预应力局部单双层浅网壳结构的几何非线性稳定分析  

Geometrically nonlinear stability analysis of prestressed partial single layer shallow reticulated shells

作　　者：肖建春[1] 马克俭[1] 

机构地区：[1]贵州工业大学空间结构研究所,贵州贵阳550003

出　　处：《空间结构》2003年第2期32-37,31,共7页Spatial Structures

基　　金：贵州工业大学科研基金项目(02004).

摘　　要：应用几何非线性有限元法,对不同形式的预应力局部单双层浅网壳结构在受全跨表面荷载作用时的整体稳定性进行分析.分析考虑了非对称分布荷载作用的情况.计算表明,结构在全跨表面荷载作用时,对称加载所对应的临界荷载不一定是结构的最小临界荷载.在采用相同橡胶垫支座的情况下,预应力可以略微提高结构的临界荷载,但结构的临界荷载仍小于固定铰接支承的非预应力浅网壳结构.With the method of geometrically nonlinear FEM, the overall stability properties of various kinds of prestessed partial single layer shallow reticulated shells under distributed loads are investigated. The asymmetric distributed loads are also considered. Calculated results show that the symmetric distributed critical load may not be the minimum distributed critical load. Compared with the structure that adopts the same elastomeric bearings, prestressing slightly increases the critical load. The critical load of prestressed structure is lower than that of the corresponding one with fixed pinjoint type bearings.

关 键 词：预应力 网壳结构 几何非线性 非对称 临界荷载 稳定性 

分 类 号：TU378[建筑科学—结构工程]