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Proceedings Paper

Crack damage detection of concrete structures using distributed electrical time domain reflectometry (ETDR) sensors
Author(s): Mark W. Lin; Ayo O. Abatan; Wei-Min Zhang
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Paper Abstract

Electrical time domain reflectometry (ETDR) stress/strain sensing technique has been successfully used in geotechnical applications to detect rock deformation and longwall movement. Since durable sensor media that can survive harsh construction environment and has long service life can be used, the ETDR sensing method appears to be a practical technique for health monitoring applications of civil concrete structures. In this paper, the applicability of using an embedded coaxial ETDR cable to sense structural deformation and detect load-induced crack damages of a concrete structure is investigated. Bending test were performed on small-scale concrete specimens with embedded coaxial ETDR sensors. The test results show that the deformation patterns of the concrete specimens are clearly represented and the location and magnitude of load-induced crack damages that pass the sensing line are evidently shown in the ETDR signal response of the sensor. The results of the current study demonstrate the great potentials of the ETDR technique for the health monitoring application of large civil concrete structures.

Paper Details

Date Published: 18 May 1999
PDF: 8 pages
Proc. SPIE 3671, Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways, (18 May 1999); doi: 10.1117/12.348680
Show Author Affiliations
Mark W. Lin, Clark Atlanta Univ. (United States)
Ayo O. Abatan, Clark Atlanta Univ. (United States)
Wei-Min Zhang, Clark Atlanta Univ. (United States)

Published in SPIE Proceedings Vol. 3671:
Smart Structures and Materials 1999: Smart Systems for Bridges, Structures, and Highways
S.-C. Liu, Editor(s)

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