块状岩体稳定性模糊能度可靠性分析方法  

Fuzzy possibilistic reliability analysis method for block rock mass stability

作　　者：李继明[1] 张永杰[2] 

机构地区：[1]义乌工商职业技术学院,浙江义乌322000 [2]长沙理工大学土木与建筑学院,长沙410004

出　　处：《兰州大学学报（自然科学版）》2011年第3期18-23,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：湖南省交通科技项目(200904);长沙理工大学人才基金项目

摘　　要：针对岩体工程中的不稳定块体,探讨可动块体沿单结构面滑动与沿双结构面滑动的稳定性分析方法.在此基础上,根据块状岩体稳定性分析力学参数取值所具有的随机性、模糊性与区间性等不确定性,采用三角模糊数表示块状岩体结构面抗剪强度参数取值,进而建立块状岩体可靠性分析之功能函数.利用模糊能度可靠性分析方法对其进行分析,并在探讨可靠性指标求解方法基础上建立了块状岩体稳定性模糊能度可靠性分析方法.通过工程实例分析与计算结果表明本文模型与方法的合理性与可行性.The stability analysis method for the unstable block rock mass sliding along with the single structure surface or the double structure surface was discussed. And there were randomness, fuzziness and interval feature with the mechanical parameters of block rock mass. So the triangular fuzzy numbers were used to express shear strength parameters of the rock mass structure surface. Then the functions for the reliability analysis were established, The fuzzy possibilistic reliability analysis method was used to analyse the function and ~he fuzzy possibilistic reliability analysis method for block rock mass stability was proposed based on the study of the reliability index solving method. The computation and analysis of the practical engineering demonstrated the rationality and feasibility of the model and the method in this paper.

关 键 词：块状岩体 稳定性 模糊能度 可靠性 三角模糊数 

分 类 号：TU457[建筑科学—岩土工程]