摘要
探讨了复合支护的极限状态 ,并提出了后期支护在某一截面上的内力超过其承载能力时结构即失效的模式 ;采用了定值有限元与函数连分式渐进法相结合的方法计算可靠度 ,并在计算中同时考虑了随机变量的相关性和不同的概率分布。鉴于支护时机对复合支护的受力状态有较大的影响 。
In this paper, the ultimate limit states of composite tunnel linings are discussed. The point of view that the failure of the second lining would lead to structural failure is proposed. The numerical simulation, continued fraction approximation and JC method are employed for the reliability calculation of composite tunnel linings. During the calculation of reliability, the deterministic structural analysis and FEM can be used directly. The correlation between the random variables and their different probability distribution are also considered. The moment of supporting as a random variable during the calculation of reliability is proposed due to its effect on stressed state of composite tunnel linings.
出处
《地下空间》
CSCD
2003年第1期45-47,共3页
Underground Space
基金
上海市重点学科建设项目资助
关键词
复合支护
承载力
极限状态
可靠度
隧道
composite tunnel lining
ultimate limit state
reliability
