CN217379953U

CN217379953U - Bending-shearing coupling type metal damper

Info

Publication number: CN217379953U
Application number: CN202123049429.4U
Authority: CN
Inventors: 邱灿星; 张爱芳; 姜天缘; 杜修力
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-09-06
Anticipated expiration: 2031-12-07

Abstract

The utility model discloses a curved scissors manifold type metal damper, including shearing steel sheet, crooked steel sheet and last lower header. Including bent steel plates, sheared steel plates, and end plates. The two end plates are arranged in parallel up and down, the top and the bottom of the shearing steel plate are respectively welded between the two end plates, and the bending steel plates are symmetrically distributed on two sides of the shearing steel plate in parallel. The energy dissipation mechanism of the damper comprises bending deformation of a bent steel plate and shearing deformation of a sheared steel plate, so that the damper has high energy dissipation capacity; in addition, the damper can have a large post-yield stiffness ratio by reasonably designing the parameters such as the sizes, materials and the like of the bent steel plate and the sheared steel plate, so that the residual deformation is effectively reduced. The utility model has the advantages of simple structure, easy processing, easy loading and unloading, strong energy consumption capability, strong deformation recovery capability and the like.

Description

Bending shear coupling type metal damper

Technical Field

The utility model relates to a bent coupling type metal damper of cutting belongs to civil engineering structure shock attenuation technical field, and concretely relates to metal damper who is applied to in the structural engineering field can reduce seismic response for the structure, realizes the easy ability of resetting.

Background

In earthquake-prone areas, the safety of buildings under the action of earthquakes is always a major concern for people. The traditional earthquake-resistant method for buildings resists earthquake by the deformation of the structure, and although the application range is wide, the structure is greatly damaged. By adding the damper component into the building structure, the damper is utilized instead of the structure as an energy dissipation element, and the damper component plays an important role in improving the overall anti-seismic performance of the building.

The metal damper has the advantages of simple structure, low cost, stable performance, convenient manufacture, convenient replacement and the like, and is widely applied to engineering. Various types of metal dampers can be classified into shear type dampers and bending type dampers. The shear type damper consumes energy by utilizing shear plastic deformation of a metal plate, such as a shear plate damper and the like. The bending damper consumes energy by utilizing the bending plastic deformation of the metal plate, such as an X-shaped steel plate damper, a triangular steel plate damper, a U-shaped steel plate damper and the like. The K-shaped bent steel plate damper has the advantages of large plastic deformation, good durability, full hysteresis curve, stable performance and the like, but has larger residual deformation after unloading, so that the structure is difficult to repair after earthquake, and the shock resistance and the toughness are not easy to realize. The utility model provides a curved coupling type metal damper that cuts combines crooked steel sheet and shearing steel sheet rationally, can improve the power consumption ability of attenuator to improve the hysteresis performance of attenuator. The shearing steel plate and the bending steel plate are respectively subjected to section optimization design according to the distribution of shearing force and bending moment, and the optimized shearing steel plate and the optimized bending steel plate are respectively in a two-side weakening type and a K type. The energy dissipation mechanism of the damper comprises bending deformation of a bent steel plate and shearing deformation of a sheared steel plate, so that the damper has high energy dissipation capacity; by designing the parameters such as the size, the material and the like of the bent steel plate and the sheared steel plate, the damper can have a larger post-yield stiffness ratio, so that the residual deformation is reduced.

SUMMERY OF THE UTILITY MODEL

In order to strengthen the power consumption ability of metal damper to improve its ability of restoreing the deformation, the utility model provides a curved coupling type metal damper that cuts compares with ordinary metal damper, and this attenuator power consumption ability is stronger with the ability of restoreing the deformation, and residual deformation is less, can effectively improve structure shock resistance toughness.

The utility model discloses cut steel sheet and crooked steel sheet all with the welding of upper and lower end plate, crooked steel sheet symmetric distribution is in the both sides of cuting the steel sheet. When the damper is subjected to horizontal displacement, the upper end plate and the lower end plate generate relative displacement, the shearing steel plate generates in-plane shearing deformation, and the bending steel plate generates out-plane bending deformation. The energy dissipation mechanism of the bending-shearing coupling type metal damper is composed of shearing deformation of a shearing steel plate and bending deformation of a bending steel plate, so that the bending-shearing coupling type metal damper has higher energy dissipation capacity. By designing relevant parameters of the bent steel plate and the sheared steel plate, the rigidity of the damper after yielding is larger, so that the residual deformation of the damper is effectively reduced.

In order to realize the purpose, the utility model discloses following technical scheme has been taken:

a bending-shearing coupling type metal damper comprises a bending steel plate (1), a shearing steel plate (2) and an end plate (3). Two end plates (3) are arranged in parallel from top to bottom, the top and the bottom of the shearing steel plate (2) are respectively welded between the two end plates (3), and the bending steel plates (1) are symmetrically distributed on two sides of the shearing steel plate (2) in parallel to prevent the shearing steel plate (2) from buckling and instability outside the plane.

Furthermore, the upper end plate (3) and the lower end plate (3) are provided with bolt holes so that the bending shear coupling type metal damper and the damping structure can be connected through bolts.

Furthermore, compared with the common steel plate, the cross section of the bent steel plate (1) is optimized, and the bent steel plate has the characteristics of full hysteresis curve, strong energy consumption capability and uniform plastic distribution, can give full play to material performance, and improves the material utilization rate.

Further, the width of the two sides of the shearing steel plate (2) and the width of the two sides of the bending steel plate (1) are larger than the width of the middle of the shearing steel plate (2), and the width of the two sides gradually changes towards the middle of the bending steel plate (1).

When the lower end plate (3) of the damper is fixed and the upper end plate (3) is subjected to horizontal load, relative displacement in the horizontal direction occurs between the two end plates (3), so that the bent steel plate (1) enters a bending state, the shearing steel plate (2) enters a shearing state, the bent steel plate (1) reaches a yield point firstly by designing the size, the material and other parameters of the bent steel plate (1) and the shearing steel plate (2), and the plate width of the bent steel plate (1) is linearly changed from the middle height to the two ends, so that yield of all points of the bent steel plate (1) can be realized simultaneously. The shear steel plate (2) enters a yielding state with the increase of the displacement. After the steel plate (2) is sheared, the yield rigidity ratio of the damper is increased. The shear type metal damper and the bending type metal damper are reasonably combined, and the residual deformation of the dampers is effectively reduced due to the increase of the rigidity ratio after yielding. Due to the fact that the shearing deformation energy consumption of the shearing steel plate (2) and the bending deformation energy consumption of the bending steel plate (1) are achieved, compared with a common metal damper, the damper has better energy consumption capacity.

Compared with the prior art, the utility model has the advantages as follows:

(1) the utility model discloses according to the shear force distribution of shearing the steel sheet and the moment of flexure distribution of crooked steel sheet respectively, carried out optimal design to their cross-section. The optimized shearing steel plate and the optimized bending steel plate are respectively in a two-side weakened type and a K type.

(2) The utility model discloses a plurality of K type crooked steel sheets, its hysteresis curve is full, and the power consumption ability is strong, and plastic distribution is even, and at the power consumption in-process, the each point of crooked steel sheet gets into plastic deformation simultaneously, and full play material property improves material utilization.

(3) The utility model discloses damper's power consumption mechanism includes the bending deformation of crooked steel sheet and the shear deformation of shearing the steel sheet, compares and has better power consumption ability in ordinary metal damper.

(4) The utility model discloses the attenuator adopts the curved coupling form of cutting, through the crooked steel sheet of design and the relevant parameter of shearing the steel sheet, can realize reducing the purpose of attenuator residual deformation.

(5) The utility model discloses can adjust the rigidity and the intensity of attenuator through the design parameter who changes crooked steel sheet and shear steel sheet, make it satisfy actual demand.

(6) The utility model discloses the attenuator passes through the bolt and links to each other with the structure, is convenient for change and restore after shaking, reduces economic loss.

Drawings

Figure 1 is a damper assembly schematic.

Figure 2 is a schematic front view of the damper.

Figure 3 is a side schematic view of the damper.

Fig. 4 is a schematic view of a bent steel plate.

Fig. 5 is a schematic view of a sheared steel plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the bending shear coupling type metal damper is applied as follows:

firstly, a shearing steel plate (2) is welded between an upper end plate and a lower end plate, and then bending steel plates (1) are symmetrically arranged on two sides of the shearing steel plate (2), are in contact with the shearing steel plate (2), and are welded with the upper end plate and the lower end plate (3). The upper and lower end plates (3) are connected with the structure through bolts. The shearing steel plate (2) and the bending steel plate (1) are welded between the two end plates (3).

The shearing steel plate and the bending steel plate are respectively subjected to section optimization design according to the distribution of shearing force and bending moment, and the weakened shapes on the two sides of the shearing steel plate and the two sides of the bending steel plate after optimization are K-shaped. The width of the bent steel plate changes linearly from the middle height to the two ends, and the bent steel plate smoothly transits at the middle height.

The bent steel plates are welded with the upper end plate and the lower end plate, are symmetrically distributed on two sides of the shearing steel plate and are in contact with the shearing steel plate. The bent steel plate is welded only to the end plate and not to the sheared steel plate.

The upper and lower end plates are connected to the structure by bolts.

The shearing steel plate and the bending steel plate are subjected to section optimization design according to the distribution of shearing force and bending moment respectively, so that all sections of the steel plates are simultaneously yielded, and the upper end plate and the lower end plate are provided with holes for bolt connection. The shearing steel plate and the bending steel plate are welded with the upper end plate and the lower end plate. The bent steel plates are symmetrically distributed on two sides of the shearing steel plate, and the effect of preventing the shearing steel plate from buckling and instability outside the plane is achieved. The damper and the structure are connected through the bolt, and the damper is easy to repair and replace after an earthquake. The energy dissipation mechanism of the damper comprises bending deformation of a bent steel plate and shearing deformation of a sheared steel plate, so that the damper has high energy dissipation capacity; in addition, the damper can have a larger post-yield stiffness ratio by reasonably designing the parameters such as the sizes and materials of the bent steel plate and the sheared steel plate, so that the residual deformation is effectively reduced. The utility model has the advantages of simple structure, easy processing, easy loading and unloading, strong energy consumption capability, strong deformation recovery capability and the like.

Claims

1. The utility model provides a curved scissors coupling type metal damper which characterized in that: comprises a bending steel plate (1), a shearing steel plate (2) and an end plate (3); the two end plates (3) are arranged in parallel up and down, the top and the bottom of the shearing steel plate (2) are respectively welded between the two end plates (3), and the bending steel plates (1) are symmetrically distributed on the two sides of the shearing steel plate (2) in parallel; the two sides of the shear steel plate (2) and the bending steel plate (1) are weakened to be K-shaped; the plate width of the bent steel plate (1) is linearly changed from the middle height to two ends, and the plate width is smoothly transited at the middle height;

the widths of the two sides of the shearing steel plate (2) and the bending steel plate (1) are larger than the width of the middle of the shearing steel plate and the bending steel plate, and the two sides gradually change towards the middle.

2. The bending shear coupled metal damper according to claim 1, wherein: the upper end plate (3) and the lower end plate (3) are provided with bolt holes.