Super-elastic multi-stage matching friction limiting energy dissipation device for controlling residual displacement of structural node

Abstract

The invention discloses a super-elastic multi-stage matching friction limiting energy dissipation device for controlling residual displacement of a structural node. The device is composed of a tensionand pressure rod, a connecting head, a sawtooth-shaped semi-cylinder, a metal rubber cylinder, a metal rubber round strip, a metal rubber circular cushion block, a metal cylinder and a metal round rod. When an earthquake occurs, the tension and pressure rod starts to reciprocate in the axial direction, sawtooth-shaped grooves which are in a complete meshing state originally and with different depths are dislocated, the sawtooth-shaped semi-cylinder starts to extrude the metal rubber cylinder outside the sawtooth-shaped semi-cylinder, and the metal rubber cylinder applies the force on the sawtooth-shaped semi-cylinder, so that the sawtooth-shaped grooves play the large friction energy dissipation action when dislocated, and the different depths of the grooves can achieve the purpose of staged energy dissipation. By means of an embedded part, the force can be transmitted to a building structure itself, the reciprocating displacement generated by the structure under the earthquake is reduced, the residual displacement of the post-earthquake structure is then reduced, and the purpose of controlling the residual displacement of the structure node is achieved.

Description

technical field [0001] The invention relates to a super-elastic multi-level friction limiter for controlling the residual displacement of structural nodes. Under the action of an earthquake, the multi-level friction device and metal rubber are used for energy consumption and shock absorption, and at the same time, the super-elasticity of the metal rubber is used. Significantly reduce the residual displacement of the frame structure nodes after the earthquake. The invention belongs to the field of anti-shock and shock-absorbing technology of civil engineering. Background technique [0002] Building structures will inevitably be damaged and damaged to varying degrees under the action of earthquakes, resulting in a large number of economic losses and casualties. In order to reduce the response of structures under the action of earthquakes and reduce casualties and property losses, a large number of experts and scholars at home and abroad have developed different types of energ...

AI Technical Summary

Problems solved by technology

Even after the normal function of the building structure is restored, the large residual displacement angle will cause the residents to clearly perceive the tilt of the building, causing psychological symptoms of panic and discomfort, which seriously affect the daily life of the residents

[0005] At present, the dampers used to reduce the seismic response of structures cannot fully achieve the purpose of controlling the residual deformation of structures after earthquakes, especially the displacement-related dampers represented by metal dampers

This type of damper dissipates seismic energy through deformation under earthquake action, but it enters a failure state after deformation, and cannot reduce the reciprocal displacement of the building structure under long-term earthquakes, and reduce the residual displacement of the structure after the earthquake

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