重力式挡土墙结构体系可靠度的Monte Carlo模拟  

Monte Carlo Simulation of System Reliability of Gravity Retaining Wall

作　　者：杜永峰[1,2] 余钰[2] 

机构地区：[1]西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [2]兰州理工大学防震减灾研究所,甘肃兰州730050

出　　处：《西北地震学报》2012年第1期29-32,共4页Northwestern Seismological Journal

基　　金：国家自然科学基金(50978130);甘肃省建设科技攻关(JK2008-9)

摘　　要：建立了重力式挡土墙倾覆、基底滑移、地基承载力、墙体自身强度等几个失效模式的可靠度分析模型,采用逐步等效平面法计算结构体系的可靠度。假定设计参数为正态分布的随机变量,利用MATLAB软件的库函数normrnd实现随机样本的抽取。选择重力式挡土墙的实际算例对挡土墙改建后的几个失效模式及结构体系的可靠度进行分析,并与作者所做的其它理论分析结果进行了对比。数值模拟表明两种方法的结果能较好相符。A model is formulated for calculating the reliability of gravity retaining wall corresponding to such failure mode as overturning,base sliding,insufficient bearing capacity of foundation and tensile strength of the wall,and a gradual equivalent method is employed to calculate the reliability of the structural system.The design parameters are assumed to be random variables with normal distribution,the random sample is extracted by using MATLAB library function normrnd.The reliability of several monadic failure modes and the reliability of the structural system are calculated by selecting a real retrofitted gravity retaining wall as numerical example and the result is compared with the theoretical analysis results made by author.The result shows that the reliability calculated from the two methods are consistent.

关 键 词：重力式挡土墙 结构体系可靠度 失效概率 蒙特卡罗方法 

分 类 号：TU443[建筑科学—岩土工程]