Parameter changeable friction pendulum seismic isolation bearing

Abstract

The invention discloses a parameter changeable friction pendulum seismic isolation bearing. The parameter changeable friction pendulum seismic isolation bearing comprises a lower bearing plate, an upper bearing plate and a hinged sliding block; a first arc surface is arranged on the part, facing downwards, of the upper bearing plate, a second arc surface is arranged at the end, close to the upperbearing plate, of the hinged sliding block, and the hinged sliding block can rotate relative to the upper bearing plate while the hinged sliding block slides on the upper bearing plate through matching of the first arc surface and the second arc surface; and a fourth arc surface is arranged on the part, facing upwards, of the lower bearing plate, a third arc surface is arranged at the end, close to the lower bearing plate, of the hinged sliding block, and the hinged sliding block slides in the lower bearing plate through matching of the third arc surface and the fourth arc surface. According to the parameter changeable friction pendulum seismic isolation bearing, the bearing rigidity and the friction factor are both increased along with development of bearing relative displacement, the parameter changeable friction pendulum seismic isolation bearing has self-adaptivity for the seismic working condition, good seismic isolation performance can be achieved under the small seismic condition, and under the large seismic condition, structure destroy caused by large bearing relative displacement is avoided.

Description

technical field [0001] The invention belongs to the field of shock-isolation technology, and relates to a shock-isolation support, in particular to a variable-parameter friction pendulum shock-isolation support. Background technique [0002] Seismic isolation technology is one of the most effective measures to reduce the damage of structural earthquakes. The basic idea is to install a flexible isolation layer with sufficient reliability between the foundation and the superstructure to prolong the natural vibration period of the structure and increase the damping to reduce the seismic energy. passed to the upper structure. This technology has been widely used, and its effectiveness has been verified by many earthquakes. [0003] Although the traditional friction pendulum bearing is a relatively efficient seismic isolation device, in actual engineering, since the bearing parameters (friction coefficient, effective swing radius) are constant, it is usually a long-period dynami...

AI Technical Summary

Problems solved by technology

However, when the bearing encounters a large earthquake, especially a pulse-type near-fault earthquake, the phenomenon of excessive displacement of the bearing often occurs, and the long-period seismic response may be amplified, causing greater damage to the superstructure

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