通过对使用20年的桥梁进行检测,用不同的方法评定桥梁使用状况,对评级认为应更换的梁体进行单梁的破坏性试验,通过对试验数据的分析,判断梁体实际的承载力,以此来检验桥梁检测评价方法的合理性,对以后桥梁状态评价、相似桥梁现存承载力的确定、桥梁加固合理时机的确定都具有重要的借鉴意义。 Through testing the bridge using 20 years, using different methods to evaluate the condition of the bridge, destroying single beam of the beam which the grade should be replaced, and analyzing the test data to judge the actual bearing capacity of the beam, In order to verify the rationality of the bridge detection and evaluation methods, it is of great significance to evaluate the bridge status, determine the existing bearing capacity of similar bridges and determine the reasonable timing of bridge reinforcement.