Crack Detection of a 15 Meter Long Reinforced Concrete Girder with a Single Distributed Cable Sensor


A new concept of designing cable sensors for health monitoring of large-scale civil infrastructures has recently been proposed by the authors. The concept was developed based on the change in topology of the outer conductor of a coaxial cable sensor. One such sensor was fabricated with its outer conductor tightly wrapped with tin plated steels that are covered by soldering. It was mounted near the surface of a 15 m long reinforced concrete girder with a 762 mm square hollow cross section and 152 mm thick walls. The girder was tested under a progressively increasing cyclic torsion creating 45° inclined cracks around and along the girder. The main objectives of this study are to implement the distributed cable sensor technology in large-scale reinforced concrete structures, to understand the performance of a sensor under cyclic loading for detecting and locating cracks, and, finally, to address a number of implementation issues including signal loss, non-uniformity, recoverability and measurement uncertainty.

Meeting Name

1st International Conference on Structural Health Monitoring and Intelligent Infrastructure (2003: Nov. 13-15, Tokyo, Japan)


Civil, Architectural and Environmental Engineering

Second Department

Electrical and Computer Engineering

Keywords and Phrases

Civil Infrastructures; Coaxial Cable Sensors; Cyclic Loadings; Cyclic Torsion; Distributed Cable Sensors; Health Monitoring; Hollow Cross-Sections; Inclined Crack; Measurement Uncertainty; Nonuniformity; Recoverability; Signal Loss; Thick-Wall; Tin Plated Steel; Concrete Beams And Girders; Concrete Buildings; Crack Detection; Reinforced Concrete; Uncertainty Analysis; Structural Health Monitoring

International Standard Book Number (ISBN)


Document Type

Article - Conference proceedings

Document Version


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© 2003 CRC Press, All rights reserved.

Publication Date

01 Nov 2003

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