铅芯橡胶基础隔震结构在多向地震作用下的分析与研究

本文分别建立了传统结构与隔震结构的三维有限元模型，通过对这两种结构进行动力特性分析和考虑单向、双向、三向地震作用下的动力时程分析，研究多向地震作用对框架结构的影响。研究分析表明：对于水平隔震，在三向坚硬场地波的作用下，结构的反应增大；对于竖向隔震，隔震结构比传统结构的地震响应都要大，且在双向与三向地震动时，结构的层间剪力和底层柱轴力有较大的影响。因此，在进行铅芯橡胶基础隔震设计时，要考虑结构多向地震作用，尤其是竖向地震作用对结构的影响。

Analysis And Research Of The Lead-Rubber Base Isolated Structure Under Multiple-Dimensional Earthquake Action

his thesis aims at establishing the three-dimensional finite element models of traditional structure and isolated structure.Through analyzing these two structures with dynamic characteristics and dynamic time history, this paper will give an explanation about one-dimensional,two-dimensional, three-dimensional earthquake actioning and do research on the effects of multiple-dimensional earthquake action on the structures.Analysis shows that:the response of the structure increases under the action of multiple-dimensional hard site earthquake wave to the horizontal seismic isolation;to the vertical seismic isolation,the arthquake response of the solated structure greater than traditional structure,story shear force and the axial force of bottom columns are bigger with two-dimensional,three-dimensional earthquake actioned.During the design of the Lead-rubber base isolated,it should consider three-dimensional earthquake action,in particular the role of vertical earthquake effects on structures.