隧道复合衬砌运营期可靠性评价方法  

RELIABILITY ANALYSIS OF TUNNEL SECONDARY LININGS DURING SERVICE LIFE

作　　者：谢楠[1] 王大力[1] 张弥[1] 朱尔玉[1] 王勇[1] 

机构地区：[1]北京交通大学土建学院,北京100044

出　　处：《工程力学》2007年第z1期119-122,共4页Engineering Mechanics

基　　金：北京交通大学科学研究基金资助项目(2003SM024);北京市自然科学基金资助项目(8032011)

摘　　要：一些隧道的二次衬砌作为重要的结构参与工作,承担荷载。提出了复合衬砌运营期可靠性评价方法,采用不等宽的脉冲随机过程描述钢筋混凝土衬砌的劣化,用施工资料和监测数据+基于连续介质模型的有限元计算+响应面法获得荷载效应的显式,给出了严格意义的可靠性计算公式,并给出算例。For some tunnels,secondary linings are used to carry loads. In this paper,a method is presented to assess the reliability of composite linings during the service life of tunnels. A pulse process is proposed to describe the degradation of reinforced concrete linings. Based on construction records,in-situ monitoring data and finite element analyses,Response Surface Method is adopted to obtain the explicit expressions of load effects. A strict formulation for reliability analysis is given. Finally,the proposed method is demonstrated with an example.

关 键 词：隧道及地下工程 可靠性分析 响应面法 结构劣化 复合衬砌 随机过程 

分 类 号：TU311.2[建筑科学—结构工程]