建筑钢结构进展2011，Vol.13Issue(2)：8-13,6.
随机钢结构的相关性与敏感性研究
Study on Correlation and Sensitivity of Stochastic Steel Structure
摘要
Abstract
Parametric sensitivity and failure correlations are important factors for reliability design, optimization and evaluation.To verify the validity and efficiency in correlation and sensitivity analysis, a simple limit-state function is selected as an example. Subsequently, an 11-bar truss is taken as a numerical example, and main attention is given to parametric sensitivity and failure correlation of this structure. Importance measures consisting of α, γ, δ and η are investigated under deformation capacity limit state. The sensitivity of limit state equation to each random variable and of failure probability to mean and standard deviation of random variables are researched, respectively. Furthermore, correlation between failure modes is also studied. The Polak-He and SQP algorithms are introduced to compute reliability and sensitivity. The main conclusions are as follows : the influence of variance of nodal coordinates on reliability of latticed truss can not be neglected, sometimes variance of nodal coordinates plays a predominant role in reliability analysis;changing laws of the four importance parameters are approximately consistent; SQP and Polak-He, if proper scaling factor is selected, have high efficiency to search for design point.关键词
随机钢结构/可靠度/敏感性/相关性/重要性量度分类
建筑与水利引用本文复制引用
李会军,林桂枫,柳春光..随机钢结构的相关性与敏感性研究[J].建筑钢结构进展,2011,13(2):8-13,6.基金项目
国家自然科学基金项目(59908013) （59908013）
