介绍利用光纤应变传感器及加速度仪,对有着50多年桥龄的比利时蒂尔夫桥进行的环境振动测试。根据环境振动测试的结果,用随机子空间识别法确定桥梁的固有频率、阻尼比、模态位移和模态曲率;通过有限元模型修改,将所得到的模态参数用于桥梁损伤识别,并将识别结果与实际目测情况进行比较。 An introduction to the use of fiber optic strain sensors and accelerometers to test the environmental vibrations of the Tierf bridge in Belgium with more than 50 years of bridge age. According to the results of environmental vibration test, the natural frequency, damping ratio, modal displacement and modal curvature of bridge are determined by stochastic subspace identification method. The modified modal parameters are used to identify bridge damage The recognition results are compared with the actual visual situation.