9) are provided at the front and rear of adjacent steel plates, which are connected by bolts and steel plates, and are provided between adjacent steel plates. The clearance and lifting area (15) is also provided with a threshold control device.
The assembly-type variable stiffness lateral connection energy dissipating member according to claim 1, wherein the steel plate of the lifting area (15) is divided into two pieces.
The assembly-type stiffness-variable laterally connected energy dissipating member according to claim 1, wherein the energy dissipating area (14) comprises a plurality of steel plates, and is connected to the left and right connection end plates (2) by bolt connection plates (4).
The assembly-type variable stiffness lateral connection energy dissipating member according to claim 3, characterized in that the bolt connection plate (4) is located on the inner and outer sides of the steel plate (5) in the energy dissipating area, The bolt connection plate (4) is welded with the left and right connection end plates (2).
The assembly-type variable stiffness lateral connection energy dissipating member according to claim 1, wherein the threshold control device is realized by bolt holes connected to the buckling restraint plate (9) on the steel plate of the lifting area (15), adjacent to each other. Bolt holes in steel plates have different diameters. Bolt holes on one side of the steel plate are larger than the diameter of the screw.
The assembly-type variable stiffness lateral connection energy dissipating member according to claim 1, characterized in that: the bolt hole of the steel plate on one side of the lifting zone (15) is matched with the screw diameter, and the bolt hole diameter of the steel plate on the other side is larger than the screw diameter 2 ~ 3mm.
The assembly-type variable stiffness lateral connection energy dissipating member according to claim 1, wherein the left and right connection end plates (2) are provided with a sliding track (13) matching the steel plate of the lifting area (15).
The assembly-type variable stiffness lateral connection energy dissipating member according to claim 1, characterized in that: two adjacent steel plates of the lifting area (15) are respectively welded to the left and right connecting end plates (2) on one side, and are not welded A gap is provided on one side, and the sliding track (13) is provided on a side of the steel plate on the left and right connection end plates (2) where a gap is left.
The assembly-type variable stiffness lateral connection energy dissipating member according to claim 4, characterized in that: the steel plate (5) in the energy consumption area is made of mild steel or stainless steel, and the steel plate in the lifting area (15) is made of ordinary steel or high-strength steel. .
The method for installing an assembly-type variable stiffness lateral connection energy dissipating member according to claims 4-9, wherein the steps are as follows:

(1) Reserve bolt holes: reserve the design on the steel plate (5) in the energy consumption area, the steel plate in the lifting area (15), the bolt restraint plate (9) and the bolt connection plate (4) in the energy consumption area (14). The size of the bolt holes;

(2) Welded steel plates: Weld the bolt connection plate (4) inside the energy consumption area (14) to the left and right connection end plates (2), and the steel plate in the lifting area (15) to the left and right connection end plates (2), respectively;

(3) Bolt connection: The steel plate in the lifting area (15) and the buckling restraint plate (9) placed parallel to the front and back are bolted, and then the steel plate (5) in the energy consumption area and the outer bolt connection plate (4) are connected by bolts;

(4) Connect the shear wall: connect the left and right connecting end plates (2) and the combined steel plate shear wall (1) on both sides by high-strength tie rod bolts (3).