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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.
Based on the characteristics of the service effect interval in service bridges, the non-probabilistic reliability theory of convex set model is introduced. Based on the three commonly used methods of non-probabilistic reliability index (definition, transformation and optimization) Interval variables in non-probabilistic reliability assessment of bridges is studied.Considering the limitations of detection methods, it is difficult to obtain all the statistical parameters of the existing bridge probabilistic model of the problem, given the non-probabilistic reliability of existing bridge assessment method , A reliability evaluation of probability and non-probability for a real bridge was carried out, and time-varying reliability analysis and life prediction were carried out at the same time.The results show that in the case of inadequate raw data, Non-probabilistic reliability assessment is feasible and reasonable.