METALS AND METAL MATRIX COMPOSITES |
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Multi-point Wire Bundle Breakage Damage Detection Based on Self-magnetic Leakage Effect |
ZHANG Hong1,2, ZHANG Yujie1,2, CHENG Cheng3, TONG Kai1,2, QIU Jian1,2, ZHOU Jianting1,2,*
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1 State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing 400074, China 2 School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China 3 Chongqing Wukang Technology Co., Ltd., Chongqing 400074, China |
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Abstract The integrity of cable-staying is crucial to the service safety of cable-stayed bridges. To address the prominent wire breakage damage problem, this work used 37 wires arranged into parallel wire bundles to simulate cable-stayed specimens. Different working conditions were set up to simulate the wire breakage state, the changing characteristics of the leakage signal curves were analyzed and the characteristic index Bsd was constructed to quantitatively evaluate the wire breakage damage. The results showed that the two polar spacings of Bz curves at different wire breakage rates were well linearly and positively correlated with the wire breakage width, the change of polar spacing was insensitive to the wire breakage rate. The increments of the values of Bx and Bz at the same wire breakage width with different wire breakage rates were larger than those at the same wire breakage rate with different wire breakage widths, indicating the signal was more influenced by the wire breakage rate. The correlation between the wire breakage width, wire breakage rate and the index can be fitted better by using quadratic polynomial, and the goodness of fit of different influencing factors and the index is greater than 0.95. The slope of the fitted curves decreases gradually with the increase of the wire breakage width and the wire breakage rate. Through the analysis of the increment of the index under different factors, it is verified that the influence of the wire breakage rate on the signal is greater than that of the wire breakage width.
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Published: 10 August 2024
Online: 2024-08-29
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Fund:National Natural Science Foundation of China (52278291, U20A20314),Chongqing Natural Science Foundation(CSTB2022NSCQ-LZX0006, cstc2022ycjh-bgzxm0086, CSTB2022TIAD-KPX0205), the Research and Innovation Program for Graduate Students of Chongqing(CYS240447). |
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