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中文摘要：
为研究基础隔震结构初始局部破坏引起的动力效应和动力效应影响区域,本文采用瞬时卸栽法对基础隔震结构进行了动力连续倒塌分析。使用SeismoStruct软件建立有限元模型,以发生局部失效后的结构与原结构的梁端弯矩比、柱轴力比、梁内轴力及支座位移为指标,分析了动力效应作用区域。研究表明,角部构件失效后上部节点的竖向位移较大,更容易发生连续倒塌;局部构件失效后对剩余结构产生的影响以失效点为中心向四周递减,对相邻短跨方向构件的动力影响大于长跨方向构件;由于隔震支座失效使隔震层抗侧刚度减弱,所以相比底层柱失效,隔震支座失效会使隔震层产生较大的位移。
英文摘要：
To study the dynamic effect and acting area resulted from the initial damage to the isolated-structure,the dynamic progressive collapse analysis of isolated-structure was carried out with transient unloading method.In this paper,the finite element model was set up by SeismoStruct,and the bending moment ratio of beam 、 the axial forces ratio of column、 beam axial force and bearing displacement were taken as indexes to analyze the area of dynamic effect.The results showed that the vertical displacement of the upper joint is larger after the failure of the corer member,so the collapse is more likely to occur in this situation;The influence of the local failure on the residual structure is to decrease around the failure point,and the influence on adjacent components in short span direction is greater than that in long span direction.Compared with the failure of the bottom column,the isolation bearing failure will cause a larger displacement of the isolation layer,because the lateral stiffness of the isolation layer is weakened after isolation bearing failure.
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