福州大学学报（自然科学版）2017，Vol.45Issue(4)：486-492,7.DOI:10.7631/issn.1000-2243.2017.04.0486
考虑不均匀沉降的大跨网架结构地震反应分析
Seismic response analysis of long-span grid structure considering uneven settlement
摘要
Abstract
A method of installing different isolation bearings on the top of the column was preset to reduce the structural seismic response under uneven settlement,according to the negative influence of uneven settlement on the seismic response of long-span grid structure.Numerical models of long-span grid structures were established.Modal analyses of the aseismic grid structure,horizontal isolated grid structure and three-dimensional isolated grid structure were performed,their dynamic characteristics were analyzed and compared.Coupling uneven settlement and earthquake action,numerical analyses were performed,then horizontal and vertical seismic responses of the three structures were obtained.Analysis results indicate that uneven settlement causes inner force redistribution,makes different bars have different additional stresses.Uneven settlement amplifies the seismic reactions of the structures,and reduces the isolation effects.Three-dimensional isolation bearing has small vertical stiffness,it can adapt to the vertical displacement that uneven settlement brings about.It has vertical isolation effects for the vertical ground motions,even there is uneven settlement,while horizontal isolation bearing do not have.关键词
不均匀沉降/大跨网架结构/水平地震作用/竖向地震作用/三维隔震/地震反应分析Key words
uneven settlement/long-span grid structure/horizontal earthquake action/vertical earthquake action/three-dimensional isolation/seismic response analysis分类
建筑与水利引用本文复制引用
颜学渊,王秀珠..考虑不均匀沉降的大跨网架结构地震反应分析[J].福州大学学报（自然科学版）,2017,45(4):486-492,7.基金项目
国家自然科学基金资助项目(51578160) （51578160）
福建省教育厅科技资助项目(JA15050) （JA15050）
福建省高校杰出青年科研人才计划资助项目(810104) （810104）
