Cable damage detection of a suspension bridge in terms of dynamically measured flexibility matrix
MENG Fanhao1,2,3, YU Jingjun2, MA Wenshuo2
1.China Electric Power Research Institute,Beijing 100055, China;
2.Robotics Institute, Beihang University, Beijing 100191, China;
3.Active Structures Laboratory, Université Libre de Bruxelles, Brussels 1050, Belgium
Abstract: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.
孟凡豪1,2,3,于靖军2,马文硕2. 基于动态测量柔度矩阵的悬索桥吊索损伤检测[J]. 振动与冲击, 2019, 38(14): 267-275.
MENG Fanhao1,2,3, YU Jingjun2, MA Wenshuo2. Cable damage detection of a suspension bridge in terms of dynamically measured flexibility matrix. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(14): 267-275.
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