Fatigue and post-fatigue performance of Fabry-Perot FOS installed on CFRP-strengthened RC-beams

Catalin Gheorghiu; Pierre Labossiere; Jean Proulx

doi:10.1117/12.548112

20 July 2004 Fatigue and post-fatigue performance of Fabry-Perot FOS installed on CFRP-strengthened RC-beams

Catalin Gheorghiu, Pierre Labossiere, Jean Proulx

Proceedings Volume 5393, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III; (2004) https://doi.org/10.1117/12.548112
Event: NDE for Health Monitoring and Diagnostics, 2004, San Diego, CA, United States

Abstract

There is a growing need for built-in monitoring systems for civil engineering infrastructures, due to problems such as increasing traffic loads and rising costs of maintenance and repair. Fibre optic sensors (FOS), capable of reading various parameters are promising candidates for life-long health monitoring of these structures. However, since FOS have only been introduced recently into the field of structural monitoring, their acceptance and widespread implementation will be conditioned by their durability under severe climatic and loading conditions. This paper reports on the performance of strain extrinsic FOS attached to carbon fibre reinforced polymer (CFRP) plates used to strengthen concrete structures. The specimens tested in this project are reinforced concrete (RC) beams with an additional external CFRP reinforcement. The FOS-instrumented beams were first subjected to fatigue loading for various numbers of cycles and load amplitudes. Then, they were tested monotonically to failure under four-point-bending. The test results provide an insight on the fatigue and post-fatigue behaviour of FOS used for monitoring reinforced concrete structures.

Citation Download Citation

Catalin Gheorghiu, Pierre Labossiere, and Jean Proulx "Fatigue and post-fatigue performance of Fabry-Perot FOS installed on CFRP-strengthened RC-beams", Proc. SPIE 5393, Nondestructive Evaluation and Health Monitoring of Aerospace Materials and Composites III, (20 July 2004); https://doi.org/10.1117/12.548112

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