建筑结构学报2011，Vol.32Issue(8)：106-112,7.
基于弯矩和轴力随机相关特性的RC偏压构件可靠度分析
Reliability analysis based on random correlative characteristics between moment and axial force for RC member subjected to eccentric compression
摘要
Abstract
The current code lacks considerations on the random correlative characteristics between moment and axial force in the reliability analysis of RC members subjected to eccentric compression.First,the function expression was derived between random correlative factors and corresponding load effect ratios.The varying rule was also obtained.Based on this analysis,the influences of different random correlation between moment and axial force on failure probability were qualitatively analyzed for the RC compressive members designed with large or small eccentricity.Then,the reliability was calculated with the Monte Carlo method for these two kinds of members under different load effect ratios when horizontal load dominated load combination.It shows that the reliability indices of the members designed with small eccentricity are stable and vary slightly under different random correlation between moment and axial force,while the reliability indices of the members designed with large eccentricity are unstable and vary greatly under different random correlation between moment and axial force.The characteristics of the load effect ratios were also discussed for the typical frame columns.It indicates that the load effect ratio of moment is several times bigger than that of axia force,resulting in low reliability indices for frame columns designed with large eccentricity.Finally,the reliability was analyzed for the columns designed with large eccentricity in practical frame structures under wind and earthquake action.The results validate that the reliability indices are low for frame columns designed with large eccentricity.关键词
RC偏压构件/可靠度/Monte/Carlo方法/随机相关/弯矩/轴力Key words
RC member subjected to eccentric compression/reliability/Monte Carlo method/random correlation/moment/axial force分类
建筑与水利引用本文复制引用
蒋友宝,杨毅,杨伟军..基于弯矩和轴力随机相关特性的RC偏压构件可靠度分析[J].建筑结构学报,2011,32(8):106-112,7.基金项目
长沙理工大学结构工程重点学科基金项目 （）
