竖向承载桩的模糊随机可靠度计算方法  

Calculation method for fuzzy random reliability of vertical bearing piles

作　　者：李镜培[1] 舒翔[1] 

机构地区：[1]同济大学地下系,上海200092

出　　处：《岩土力学》2002年第6期754-756,共3页Rock and Soil Mechanics

摘　　要：根据桩顶沉降率l来描述桩基的承载过程,并将沉降率l视作模糊随机变量,同时,考虑了桩基失效具有的模糊性和随机性。通过模糊统计法,确定了l对失效的隶属函数)(lmA,再用概率统计方法求得了l的分布参数。导出了桩基承载可靠度和可靠性指标的计算方法。通过实例计算,证明该方法对分析桩基承载可靠性既合理又实用。The settlenment rate lof piletop is used to describe the bearing process of piles and the settlenment rate lis taken as a fuzzy random variable considering the fuzziness and randomness of the failure of piles. The membership function ()lmA of l in the failure state is determined with fuzzy statistics method and the distribution parameter of l is obtained with the probability statistics method. The calculation method for the reliability and the reliability index of pile foundation is derived and it is demonstrated through examples to be theoretically innovative and practically useful in the reliability analysis of the load bearing of pile foundation.

关 键 词：桩 模糊 可靠性 桩顶沉降率 

分 类 号：TU473.1[建筑科学—结构工程]