Mixed mode shape memory alloy frictional damper

Abstract

The invention relates to a compound type memory alloy friction damper, which is mainly composed of a main board, a sub board, a friction plate, a hyperelastic shaped memory alloy wire, a resetting pulling rod, a U-shaped pre-strained adjusting plate and a high strength bolt. The invention is characterized in that the friction plate is inserted between the main board and the sub board, a bolt movable hole and a pulling rod movable hole are reserved on the main board, and a bolt hole and the pulling rod movable hole are reserved on the sub board and the friction plate; the high strength bolt penetrates through the bolt hole on the sub board and the friction plate and the bolt movable hole on the main board; the resetting pulling rod penetrates through the pulling rod movable hole on the main board, the sub board and the friction plate; the hyperelastic shaped memory alloy wire penetrates through the resetting pulling rod and the U shaped pre-strained adjusting plate, and the both ends are respectively pulled tightly and fixed with a clamping device, the interval between the U shaped pre-strained adjusting plate and the resetting pulling rod is adjusted through an adjusting bolt, to ensure the hyperelastic shaped memory alloy wire to reach the required initial strain. The invention has the advantages that the capacity of the energy dissipation is strong, the resetting is automatic, the structure type is simple, and the invention is convenient for the application of the engineering.

Description

technical field [0001] The invention belongs to the anti-vibration technical field of civil engineering structures and relates to a composite shape memory alloy friction damper. Background technique [0002] Earthquakes and strong winds pose a serious threat to the safety and comfort of civil engineering structures. How to effectively reduce the response of engineering structures under dynamic loads such as earthquakes and strong winds, and improve the seismic and wind resistance of structures is one of the problems that need to be solved urgently in the discipline of civil engineering. The traditional method is to rely on improving the stiffness, strength and ductility of the structure itself to resist the effects of earthquakes and wind vibrations. However, under the action of strong earthquakes or strong winds, this passive method will inevitably lead to damage or destruction of some structural members. It is not economical and can not achieve the expected effect, but mo...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a composite shape memory alloy friction damper, the purpose of which is to solve the problems of the existing shape memory alloy damper with low energy dissipation capacity and the residual displacement of the friction damper, and to provide a kind of energy dissipation capacity with strong energy dissipation and self-dissipation Reset function, simple structure, suitable for passive energy dissipation dampers in engineering applications

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