既有双筋矩形截面受弯构件时变可靠性分析  

Time-Dependent Reliability Analysis on Existing Concrete Bending Structure with Double Reinforced Rectangular Section

作　　者：沈小俊[1] 高飞[1] 郑怡[2] 

机构地区：[1]重庆市公路工程质量检测中心,重庆400060 [2]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《重庆交通大学学报（自然科学版）》2009年第3期484-486,496,共4页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：在同时考虑混凝土损伤和钢筋损伤及材料强度随时间劣化的情况下,结合规范中的设计计算公式,研究既有双筋矩形截面受弯构件抗力时变计算模型,并给出其时变抗力计算简化公式和时变可靠度指标。结合工程实例进行了计算分析,计算结果验证了本方法与现行可靠性鉴定标准的结果相吻合。Considering the damage of concrete and steel as well as the condition that materials are deteriorated with time at the same time, the time-dependent computation model of existing bending structure with double reinforced rectangular section is studied according to the design and computing formulas in the code. The simplified calculation formula of time-dependent resistance and time-dependent reliability indexes are also given. This method is applied to an actual engineering project, and the calculation results prove that it is fit with the results of current reliability evaluation standard.

关 键 词：既有受弯构件 双筋矩形截面 时变可靠度 抗力劣化 

分 类 号：TU312[建筑科学—结构工程]