Abstract
The employment of elastomagnetic (EM) stress sensors on large steel cables of Qiangjiang No. 4 Bridge in China is discussed. As an engineering application in the field of ferromagnetic magnetoelasticity, the EM sensors make possible non-contact stress monitoring for steel cables and pre-stressed tendons on suspension bridges, cable-stayed bridges, and other ferromagnetic structures. The correlation of the relative permeability and tensile stress is derived from the calibration. Automatic maneuvering is fulfilled by formalizing the calibration function with the temperature-influencing factor. Calibration reveals that the magnetoelastical characteristics of multi-wire hangers are analogous while that of post-tensioned tendons are similar to single wires. Insitu measurements on Qiangjiang No.4 Bridge demonstrate the reliability of the EM stress sensors.
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Wang, M.L., Wang, G., Zhao, Y. (2005). Application of EM Stress Sensors in Large Steel Cables. In: Ansari, F. (eds) Sensing Issues in Civil Structural Health Monitoring. Springer, Dordrecht. https://doi.org/10.1007/1-4020-3661-2_15
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DOI: https://doi.org/10.1007/1-4020-3661-2_15
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