SMA negative rigidity damping device

Abstract

The invention relates to an SMA negative rigidity damping device. The SMA negative rigidity damping device comprises an upper seat plate, a lower seat plate and a sliding block located between the upper seat plate and the lower seat plate. The lower side surface of the upper seat plate is provided with a lower convex cambered surface, the upper side surface of the lower seat plate is provided withan upper convex cambered surface, the upper side surface of the sliding block is provided with a lower concave cambered surface which is in concave-convex fit with the lower convex cambered surface of the upper seat plate, the lower side surface of the sliding block is provided with an upper concave cambered surface which is in concave-convex fit with the upper convex cambered surface of the lower seat plate, and the damping device further comprises an SMA cable which surrounds between the upper seat plate and the lower seat plate and is used for pressing the upper seat plate and the lower seat plate on the sliding block. The SMA negative rigidity damping device has a self-resetting capability, and the SMA cable has a capability of restoring self deformation, so that the damping device can restore self deformation. The SMA negative rigidity damping device utilizes the lower convex cambered surface of the upper seat plate and the upper convex cambered surface of the lower seat plate toform a negative rigidity effect, so that the internal stress of the lower structure of the damping device is reduced.

Description

technical field [0001] The invention relates to a shock absorbing device, in particular to an SMA negative stiffness shock absorbing device. Background technique [0002] Since the 1960s, seismic isolation and energy consumption shock absorption technology has gradually attracted the attention of countries all over the world and has been widely used in building structures and bridge structures. Seismic isolation and shock absorption technology is to separate the structure from the ground movement or bearing movement during the earthquake to the greatest extent through the shock isolation and shock absorption device, thereby greatly reducing the seismic action transmitted to the upper structure. A large number of theoretical studies and experience of some seismic damage in isolation projects show that isolation and energy dissipation shock absorption technology is one of the most stable and effective control technologies so far. The engineering structure has withstood the te...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides an SMA negative stiffness shock absorber to solve the technical problem that the SMA shock absorber in the prior art is easily damaged due to large internal force response

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