摘要
本文以某实际工程的不规则划分单层网壳结构为研究对象,利用有限元程序ANSYS进行线性特征值屈曲分析,预测结构的理论屈曲强度,考察网壳的屈曲模态,屈曲路径,再按照一致缺陷模态法引入了结构的初始缺陷,在满跨荷载和半跨活荷载作用下,对结构进行非线性有限元全过程跟踪分析,得到极限荷载,初步了解不规则划分单层网壳结构失稳的一般规律。
Based on the actual project-one single layer lattice shell with irregular division,this paper has carried out eigenvalue buckling analysis with ANSYS finite element analysis program,predicted the structural theoretical buckling strength,observed buckling models and paths of single layer lattice shell,and applied initial imperfection on the structure according to consistent mode imperfection method.Finally,under full span load and half-span load,in order to get critical load,all course tracing by nonlinear element has been carried out,so we grasped preliminary the general rules of instability of the single layer lattice shell with irregular division.
出处
《建筑结构》
CSCD
北大核心
2009年第S1期101-104,共4页
Building Structure
关键词
不规则划分
特征值屈曲分析
一致缺陷模态法
全过程跟踪分析
irregular division
eigenvalue buckling analysis
consistent mode imperfection method
all course tracing analysis
