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1 February 1999 Detection and characterization of corrosion of bridge cables by time domain reflectometry
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In this paper, we develop and demonstrate a nondestructive evaluation technique for corrosion detection of embedded or encased steel cables. This technique utilizes time domain reflectometry (TDR), which has been traditionally used to detect electrical discontinuities in transmission lines. By applying a sensor wire along with the bridge cable, we can model the cable as an asymmetric, twin-conductor transmission line. Physical defects of the bridge cable will change the electromagnetic properties of the line and can be detected by TDR. Furthermore, different types of defects can be modeled analytically, and identified using TDR. TDR measurement results from several fabricated bridge cable sections with built-in defects are reported.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wei Liu, Robert G. Hunsperger, Kevin Folliard, Michael J. Chajes, Jignesh Barot, Darshan Jhaveri, and Eric Kunz "Detection and characterization of corrosion of bridge cables by time domain reflectometry", Proc. SPIE 3587, Nondestructive Evaluation of Bridges and Highways III, (1 February 1999);

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