高墩大跨连续梁铁路桥动力试验

为检验桥跨结构的实际动力性能，对主跨100m，墩高99m的松头江连续梁铁路桥进行了全桥动力试验，测试其自振特性以及列车以不同速度通过桥跨和在桥上制动时桥跨结构的动力响应，将实测结果与车桥耦合振动分析结果进行了比较，二者基本相符．结果表明，该桥具有良好的竖向刚度、横向刚度和结构强度；列车在桥上运行时对桥跨结构有一定的冲击作用，而列车行车具有良好的安全性与舒适度。

Dynamic Loading Test of Railway Long-Span Continuous Beam Bridge with High Piers

In order to inspect the actual dynamic responses of a bridge structure, dynamic loading tests were carried out on the Songtoujiang bridge, a railway continuous beam bridge with a main span of 100 m and a pier of 99 m in high. The natural vibration and dynamic responses of this bridge structure were tested respectively under the conditions that a train passes by and brakes on the bridge at different velocities. In addition, the testing results were compared with the results of vehicle-bridge coupling vibration analyses to show their sameness. The research results show that the bridge has enough vertical stiffness, transverse stiffness and strength, and the safety and comfortability are good though the passing train has an impact to the bridge structure.