摘要
基于刚性地基假定的双层柱面网壳结构抗震计算方法未充分考虑场地土对其地震反应的影响。为验证土-结构相互作用对双层柱面网壳结构三维地震反应的影响,本文以一个48m跨度的双层柱壳为研究对象,分别建立基于刚性地基假定的柱壳结构及其考虑土-结构相互作用的三维有限元整体模型,研究对比了这两种结构体系的动力特性,并用时程分析法对其进行了三维地震反应分析与对比。结果表明,考虑土-结构相互作用后,双层柱面网壳结构的自振周期延长,振型发生变化;结构位移增大,部分杆件轴力增大。因此,对双层柱面网壳结构的抗震分析应考虑土-结构相互作用的影响。
Based on the assumption of rigid foundation for seismic response of double-layer cylindrical latticed shell, the calculation methods have not considered the influence of site soil sufficiently. In order to verify the 3D seismic response of double-layer cylindrical latticed shell considering soil-structure interaction, 3D finite element models of a double-layer cylindrical latticed shell structure with 48m span and its integrated soil-structure interaction system are established respectively. The contrastive analysis of dynamical characteristics and 3D seismic response with nonlinear time history analysis are made for the two structure systems. For double-layer cylindrical latticed shell structure, the results show that the natural vibration period increases, the vibration mode changes, the displacement increases, and the internal force of part of members increases when soil-structure interaction effect is considered. Therefore, it is suggested that soil-structure interaction influence should be considered for double-layer cylindrical latticed shell structure.
出处
《工程抗震与加固改造》
北大核心
2013年第2期29-34,共6页
Earthquake Resistant Engineering and Retrofitting
基金
秦皇岛市科学技术研究与发展计划(201001A028)
关键词
双层柱面网壳
土-结构相互作用
动力特性
地震反应
时程分析
double-layer cylindrical latticed shell
soil-structure interaction
dynamical characteristic
seismic response
time historyanalysis
