A kind of sma negative stiffness damping device

Abstract

The invention relates to an SMA negative stiffness damping device. The SMA negative stiffness damping device comprises an upper seat plate, a lower seat plate and a slider between the upper and lower seat plates, the lower side of the upper seat plate has a downward convex arc surface, and the upper side of the lower seat plate has an upper Convex arc surface, the upper side of the slider has a concave arc surface that is concave-convex matched with the convex arc surface of the upper seat plate, and the lower side has an upper concave arc surface that is concave-convex matched with the convex arc surface of the lower seat plate. The shock absorbing device also includes an SMA cable wrapped between the upper seat board and the lower seat board and used for pressing the upper seat board and the lower seat board on the slider. The SMA negative stiffness shock absorbing device of the present invention has self-resetting ability, and the SMA cable has the ability to recover its own deformation, which enables the shock absorbing device to recover its own deformation. The SMA negative stiffness shock absorber utilizes the lower convex arc surface of the upper seat plate and the upper convex arc surface of the lower seat plate to form a negative stiffness effect to reduce the internal stress of the lower structure of the shock absorber.

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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