桩的模糊随机可靠性分析  

Fuzzy stochastic reliability analysis of pile foundation

作　　者：吕玺琳[1] 吕龙[2] 吕恩琳[3] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]西南交通大学峨嵋校区土木工程系,四川峨嵋山614202 [3]重庆大学工程力学系,重庆400030

出　　处：《岩土力学》2008年第7期1993-1996,共4页Rock and Soil Mechanics

摘　　要：利用一次二阶矩法,考虑可靠性分析模型中随机参数的模糊性,建立了模糊随机可靠性分析模型。利用分解定理,取一系列λ截集,将模糊数转换为一系列区间数进行运算,得到了一种模糊随机可靠度的计算方法。将该法应用到桩的可靠性分析中,实例表明,该方法是合理实用的。Considering the fuzzy uncertainties of the parameters of stochastic variables, a fuzzy stochastic reliability analysis model is derived based on first-order second-moment method （FOSM）. By introducing λ cut set, fuzzy numbers are converted into a series of interval numbers; by use of which, fuzzy stochastic reliability is calculated. The proposed method is employed to the reliability analysis of pile foundation. Case study shows that this method is theoretically innovative and practically useful.

关 键 词：一次二阶矩法 模糊随机可靠度 λ截集 区间数 桩 

分 类 号：O242.1[理学—计算数学]