X-type anisotropism friction double-pendulum vibration reduction and isolation support

Abstract

The invention discloses an X-type anisotropism friction double-pendulum vibration reduction and isolation support which comprises an upper seat board, a lower seat board, an upper hinged sliding block, a lower hinged sliding block, an upper wear-resisting board, a lower wear-resisting board, a spherical surface wear-resisting board, a dust cover, a bolt and the like. The upper seat board and the lower seat board are in an X type. The outer sides are planes, the inner sides are concave hook faces, and the concave hook faces, long edge stop blocks and short edge stop blocks form grooves. Sphere center sliding blocks are arranged inside the grooves and are formed by hinging and combining the upper hinged sliding block and the lower hinged sliding block through the spherical hook faces. Due to the fact that the curvature radius, length, friction coefficients and the like of the groove of the upper seat board and the groove of the lower seat board are set differently, vibration reduction and isolation rigidity, displacement, damping and the like in different directions are different, and the performance-based anisotropism vibration reduction and isolation design of bridges can be achieved through horizontal rotation and vertical rotation of the sphere center sliding blocks. The support has the advantages that the anisotropism vibration reduction and isolation design of the bridges can be achieved, the vibration reduction and isolation mechanism is clear, and the support is applicable to straight, oblique crossing and other bridges and is more economical.

Description

technical field [0001] The invention relates to an X-type anisotropic friction double pendulum vibration-reducing and isolation bearing of a bridge structure. Background technique [0002] In recent years, frequent earthquakes have occurred around the world, causing a large number of structural damage, casualties and economic losses. Once a bridge project as a transportation hub is seriously damaged in an earthquake, it will not only cause huge direct losses, but also bring great difficulties to the disaster relief work, which will cause serious secondary disasters and environmental damage. Super-large bridges will also cause great social impact. Therefore, in order to ensure the safety of bridges, especially the seismic performance of long and large bridges located in more seismically active areas, it is necessary to design the seismic performance of bridge structures to improve their safety. [0003] Seismic isolation design is one of the effective ways to improve the se...

AI Technical Summary

Problems solved by technology

However, the traditional friction pendulum bearing has the following disadvantages: the upper and lower base plates of the traditional friction pendulum bearing are circular, and the shock absorption and isolation stiffness in all directions provided by the bearing is exactly the same. (such as the longitudinal bridge direction and the transverse bridge direction) to carry out the shock absorption and isolation design based on performance requirements, which does not have anisotropic shock absorption and isolation functions; for curved bridges and oblique bridges, traditional friction pendulum bearings cannot It meets the random rotation of the bearings caused by the vibration of the main girder structure caused by the earthquake, and at the same time meets the seismic isolation performance requirements in different directions of the bridge structure. Therefore, it cannot meet the seismic isolation design of curved bridges and skew bridges; Traditional friction pendulum bearings are large in size, high in cost, and have high requirements for the size of the bottom of the main beam of the bridge, the cover beam, etc.

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