缅甸帕克库公铁两用钢桁梁桥静动力试验研究

摘要

There are diffences in load tes between the rail-cum-bridgets and the other bridges,due to the different characteristics of the road load and rail load and regulatory requirements to understand the fundamental characteristics of Pakokku steel truss bridge in Myanmar and evaluate it's load-carrying capacity, field static and dynamic load tests were carried out on the bridge. The test results show that, a good agreement is achieved between the experimental and analytical results, and the inherent vibration character of bridge structure meets the railway bridge code requirements. The bridge under the planned test loads is in the elastic state,which indicates that the bridge has an adequate strength and stiffness, satisfy the designed load requirements. Test method and can be used in similar bridge structure.%由于公路荷载与铁路荷载的不同特点以及规范要求的差异,公路、铁路两用桥(以下简称公铁两用桥)的荷载试验与其他桥梁存在差异.为了解帕克库公铁两用桥的基本受力性能,对该桥实施了成桥静动力试验.试验表明,实测结果与理论分析结果一致；桥跨结构在试验荷载作用下处于弹性受力状态,具有良好的强度和刚度,满足设计荷载的使用要求及现行规范要求.试验方法及结果分析可作为其他同类桥梁的参考.