通过某大跨榆架拱桥试验荷载下的拱顶挠度和应变计算值与实测结果的对比分析，指出该桥已处在不安全的工作状况之下，有待维修加固，以提高其正常的承载能力。计算中用力法原理求解二铰析架拱，并按弹性支承连续梁法计算荷载的横向分布。 Through the comparative analysis of calculated and measured values ​​of the dome deflection and strain under the test load of a large-span Yuliu arch bridge, it is pointed out that the bridge has been under unsafe working conditions and needs to be repaired and reinforced so as to enhance its normal bearing capacity . In the calculation, the method of force method was used to solve the two-hinge truss arch, and the transverse distribution of loads was calculated according to the elastic support continuous beam method.