Nondestructive Evaluation of Bridge Cables and Strands Using the Magnetic Main Flux Method (MMFM)

Inspection of structurally critical cable and strand components of bridges is important for integrity assurance. In recent years, various technologies have been proposed for inspecting cables and strands for corrosion damage. The authors have developed a nondestructive evaluation (NDE) approach, termed the magnetic main flux method (MMFM), that advances this technology compared to existing technologies. The purpose of the present paper is to explain MMFM and report results of tests and demonstrations that have been performed.

References
1. Moriya, Takahashi, Tsukada, and Hanasaki. “Result of magnetic evaluation for wire ropes used real structures,” Proceeding of MMIJ Fall Conference, B5-1. 2004. 2. Weischdel, H.R. “The inspection of wire ropes in service, A critical review,” Material Evaluation, Vol. 43, No. 13, pp. 1592-1605. 1985. 3. Moriya, Sugahara, Tsukada, Ogawa Maeda and Akashi. “Non-destructive Evaluation of Corrosion Along The Length of Structural Cables,” Proceeding of MMIJ Fall Conference, B8-1. 2002. 4. Moriya, Sugahara, Tsukada, Ogawa Maeda and Akashi. “Non-destructive Evaluation of Corrosion Using Two Kinds of Magnetic Methods for Structural Cables,” Proceeding of MMIJ Fall Conference, B1-1. 2003. 5. Sakai, Kikuchi. “Corrosion Protection of Honshu-Shikoku Bridges,” HONSHI TECHNICAL REPORT Vol. 32 No. 110 pp. 35-42. 2008.
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