Stress Monitoring of Concrete Using Embedded Optical Fiber Sensors
Publication: Journal of Structural Engineering
Volume 119, Issue 7
Abstract
Fiber‐optic sensors have been deployed successfully in the monitoring of composite structures such as aircraft. At present there is considerable interest in using these sensors to measure the curing, strain, and long‐term integrity of civil structures. This study presents the use of an embedded multimode optical fiber to monitor load‐to‐failure testing of a reinforced concrete beam. The procedure for embedding fiber‐optics sensors into a reinforced concrete beam is described as are the various and sundry details, e.g., connections and instrumentation. A key issue relating to this study is the survivability of fiber‐optic sensors, embedded in concrete structures, particularly during the curing process. This has been evaluated by monitoring the intensity transmissibility during a 28‐day cure cycle. Intensity transmission measurements and optical time domain reflectometry (OTDR) analysis of the embedded fiber‐optic sensors were conducted during a load‐to‐failure test. High correlation of the embedded fiber fault locations and stress‐induced failure points in the beam was observed.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 119 • Issue 7 • July 1993
Pages: 2263 - 2269
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Jul 24, 1991
Published online: Jul 1, 1993
Published in print: Jul 1993
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