摘要
通过大型有限元分析软件ANSYS对40m跨单层椭球形网壳结构进行研究和参数分析。模型中的下部结构采用钢筋混凝土柱,以考虑对网壳的影响,并对单层椭球形网壳是否考虑下部结构的两种计算模型进行了自振振型下的模态比较。文中提出此类网壳屈曲约束支撑的布置方式,等截面替换了网壳内的部分杆件,并对有屈曲约束支撑单层椭球形网壳的减震性能进行分析。结果表明,下部结构对结构整体的影响不可忽略,合理布置约束屈曲支撑的网壳结构减震效果较好。
The finite element analysis software ANSYS program is applied to analyze the 40m span single-layer oval shell and its parameters in this paper. In the model the the reinforced concrete column is selected as the sub-structure, so as to consider its effect on the shell. The modes under natural vibration model are comparatively analyzed whether the single-layer oval shell is with the sub-structure or not. A kind of BRB arrangement mode is presented by which some sections of the shell with the same area as BRBs are replaced, and the vibration reducing performance of the single-layer oval shell with BRBs is studied. The results show that the effect of the Sub-structure can not be ignored and the vibration reducing effect of the shell structure is doing well by rational arrangement of the BRBs.
出处
《建筑科学》
北大核心
2008年第11期36-39,共4页
Building Science
基金
国家自然科学基金项目(50678078)
关键词
单层椭球形网壳
屈曲约束支撑
下部结构
减震
the single-layer oval shell
buckling restrained brace （BRB）
sub-structure
vibration reducing
