基于动态测量柔度矩阵的悬索桥吊索损伤检测

The deformation and deformation curvature obtained by measuring the flexibility matrix are effective means to detect the damaged cables of suspension bridges. A simulation method, named as dynamically measured flexibility method, was proposed to locate damages in 8 scenarios at different locations of cables with different damage intensities and noises. The result shows the presented method is able to locate the single/multiple damages with severity of 95% and with the noise level of 5%. Then, laboratory mock-up tests were carried out to verify the effectiveness of the flexibility metrices for detecting and locating damages. The experimental results show that deformation curvature is more effective for detecting and locating damages than flexibility-based displacement patterns. In addition, modal truncation is to be minimized since measured flexibility has to approximate actual flexibility.