摘要
目前对于网壳结构的地震反应研究大部分仍然采用一致输入,特别是没有考虑土-结构相互作用对网壳结构的影响。本文通过对大型有限元分析软件MSC.Nastran的二次开发,用等效线性化方法考虑土体的非线性,对土体采用三维实体单元建模,并对土体在基岩面上采用地震动的多点输入,计算分析了大跨度双层柱面网壳的动力反应,并且与一致地震动输入下网壳结构的地震反应进行了对比,考察了两者之间的差异,深入分析了考虑土-结构相互作用下,双层柱面网壳结构在多点输入和一致输入下的地震反应规律,并得出了一些重要结论。
At present , the uniform seismic excitation is still assumed. In fact, multi-support excitations and soilstructure interaction should be used in dynamic response analysis of reticulated shells. In this paper, seismic responses of long-span double-layer cylindrical reticulated shell under multiple-support excitations considering soilstructure interaction are studied by secondly development of MSC. Nastran finite element software. The equivalent linearization method is used to consider soil nonlinearity. The soil model is formed by three-dimensional solid element. And the result is compared with that under uniform excitation. The rule of seismic response of reticulated shell under multiple-support excitations considering soil-structure interaction are analyzed deeply, and some important conclusions are drawn.
出处
《地震工程与工程振动》
CSCD
北大核心
2006年第3期228-231,共4页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(50278070)
关键词
土-结构相互作用
双层柱面网壳
多点输入
一致输入
soil-structure interaction
double layer cylindrical reticulated shell
multiple-support excitation
uniform excitation
