Self-limiting reset composite friction pendulum support with variable friction coefficient

Abstract

The invention discloses a self-limiting reset composite friction pendulum support with a variable friction coefficient. The self-limiting reset composite friction pendulum support comprises a first energy dissipation pendulum seat, a central energy dissipation block, a second energy dissipation pendulum seat, a high-damping rubber-spring ring, a viscous damper and a shape memory alloy spring. The device has four energy dissipation mechanisms, the central energy dissipation sliding block is located between the first energy dissipation swing seat and the second energy dissipation swing seat, and the friction coefficients of friction plates between the central energy dissipation sliding block and the first energy dissipation swing seat and between the central energy dissipation sliding block and the second energy dissipation swing seat are sequentially increased from inside to outside; the friction coefficient of the friction plate between the stainless steel sliding plate and the stainless steel supporting plate is sequentially increased from inside to outside; a high-damping rubber-spring ring is arranged on the inner side of the displacement restraint ring; the viscous damper is installed between the first energy dissipation swing seat and the second energy dissipation swing seat in an X-shaped hinged mode. The shape memory alloy springs are installed among the four corners of the first energy dissipation swing seat and the four corners of the second energy dissipation swing seat in a hinged mode. The seismic isolation device can accurately recognize an earthquake, has excellent damping and rigidity self-adaptive adjusting capacity, is high in seismic reduction and energy dissipation capacity, has excellent self-limiting and resetting functions, and belongs to the technical field of seismic isolation.

Description

technical field [0001] The invention relates to the field of shock isolation technology, in particular to a compound friction pendulum bearing with variable self-limiting and reset friction coefficient. Background technique [0002] my country is one of the countries with the most intense seismic activity in the world. During the earthquake, the highway bridges in our country often suffer serious damage, causing huge personal losses and economic losses. Moreover, highway bridges are lifeline projects for earthquake relief. damage will greatly increase the difficulty of earthquake relief. Therefore, in the current bridge construction, it is very important to pay attention to research on improving the seismic performance of bridge structures in active service or under construction. [0003] The friction pendulum bearing is developed from the planar slip isolation system, but the friction coefficient and curvature radius of the traditional friction pendulum bearing are fixed va...

AI Technical Summary

Problems solved by technology

[0004] 1. The friction pendulum support has too few friction surfaces, and the frictional energy dissipation capacity is limited, which will aggravate the loss of friction surfaces

[0005] 2. The friction coefficient, damping, and stiffness of the fri

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