检测桥梁动力特性的车辆随机激励法

On Vehicles Random Excitation Method to Detect the Bridge Dynamic Characteristics

提出了一种利用车辆振动作为振源的"车辆随机激励法",用来检测桥梁的动力特性。从理论上证明了该方法的可行性,并在天津永和桥上做了检验,证实了该方法的实践可行性。该方法可以在不中断交通的情况下对大型桥梁结构的振动模态进行测试,对于运营桥梁的破损诊断和耐久性评估具有重要意义。

A vehicles random excitation methodwas applied to detect the bridges dynamic charac-teristics, and the method was at the base ofvibration source from vehicle vibration.It wasproved feasible from the theory;meanwhile, itshowed its practical feasibility through the detectionon Yonghe bridge in Tianjin.The method could makea test on the dynamic modal of large type bridgesunder the normal traffic situation, which was ofimportant meaning for damage diagnosis anddurability assessment of operating bridges.