摘要
有计划地对480余例实际尺寸的短程线型单层球面网壳进行了双重非线性全过程分析,求得了极限承载力,系统地考察了初始缺陷和荷载不对称分布等因素对网壳稳定性能的影响,并重点讨论了材料非线性对极限承载力的影响。通过大规模参数分析研究,较全面了解了短程线型单层球面网壳弹塑性稳定性能;在短程线型网壳弹性极限承载力公式基础上,利用塑性折减系数对其进行修正,提出了短程线型单层球面网壳弹塑性极限稳定承载力的实用计算公式。
A comprehensive parametric analysis of stability behaviours of geodesic latticed domes with various geometric parameters （span, member cross-section, etc. ） has been carded out based upon accurate nonlinear complete-process analysis. More than 480 examples of real latticed domes with initial imperfections and possible unsymmetrical action of loads are studied systematically, and the plentiful results obtained are thoroughly studied. As a result, practical formulas for predicting critical loads of real latticed dome structure, which are very simple for application but based on ＂accurate＂ theory, are revised.
出处
《建筑结构》
CSCD
北大核心
2006年第12期88-91,共4页
Building Structure
关键词
短程线
稳定
极限承载力
弹塑性
geodesic latticed domes
stability
critical loads
elastic-plastic
