摘要
采用JC法 ,对影响重力坝可靠度指标 β的多个随机变量进行了敏感性分析 ,并从中探讨了最敏感因子和最不敏感因子对 β值的贡献和随机变量不同分布类型对β的影响 ,获得了一些可供工程设计借鉴的有益结论 :敏感系数小于 0 .0 5的随机变量可当作定值处理 ;敏感性较大的随机参数应被慎重对待 ,其分布参数的不同或是分布类型的改变 ,都将对可靠度指标 β产生显著影响。
In this paper, JC method is adopted to analyse the sensitivity of gravity dam reliability index β to several random variables. Moreover, the contribution of the most sensitive factor and the most insensitive factor to reliability index β and the effect of different distribution of random variables to reliability index β are explored.It's concluded that the random variable whose sensitivity coefficient is less than 0.05 may be treated as a constant, and more sensitive random variables must be dealt with carefully, because the reliability index will be changed remarkably by the distribution parameter and different distribution type.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
2001年第4期1-5,共5页
Journal of Sichuan University (Engineering Science Edition)
