本文对既有混凝土梁桥残余承载性能进行评估的主要方法进行了分析,阐述了基于外观检查、荷载试验、可靠性理论以及足尺试验的评估方法的适用条件和范围。以早期典型预应力混凝土小箱梁桥为例,分析不同评估方法结果的准确性和适用性,为混凝土梁桥残余承载性能的评估提供参考。 In this paper, the main methods of evaluating the residual bearing capacity of existing concrete girder bridges are analyzed. The applicable conditions and scope of evaluation methods based on appearance inspection, load test, reliability theory and full-scale test are described. Taking the early typical prestressed concrete box girder bridge as an example, the accuracy and applicability of the results of different evaluation methods are analyzed, which can provide reference for the assessment of residual bearing capacity of concrete girder bridge.