网壳结构弹塑性大位移全过程分析  

GEOMETRIC AND MATERIAL NON-LINEAR ANALYSIS OF LATTICED SHELL

作　　者：王娜[1] 陈昕[1] 沈世钊[1] 

机构地区：[1]哈尔滨建筑工程学院

出　　处：《土木工程学报》1993年第2期19-28,共10页China Civil Engineering Journal

基　　金：国家自然科学基金

摘　　要：单层网壳结构的稳定性不仅与结构的几何非线性有关,而且与结构的物理非线性也有很大关系。本文根据Von Misses屈服准则及Prandtl-Reuss增量关系,推导出理想弹塑性材料薄壁钢管杆件单元的增量本构关系,并用有限分割有限元法编制了计算程序。首先用此程序对近年来国外发表的一些实验和计算结果进行了验证;其次对双杆体系的弹塑性大位移全过程做了详细的描述;最后对一个具有285个单元636个自由度的单层短程线穹顶网壳做了弹塑性大位移全过程分析。结果表明,所采用的理论及计算方法是正确、可靠的;在考虑结构的几何非线性基础上,进一步考虑结构的物理非线性影响能够更全面地反映结构的非线性性能,从而为工程结构设计提供了可靠的理论分析。The incremental stress-strain relationship is presented for thin-walled circular steel tube element which is considered as an elastie-perfectly-plastic material. By means of finite segment finite element method, a non-linear analysis program with consideration of both geometric and material non-linearities has been compiled for the reticulated space structures. Some numerical examples with experimental results taken from recent publications have been analyzed and compared by the progrom. The complete process of the elastic-plastic large displacement of a geodesic dome has been also thoroughly studied and compared with the results of a elastic large-displacement analysis.

关 键 词：网壳结构 弹塑性分析 位移 

分 类 号：TU330.1[建筑科学—结构工程]