Taking some large-span arch bridge as the research object,the paper finds out some diseases and their features on the bridge,analyzes the unfavorable influence of the current damages of the bridge according to the non-destructive test,evaluates the working status of the bridge ac-cording to the loading test,modifies the structural resistant effect,undertakes current loading capacity evaluation of the bridge,and undertakes the analysis of reasons for main diseases by combining with the test result,so as to provide some reference for bridges maintenance.%以某大跨度中承式吊杆拱桥为研究对象，基于外观检测，查出桥梁存在的病害及其特征，根据无损检测，分析了桥梁的现存缺损给其造成的不利影响，通过荷载试验，评估了桥梁的工作状态，并对结构抗力效应进行修正，同时对桥梁进行了现有承载能力评定，结合检测结果对主要病害进行病害成因分析，为桥梁维修加固提供依据。
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