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本文主要研究工作是通过无损检测的结果对在役桥梁进行可靠度评估。而回弹法是目前检测桥梁混凝土强度的常用方法。通过贝叶斯方法对混凝土强度的分布模型进行修正得到新的分布模型。然后用修正后的分布模型对桥梁进行安全性评估。最后将计算得到的可靠性指标同目标可靠度指标进行对比从而判断该桥的实时服役情况。文章最后通过一个现场实例对该方法进行验证。
The main research work of this paper is to evaluate the reliability of the bridge in service through the result of nondestructive testing. The rebound method is currently used to detect the strength of concrete bridges. The distribution model of concrete strength is modified by Bayesian method to obtain a new distribution model. The bridge is then evaluated for safety using the revised distribution model. Finally, the calculated reliability index is compared with the target reliability index to judge the real-time service status of the bridge. Finally, the article verifies the method through a field example.