摘要
根据在役桥梁的作用效应区间特点,引入凸集模型非概率可靠性理论方法,在非概率可靠性指标常用的3种求解方法(即定义法、转化法和优化法)的基础上,对基于区间变量的在役桥梁非概率可靠性评估进行了研究.考虑检测手段的局限性,存在难以获取在役桥梁概率模型中的全部统计参数的问题,给出了在役桥梁非概率可靠性评估方法的一般步骤,并对一座实桥分别进行了概率和非概率的可靠性评估,同时进行了时变可靠性分析和寿命预测.研究结果表明,在原始数据不充分情况下,对在役桥梁进行非概率可靠性评估是可行的和合理的.
According to the interval characteristics of action effects presented in bridges on service, the non-probabilistic reliability theory based on convex model and its application in bridge engineering were highlighted. Three calculating schemes of non-probabilistic reliability, including definitional procedure, transformational one and optimal one, are presented. The general steps of non-probabilistic reliability assessment of bridges on service were discussed. Then the application was carried out in a real bridge. Furthermore, the time-varying reliability analysis and life forecast of bridges in active service were performed. The results show that non-probabilistic reliability assessment of bridges on service is feasible and reasonable when available data are limited.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第12期120-123,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(10972984)
关键词
桥梁
可靠性分析
评估
凸集模型
非概率可靠性
区间变量
bridge
reliability analysis
assessment
convex model
non-probabilistic reliability
interval variable
