区间模型结构非概率可靠性度量研究

在掌握的不确定信息较少时,可运用非概率可靠性分析方法进行结构可靠性分析.对基于区间模型的非概率可靠性分析方法进行对比分析,探讨非概率可靠性指标、非概率集合可靠度和非概率安全可能度等非概率可靠性度量之间的关系,研究非概率集合可靠度的性质和计算方法.在结构应力—强度发生干涉时,建议采用非概率集合可靠度进行可靠性分析,并给出几种常见的应力—强度组合时非概率集合可靠度的计算方法.最后通过算例验证分析结论.

STUDY OF NON-PROBABILISTIC RELIABILITY MEASURES OF STRUCTURES BASED ON INTERVAL

In the case of scarce data or insufficient information available,a non-probabilistic set model is valid alternative to structural reliability analysis.The non-probabilistic reliability measures based on interval and their interrelations are investigated.Three kinds of non-probabilistic reliability measures based on interval,which are reliability index,set based reliability measure and safety possibility degree are compared.The non-probability set-based reliability nature and the computational method have been studied.In the stress-strength interference case,the non-probability set-based of reliability analytic method is suggested to be applied to carry on the structural reliability analysis,then several common non-probability set-based of reliability computational method for stress-strength combination are also proposed.At last,the conclusion is verified by an example.