作　　者： ;

机构地区： 西南交通大学

出　　处： 《桥梁建设》 1998年第2期7-9,15,共4页

摘　　要： 在对影响钢筋混凝土梁可靠性各种因素的变异性分析的基础上，采用一次二阶矩的验算点法对一座既有铁路混凝土梁在单元时段内的失效概率进行了估计，并根据剩余使用期内的失效概率与单元时段内失效概率的简单比例关系，对该梁剩余使用期内的失效概率进行估计。作为对问题的探讨，亦分析了影响既有混凝土梁可靠性的因素。 Based on the variability analysis of the different factors affecting the reliability of the reinforcement concrete,using design point reliability analysis method of one order two moments method,the failure probability in unit time of a existing railway concrete beam is evaluated.Furthermore,according to the simple relationship of the failure probability between in remaining lifespan and in unit time,the failure probability in remaining lifespan of the beam is calculated.In order to discuss this problem further,the factors affecting the reliability of the existing concrete beam are also analyzed in this paper.

关 键 词： 铁路桥 混凝土梁 承载力 可靠度 评估

领　　域： [建筑科学] [交通运输工程]