地铁换乘站不规则结构对其地震响应的影响  

Influence of irregular structure of subway transfer station on its seismic responses

作　　者：袁蕾[1] 姜忻良[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《地震工程与工程振动》2011年第1期74-79,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金重大研究计划项目(90815025);国家自然科学基金项目(50878143);天津市应用基础及前沿技术研究计划项目(09JCZDJC25300)

摘　　要：地铁换乘站由于功能要求,多为复杂的不规则结构。本文通过对一具有实际工程背景的地铁换乘站进行地震响应弹塑性时程分析,着重从结构的位移响应、侧向变形以及结构柱的内力响应等方面考察了不规则结构对其地震响应的影响。结果表明:周围土体的约束作用有利于减轻地下不规则结构的扭转效应;结构的竖向不规则性对地震响应产生的影响不仅与结构竖向刚度突变有关而且还与周围土体对结构的约束差异有关;地下不规则结构会引起较明显的应力集中现象。相关结论可为类似地下工程的抗震设计提供参考。The subway transfer stations are mostly complex irregular structures in order to meet the functional requirements.By means of the seismic elasto-plastic time-history analysis of a subway transfer station based on practical engineering,the influence of irregular structure on its seismic responses is investigated in this paper from the respects,such as the structural displacement responses,the structural lateral deformations and the internal force responses of structure columns.The results show that the restriction effects of soil around is favorable for lightening the torsional effect of the irregular underground structure;the influence of the structure＇s vertical irregularity on its seismic responses is not only due to the abruptness of vertical stiffness,but also due to the different restriction effect of soil around;the irregular underground structure tends to induce the stress concentration with seismic effect.The related conclusions can also provide reference for the aseismatic design of similar underground constructions.

关 键 词：地铁车站 地下结构 不规则结构 地震响应 三维有限元分析 ANSYS软件 

分 类 号：P315.952.6[天文地球—地震学] TU93[天文地球—固体地球物理学]