Superelastic shape memory alloy-friction series composite damper

Abstract

The invention relates to a superelastic shape memory alloy and friction cascade combined damper which comprises a primary main plate, a front auxiliary plate, a right moving bar, a superelastic shape memory alloy wire, a limit sleeve, a left moving bar, high-strength bolts, a secondary main plate, a rear auxiliary plate, friction plates, a clamp and a spring clamp ring. The primary main plate and the secondary main plate are separately disposed on a same plane, and the front auxiliary plate and the rear auxiliary plate are symmetrically arranged outside the main plates. The left moving bar penetrates through the front auxiliary plate, the limit sleeve, the primary main plate, the limit sleeve and the rear auxiliary plate. The right moving bar penetrates through the front auxiliary plate, the primary main plate and the rear auxiliary plate. The spring clamp ring is clamped to the left moving bar and the right moving bar close to the outer surfaces of the front auxiliary plate and the rear auxiliary plate. The superelastic shape memory alloy wire is wound on the left moving bar and the right moving bar and is fixed on the left moving bar through the clamp. The front auxiliary plate which one friction plate is adhered to, the secondary main plate and the rear auxiliary plate which the other friction plate is adhered to are connected through the high-strength bolts. The superelastic shape memory alloy and friction cascade combined damper is capable of automatically regulating operation state of an energy consumption unit and has high energy consumption and a resetting function.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and relates to an energy-dissipating and shock-absorbing device, in particular to a damper capable of automatically adjusting the working state of an energy-consuming unit and having good energy consumption and a certain reset function. Background technique [0002] The damage and collapse of buildings during earthquakes is the main cause of earthquake disasters. The traditional anti-seismic structure resists earthquake action by enhancing the strength, stiffness and ductility of the structure itself, that is, the structure itself stores and consumes seismic energy, which is uneconomical and does not achieve the expected effect. Energy dissipation and shock absorption technology is to connect dampers in parallel in the lateral force-resistant members of the structure, and the dampers consume most of the seismic energy to ensure the safety of the main structure, so it is an active and ef...

AI Technical Summary

Problems solved by technology

[0003] Traditional dampers that have been used in practical engineering have some limitations: viscoelastic dampers have poor fatigue resistance and are prone to aging; viscous dampers are prone to leakage; metal yield dampers need to be updated and replaced after strong earthquakes; friction dampers Poor resetting, which is also the disadvantage of other types of dampers above

The patent with the publication number CN101196017 discloses a technical scheme of a composite shape memory alloy friction damper, that is, a superelastic shape memory alloy wire and a friction damper are combined in parallel to provide good energy dissipation and reset functions. In this scheme, the superelastic shape memory The alloy wire and the friction damper work at the same time, and the working state of the energy dissipation unit cannot be adjusted according to the earthquake intensity and the response of the structure under the earthquake. The performance requirements are determined, so the dosage is large, and the energy dissipation capacity of the superelastic shape memory alloy wire cannot be fully utilized during small earthquakes, and the shape memory alloy material is expensive, so it is uneconomical from a practical point of view

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