浅埋地下结构顶板在竖向地震作用下的动力响应  

Dynamic response of the roof slab of a shallowly buried underground structure under vertical seismic excitation

作　　者：陈灿寿[1] 戚承志[2] 钱七虎[1] 李信桥[2] 

机构地区：[1]解放军理工大学工程兵工程学院,南京210007 [2]北京建筑工程学院北京市工程结构与新材料工程研究中心,北京100044

出　　处：《世界地震工程》2010年第4期86-92,共7页World Earthquake Engineering

基　　金：北京市自然科学基金项目(KZ200810016007);国家自然科学基金项目(50825403);国家973重大项目(2010CB732003)

摘　　要：采用结构动力学的方法研究了浅埋地下箱形结构在竖向地震作用下的动力响应。鉴于土与结构动力相互作用分析的复杂性,为了简化分析,整个分析过程分为2步。第1步把结构看作是刚体,利用刚体与地基的相互作用分析求得刚体在竖向地震分量作用下的动力响应;第2步首先考虑到了侧墙对于顶板的抗弯约束作用,求得了顶板的固有频率及振型,并把第1步刚体的动力响应作为输入求解顶板梁的受迫振动,进而求得了顶板弯矩。Structural dynamic method is applied to study the dynamic response of a shallowly buried underground structure under vertical seismic excitation.In view of the complexity of dynamic soil-underground structure interaction analysis and in order to simplify the analysis,two steps are adopted in the analysis.In the first step,the structure is looked at as a rigid body,and the dynamic response of the structure under vertical seismic excitation is obtained on the basis of soil-structure dynamic interaction analysis.In the second step,at first the natural frequencies and mode shapes of the structure are obtained with considering the bending restraint of the side walls on roof slab,and then the dynamic response of roof slab is determined by taking the dynamic response of the rigid body in the first step as input,and furthermore the bending moment of the roof slab is obtained.

关 键 词：竖向地震分量 顶板 土与结构相互作用 动力响应 

分 类 号：P315.96[天文地球—地震学] TU43[天文地球—固体地球物理学]