Displacement amplification type self-resetting damper based on shape memory alloy material

Abstract

The invention relates to a displacement amplification type self-resetting damper based on shape memory alloy materials, which comprises a fixed frame, a first connecting rod, a second connecting rod, two SMA tows, a first connecting shaft and a second connecting shaft, and a transmission shaft, a first transmission plate and a second transmission plate are arranged in the fixed frame. When the structure is subjected to the earthquake action, a first connecting shaft and a second connecting shaft at the two ends of the self-resetting damper make axial relative movement, when the connecting shaft moves leftwards, the self-resetting damper is axially compressed, the connecting shaft drives a transmission plate to move leftwards, a limiting piece on the left side edge of a first connecting rod leaves the first connecting rod, and the limiting piece pushes the connecting rod leftwards; and the second connecting rod is driven to rotate clockwise around the two fixing pieces, or vice versa. Displacement of the shape memory alloy is amplified through the lever principle, the length of a lever force arm can be changed, the displacement amplification coefficient can be flexibly adjusted, micro earthquake deformation can be amplified, and an assembly type structure is convenient to maintain and replace.

Description

technical field [0001] The invention relates to a damper, in particular to a displacement-amplifying self-resetting damper based on shape memory alloy materials, and belongs to the technical field of structural vibration and control. Background technique [0002] Under the action of earthquake, the residual strain of the main body of the traditional structure is directly related to the degree of plastic deformation, which has an important influence on the structural function. When the residual displacement angle of the structure after the earthquake is greater than 0.5%, it will lose its repair value. The self-resetting structure of the functional recoverability design concept has received extensive attention. The self-resetting structure allows the structure to produce large plastic deformation under the action of large earthquakes to consume the energy introduced into the structure. The self-resetting support can take into account the functions of energy dissipation and re...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems in the prior art, the present invention provides a displacement amplified self-resetting damper based on a shape memory alloy material to solve the problem of low utilization efficiency and small deformation control effect of the existing shape memory alloy damper. Poor, effective displacement is small and other technical problems

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