结构的模糊可靠度分析

来源期刊：中南大学学报(自然科学版)2000年第4期

论文作者：涂文戈 林丽川

文章页码：371 - 374

关键词：结构;模糊可靠度;隶属函数;预应力;空心板

Key words：structure; fuzzy reliability; membership function; pre-stress; hollow core slab

摘    要：结构的可靠度不仅与确定影响因素和不确定影响因素有关,而且与破坏准则的模糊不确定性有关.考虑到这些不确定性因素的影响,利用结构可靠性理论和模糊数学,讨论和分析了结构破坏的隶属函数的内涵,并提出了一种计算结构的模糊可靠度的公式.以预应力空心板为例进行了验证计算,分析了结构抗力变异系数、荷载效应容差以及结构抗力容差等对结构模糊可靠度的影响.实践证明,所得到的结论与实际情况相符.

Abstract: Reliability of structure is related not only to certain and uncertain influence factors, but also to fuzzy uncertain of destroy rule. Considering these uncertain influence factors, meaning of membership function of structural damage has been discussed and analyzed, fuzzy reliability index formulas of structure have been presented using theory of structural reliability and fuzzy mathematics. Checking computations have been made with pre-stress hollow core slab as an example, and the effects of variation coefficient of structural resistibility, tolerance of load effect and tolerance of structural resistibility,etc. are analysed. Several conclusions which have been obtained are in agreementwith real practice.