钢筋砼构件抗裂失效不定性及其可靠度模糊概率分析

THE UNCERTAINTY IN FAILURE OF CRACK RESISTANCEAND ITS FUSSY POSSIBILITY ANALYSIS OF RELIABILITYIN REINFORCED CONCRETE MEMBERS

本文利用概率论和模糊数学．分析影响结构构件抗裂失效的不定性因素．将构件抗裂失效认为是一复杂模糊随机事件．并提出了相应的可靠度模糊概率分析模型．最后本文结合算例介绍了用此模型计算抗裂失效概率Ｐ或可靠指标β的具体方法和步骤，其结果满足工程设计要求．

In this paper, the uncertainty which affect the failue of crack resistance of structural members is analysed using probability theory and fuzzy sets. The failure of crack resistance is considered as a complex fuzzy and random event, and the corresponding fuzzy possibility model for reliability analysis is given. An example is presented to show the method for calculating the failure possibility of crack resistance Pf or the reliability index β, and the results are up to engineering design requirements.