In the past few decades, many bridges have been built. How to ensure the safety and durability of these bridges has become an important issue in the field of bridge engineering. Among them, the loss of the cross-sectional area of cables is a common damage and severely area loss-induced damage in bridge cables could break wires to cause bridge failures. The loss of metal area refers to corrosion inside the cable, missing wire or broken wire of the cable within a certain length of the longitudinal direction. These all make detection a very important issue for the health and maintenance of bridge cables. Magnetic flux examination can be used in analyzing the collected signals and solving many problems in the magnetic field. In this study, magnetic flux examination was used to detect the bridge cable defects based on its good performance in detecting wire rope defects. Theoretical derivation for a quantitative identification method has been finished recently. Finite element simulation and laboratory experiments were performed to evaluate the quantitative identification method and identify the uniform corrosion damage of steel wires. The characteristics of the magnetic flux detection signal of the cables in different types of defects and different equipment parameters’ influence were investigated. Furthermore, the proposed defect length coefficient was used to correct the magnetic flux signal, and it is proved that the defect length coefficient is effective in improving the accuracy of quantitative identification of short defects in the experiment.

在过去的几十年中，已经建造了许多桥梁。如何确保这些桥梁的安全性和耐久性已经成为桥梁工程领域中的重要问题。其中，电缆横截面积的损失是常见的损坏，严重的由面积损失引起的桥梁电缆损坏可能会破坏电线，导致桥梁故障。金属面积的损失是指电缆内部的腐蚀，电缆在长度方向上一定长度内的缺失或断裂。这些都使检测成为桥梁电缆的健康和维护非常重要的问题。磁通检查可用于分析收集到的信号并解决磁场中的许多问题。在这个研究中，基于磁通量检测技术在检测钢丝绳缺陷方面的良好性能，可用于检测桥梁电缆缺陷。定量鉴定方法的理论推导最近已经完成。进行了有限元模拟和实验室实验，以评估定量识别方法并识别钢丝的均匀腐蚀损伤。研究了不同缺陷类型和不同设备参数对电缆磁通量检测信号的影响。此外，提出的缺陷长度系数被用于校正磁通量信号，并证明该缺陷长度系数在提高实验中短缺陷的定量识别精度方面是有效的。定量鉴定方法的理论推导最近已经完成。进行了有限元模拟和实验室实验，以评估定量识别方法并识别钢丝的均匀腐蚀损伤。研究了不同缺陷类型和不同设备参数对电缆磁通量检测信号的影响。此外，提出的缺陷长度系数用于校正磁通量信号，并证明该缺陷长度系数在提高实验中短缺陷的定量识别精度方面是有效的。定量鉴定方法的理论推导最近已经完成。进行了有限元模拟和实验室实验，以评估定量识别方法并识别钢丝的均匀腐蚀损伤。研究了不同缺陷类型和不同设备参数对电缆磁通量检测信号的影响。此外，提出的缺陷长度系数用于校正磁通量信号，并证明该缺陷长度系数在提高实验中短缺陷的定量识别精度方面是有效的。进行了有限元模拟和实验室实验，以评估定量识别方法并识别钢丝的均匀腐蚀损伤。研究了不同缺陷类型和不同设备参数对电缆磁通量检测信号的影响。此外，提出的缺陷长度系数用于校正磁通量信号，并证明该缺陷长度系数在提高实验中短缺陷的定量识别精度方面是有效的。进行了有限元模拟和实验室实验，以评估定量识别方法并识别钢丝的均匀腐蚀损伤。研究了不同缺陷类型和不同设备参数对电缆磁通量检测信号的影响。此外，提出的缺陷长度系数被用于校正磁通量信号，并证明该缺陷长度系数在提高实验中短缺陷的定量识别精度方面是有效的。