基于位移输入法结构竖向多点激励 FPS支座隔震效果研究  

Research on Seismic Isolating Effect for FPS Bearing Based on Displacement Input Method Structure Vertical Multi-point Excitation of Earthquake Waves

作　　者：王浩霆 葛楠 韩流涛 于建东 WANG Hao-ting;GE Nan;HAN Liu-tao;YU Jian-dong(College of Civil and Architectural Engineering,North China University of Science and Technology,Tangshan Hebei 063210,China)

机构地区：[1]华北理工大学建筑工程学院,河北唐山063210

出　　处：《华北理工大学学报（自然科学版）》2023年第1期66-74,共9页Journal of North China University of Science and Technology：Natural Science Edition

基　　金：国家自然科学基金项目(51578029);河北省研究生创新项目(CXZZBS2017124)。

摘　　要：以单层圆柱面大跨度空间网架结构为研究对象,基于直接位移法,应用SAP2000有限元软件建立竖向多点激励动力反应时程分析模型,并进行结构在竖向地震动一致激励和多点激励作用下的动力反应分析计算。结果表明:采用多点激励输入模式是十分必要的。无隔震时,多点激励作用下,对较小的波速,支撑柱弯矩、剪力增加明显;柱顶位移也有所增加。有隔震时,边柱弯矩减震效率为69%~73%左右,边柱剪力减震效率为54%~65%左右;次边柱轴力增加明显。Takinga single layer cylindrical reticulated shell large span structure as the research object,based on displacement input method,an analytical seismic dynamic model under multi-point vertical excitation was establishedby using SAP2000 finite element software.The seismic dynamic response for consistent vertical excitation and multi-point vertical excitation from wave propagation were analyzed and calculated respectively.The results show that it is necessary to apply multi-point excitation for seismic dynamic analysis.Without seismic isolation,the column moments and shears will show notable increases for small wave velocity,with increasing in column top displacements.When with seismic isolation,the mitigation efficiency could reach about 69%-73%for column moments and could reach about 54%-65%for column shears;Otherwise the axial forces for the secondary columns increased notably.

关 键 词：空间网架结构 多点激励 时程分析 FPS摩擦摆支座 大质量法 

分 类 号：TU393.3[建筑科学—结构工程]