Movable support with seismic isolation and reduction functions

Abstract

A movable support with the seismic isolation and reduction functions comprises an upper supporting board, a base, a first supporting assembly and a second supporting assembly, wherein the first supporting assembly and the second supporting assembly are arranged between the upper supporting board and the base. The first supporting assembly comprises a metal damper, sliding blocks and a speed governor; the upper end of the metal damper is fixed to the upper supporting board; the sliding blocks are installed on sliding rails of the base and can slide along the sliding rails in a reciprocating mode; the lower end of the metal damper is rotationally and movably connected with the sliding blocks; the sliding blocks can drive the metal damper to slide along the sliding rails; the speed governor is arranged between the base and the sliding blocks and used for generating a damping action on the sliding of the sliding blocks along the sliding rails, so that the sliding blocks only slides along the sliding rails slowly. The second supporting assembly is movably supported between the upper supporting board and the base, and plane sliding, curved face sliding and / or rotation between the upper supporting board and the base are provided. The damping function is generated when relative acceleration motion occurs between a structure and a foundation, the relative movement distance can be controlled, the size is small, the structure is simple, and the movable support can be used in the fields such as seismic isolation and reduction of statically indeterminate structure bridges.

Description

technical field [0001] The invention relates to a movable bearing with shock-absorbing and isolating functions, in particular to a movable bearing with a large bearing capacity and the ability to share earthquake force, which is mainly used in the support of structures such as bridges and buildings. Background technique [0002] In the previous seismic design of bridges, buildings and other structures, the "resistance" design method was mainly adopted, that is, the structure was considered as a rigid body. The strength of the part must be able to bear the inertial force generated by the mass of the structure itself. In the high-intensity earthquake area, when the structure is designed according to the "resistance" method, the size of the structure is very large, and a high economic price is paid for a small probability event. However, paying a high economic price does not necessarily exchange for the absolute safety of the structure against earthquakes. [0003] In order to...

AI Technical Summary

Problems solved by technology

The existing movable bearing design cannot bear horizontal load in its moving direction, so it cannot share a certain horizontal seismic force with other bearings

At present, the types of bearings with shock absorption and isolation functions are mainly fixed bearings that can bear horizontal loads. However, for bridges with structural types such as multi-span continuous beams, since the whole bridge can only have one fixed pier to install fixed bearings, in In most cases, it is far from enough that only one fixed support of a fixed pier bears the shock absorption and isolation function of the whole bridge and that one fixed pier bears all the seismic loads in a certain direction.

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