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Proceedings Paper

Detection and characterization of corrosion of bridge cables by time domain reflectometry
Author(s): Wei Liu; Robert G. Hunsperger; Kevin Folliard; Michael J. Chajes; Jignesh Barot; Darshan Jhaveri; Eric Kunz
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Paper Abstract

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.

Paper Details

Date Published: 1 February 1999
PDF: 12 pages
Proc. SPIE 3587, Nondestructive Evaluation of Bridges and Highways III, (1 February 1999); doi: 10.1117/12.339928
Show Author Affiliations
Wei Liu, Univ. of Delaware (United States)
Robert G. Hunsperger, Univ. of Delaware (United States)
Kevin Folliard, Univ. of Delaware (United States)
Michael J. Chajes, Univ. of Delaware (United States)
Jignesh Barot, Univ. of Delaware (United States)
Darshan Jhaveri, Univ. of Delaware (United States)
Eric Kunz, VETEK Systems Corp. (United States)

Published in SPIE Proceedings Vol. 3587:
Nondestructive Evaluation of Bridges and Highways III
Steven B. Chase, Editor(s)

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