Two-way variable-camber friction pendulum earthquake insulation bearing

Abstract

The invention relates to a two-way variable-camber friction pendulum earthquake insulation bearing, and belongs to the technical field of earthquake insulation. The two-way variable-camber friction pendulum earthquake insulation bearing mainly comprises an upper bearing baseplate, a lower bearing baseplate, an upper metal sliding plate, a lower metal sliding plate, an upper sliding friction plate, a lower sliding friction plate, an upper sliding block, a lower sliding block, an upper sliding block accommodating cavity, a lower sliding block accommodating cavity and a limiting plate. The two-way variable-camber friction pendulum earthquake insulation bearing disclosed by the invention aims to improve the earthquake insulation property of large-scale engineering structures under the effect of earthquake motion, based on the summary of large-scale earthquake insulation engineering structures, the equivalent stress of the sliding friction plates is controlled, the situation that the stress is excessively centralized is avoided, the working properties of sliding friction composite materials are improved, and the problems of variable-camber friction pendulum earthquake isolation engineering structures are solved. Compared with conventional earthquake isolation bearings, the two-way variable-camber friction pendulum earthquake insulation bearing disclosed by the invention has the advantages that the structure is simple, the force transmitting path is clear, the anti-drawing property is good, the durability is good, the vertical bearing force is large, the self-reset function is strong, the effect of earthquake insulation is good, and the two-way variable-camber friction pendulum earthquake insulation bearing disclosed by the invention is suitable for important earthquake insulation engineering structures.

Description

Technical field: [0001] The patent of the invention belongs to the technical field of vibration control of engineering structures, and relates to a two-way variable curvature friction pendulum shock-isolation bearing, which aims to improve the shock-isolation performance of large-scale engineering structures under the action of earthquake vibrations, and is mainly used in bridge engineering, nuclear power plant engineering, large-scale pressure Containers, some high-rise buildings and towering structures and other major practical engineering structures. Background technique: [0002] Since the friction pendulum isolation bearing (FPB / FPS) was proposed by Zayas in the United States in 1985, the friction pendulum isolation has a strong self-limiting function, self-resetting ability, anti-torsion ability, and low cost. Durable, simple construction, excellent shock isolation and energy consumption mechanism and other advantages, it has been successfully applied to major engineer...

AI Technical Summary

Problems solved by technology

[0004] FPB maximum residual displacement x max It is determined by the coefficient of friction and the radius of curvature of the slideway, when x max At a certain time, the larger the radius of curvature of the slideway, the better the isolation effect, and the smaller the friction coefficient μ, but it is not suitable to consume the energy input into the engineering structure; the larger the friction coefficient, the smaller the radius of curvature of the slideway, and the worse the isolation effect , the radius of curvature of the FPB slideway can reach 9m, that is, the isolation period is 6s, but the self-resetting function is poor

Images