基于光纤光栅振动传感器的桥梁索力实时监测

Real-Time Monitor System of Bridge-Cable Force Based on FBG Vibration Sensor and Its Application

将研制成功的光纤光栅振动传感器以及桥梁索力实时监测系统应用于武汉长江二桥进行索力长期远程实时监测.光纤光栅振动传感器输出的信号可在光纤中进行远程传输,能在任何气候条件下长期稳定工作,适合于桥梁拉索索力的长期远程实时监测;开发的桥梁索力实时监测系统软件,具有拉索特征频率自动识别能力,可以实时进行索力计算.通过对武汉长江二桥拉索索力的实时监测,得到了桥梁索力的分布及其运行状况,为桥梁安全评估提供了可靠的依据.该系统可推广应用于其他大型斜拉索桥.

A long-term real-time monitoring system of cable force based on FBG vibration sensor developed by ourselves has already been adopted on the Second Yangtze River Bridge of Wuhan.This monitoring system as well as the vibration sensor,are especially suitable for remote monitoring the cable force of bridges timelessly since they have long-term stability while working in extremely adverse circumstance.This software of the system has the ability to automatically recognize characteristic frequency of the cables,and calculate the force directly.By adopting this monitoring system,we have learn the operation status of the Second Yangtz River Bridge of Wuhan and conclude the distribution characteristics of the cable force along the whole bridge,consequently make assessment about the health and security of the bridge.