柔性桩复合地基承载力可靠度分析  

Reliability Analysis of Bearing Capacity on Composite Foundation with Flexible Pile

作　　者：牛晨亮[1] 丁继辉[2] 莫仁冬[1] 

机构地区：[1]北京城建设计研究总院有限责任公司,北京100037 [2]河北大学,河北保定071002

出　　处：《施工技术》2009年第S2期381-383,共3页Construction Technology

摘　　要：地基承载力可靠度研究是采用概率极限状态方法编制地基基础工程规范的基础性工作之一。本文以柔性桩复合地基为例建立了复合地基承载力可靠度概率分析模型,模型中考虑了基础深度和基础形状的影响。采用JC法进行可靠度指标分析。在Windows环境下用Visual Basic 6.0编制了复合地基承载力可靠度分析程序;最后结合工程实例分析了置换率、桩土应力比、随机变量的变异性对可靠度指标的影响。Reliability research of foundation bearing capacity is one of basic works for standard of foundation engineering.Probability model of bearing capacity of composite foundation with flexible pile is built considering effects of depth and shape of the foundation.JC method is used to analyze reliability index,which means that program using Visual Basic 6.0 in Windows to calculate reliability index of foundation.Through engineering examples,the effects of replacement ratio,stress ratio between soil and pile,variety coefficient of stochastic variables on reliability index are analyzed.

关 键 词：复合地基 柔性桩 承载力 JC法 可靠度分析 

分 类 号：TU473.1[建筑科学—结构工程]