东水门长江大桥动力特性监测系统研究

Research on Dynamic Characteristics Monitoring System of Dongshuimen Yangtze River Bridge

重庆东水门长江大桥为公轨两用单索面斜拉桥桥,轻轨、车辆和桥耦合振动的机理十分复杂。文章以重庆东水门长江大桥为研究对象,提出了一种基于自然激励(自然风,自然行车)的动力特性监测系统,并通过对系统采集的数据进行模态分析和自频谱分析,得出该动力特性监测系统在自然激励下测得的数据真实、稳定、可靠,具有广泛的适用性与较大的经济效益。

Chongqing Dongshuimen Yangtze River Bridge is the cable-stayed bridge with single cable plane and used both for highway and railway,the coupled vibration mechanism of light rail,vehicles and bridge is very complex. Taking Chongqing Dongshuimen Yangtze River Bridge as the research object,this article presented a dynamic characteristics monitoring system based on natural excitation（ natural wind,natural traffic）,and through the modal analysis and self-spectrum analysis on the data collected by this system,it obtained that the data measured by this dynamic characteristics monitoring system under the natural excitation is true,stable,and reliable,thereby it has broad applicability and greater econom-ic benefits.