Large-scan bridge seismic mitigation and isolation system

Abstract

The invention provides a large-scan bridge seismic mitigation and isolation system comprising two main seismic mitigation assemblies which are symmetrically arranged in the longitudinal direction of the bridge surface. Each main seismic mitigation assembly comprises a spherical supporting seat, a transverse damper for transverse energy consumption and a longitudinal damper for longitudinal energy consumption, wherein the spherical supporting seat is internally provided with a shearing force piece. The large-scan bridge seismic mitigation and isolation system has the advantages that longitudinal and transverse seismic mitigation of a bridge is achieved, and the anti-seismic performance requirement of the bridge is met.

Description

technical field [0001] The invention relates to the field of vibration reduction and isolation of bridges, in particular to a large-span bridge vibration reduction and isolation system. Background technique [0002] Earthquake is a serious natural disaster faced by human society. According to statistics, an average of about 5 million earthquakes occur on the earth every year, among which, destructive earthquakes above magnitude 5 account for about 1,000 times. In addition to causing casualties, earthquakes also bring huge economic and property losses to human beings. Most cities are threatened by earthquakes. As a lifeline project, long-span bridges generally cannot collapse during earthquakes, so measures must be taken to improve the seismic performance of bridges. In order to solve the above technical problems, in high-intensity earthquake areas, long-span bridges generally adopt seismic isolation systems between the bridge girder body and bridge piers. In this case, th...

AI Technical Summary

Problems solved by technology

In order to solve the above technical problems, in high-intensity earthquake areas, long-span bridges generally adopt seismic isolation systems between the bridge girder body and bridge piers. In this case, the seismic design of bridges is often difficult to meet the design requirements; while the existing long-span semi-floating system bridges generally use lead core rubber bearings or high damping rubber bearings or elastoplastic steel shock absorbing bearings, but When the bearing bears a large vertical load, the lead rubber bearing and high damping rubber bearing often have a large plane size, which requires a high installation space for the bridge, and when the bearing bears a large horizontal load, the elastic The plane size of the plastic steel shock absorber will also be larger, and there is also the problem of high installation space requirements

Images