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
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.
通讯作者:
* 周建庭,重庆交通大学教授、博士研究生导师。1993年重庆交通大学公路工程专业本科毕业,1996年重庆交通大学桥梁工程专业硕士毕业,2005年重庆大学光电工程学院仪器科学与技术专业博士毕业。目前主要从事大跨拱桥结构行为与性能控制、桥梁检测、评估与加固研究。发表学术论文400余篇,包括Corrosion Science、Engineering Structures、Measurement、Nondestructive Testing and Evaluation、Journal of Magnetism and Magnetic Materials、《中国公路学报》《土木工程学报》等。jtzhou@cqjtu.edu.cn
作者简介: 张洪,重庆交通大学教授、博士研究生导师。2009年重庆交通大学通信工程专业本科毕业,2012年重庆交通大学计算机应用技术专业硕士毕业,2017年重庆交通大学桥梁与隧道工程专业博士毕业后留校工作至今。目前主要从事桥梁健康监测及无损检测研究。发表论文50余篇,包括Corrosion Science、Engineering Structures、Journal of Magnetism and Magnetic Materials、Measurement、Nondestructive Testing and Evaluation、《材料导报》《土木工程学报》《仪器仪表学报》等。
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2024, Vol. 38 
