基于荷载试验的既有大跨径桁架拱桥加固后承载能力评定

Evaluation of Reinforced Bearing Capacity of Existing Long-Span Truss Arch Bridges Based on Load Tests

以甘肃省境内某维修加固后的1-70 m大跨度桁架拱桥为例,分别进行了静载、动载试验,并根据试验结果研究了桥梁在静载作用下的内力、变形性能和动力特性。研究结果可为该大跨径桁架拱桥的运营加固维修提供重要的技术依据。

The paper takes a repaired and reinforced 1-70 m long span truss arch bridge in Gansu Province as an example to conduct static and dy-namic load tests.Based on the test results,the internal force,deformation performance,and dynamic characteristics of the bridge under static load were studied.The research results can provide important technical basis for the operation,reinforcement and maintenance of the large-span truss arch bridge.