摘要
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。
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,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 is will given.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.
出处
《科学技术与工程》
2010年第29期7176-7180,7195,共6页
Science Technology and Engineering
关键词
铅芯橡胶支座
基础隔震结构
多向地震
地震作用
lead-rubber bearing base-isolated structure multiple-dimensional earthquake earthquake action
