多维地震动作用下基础隔震结构地震响应分析

本文分析了多维地震动作用下基础隔震结构平动扭转耦联振动反应。结果表明 ,采用等效线性化的假设是合理可行的。基础隔震结构在地震动扭转分量作用下 ,其反应均比无扭转分量作用时大 ,但采用基础隔震 ,且隔震层无偏心时 ,结构响应降低。

The seismic response of the horizontal and torsional coupling vibration of a base isolated structures under multi?component ground motion excitation is analyzed in this paper .Calculating results show that the assumption of equivalent linearization is rational and feasible.For a based isolated structure,the response due to the torsional component of the ground motion is always larger that the one without torsional component.If the base is isolated and there is no eccentricity in the isolation layer,then the structural response will be reduced.This shows the base isolation technique can effectively reduce the structural response due the joint action of horizontal and torsional components of the ground motion excitaiton.