一种新的既有受弯构件时变可靠度计算方法  

A New Calculating Method of Time-dependent Reliability of existing bending structure

作　　者：郑怡[1,2] 刘明[3] 高飞[2] 张延年[3] 

机构地区：[1]大连理工大学海岸和近海工程国家重点试验室,辽宁大连116024 [2]重庆交通大学(桥梁)结构工程重点实验室,重庆400074 [3]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《公路工程》2008年第5期32-35,共4页Highway Engineering

基　　金：重庆交通大学结构工程重点实验室2007开放基金资助(CQSLBF-Y07-4);国家“十一五”科技支撑计划重大项目资助(2006BAJ03A01-05);建设部科技攻关项目(2007-k3-14)

摘　　要：建立矩形截面既有受弯钢筋混凝土结构强度时变计算模型。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,研究矩形截面既有受弯钢筋混凝土结构强度时变计算模型,并给出其时变抗力计算简化公式和时变可靠度指标。结合工程实例进行计算分析,计算结果验证了本方法的正确性和科学性,与现行可靠性鉴定标准的结果相吻合,提供了连续式评级方法。时变可靠度计算方法,易于工程技术人员掌握,计算快捷、准确,为健康诊断的研究提供基础。Considered of damage of concrete and steel, and under the condition of materials being deterioration with time, it is posed that time -dependent strength calculating model about existing bending member of reinforced concrete with rectangular section. And it is given that the Simple calculating formula of time-dependent resistance and time-dependent reliability indexes. Combined with calculated example, results prove this method is correct and scientific, and the calculated result is good fit with current appraisal reliability standard. The method is easily grasped for the engineers and is very efficiency and convenience, and it makes appraisal reliability of existing structure be more science.

关 键 词：既有受弯构件 时变可靠度 抗力退化 可靠性鉴定 连续式评级 

分 类 号：TU312[建筑科学—结构工程]