Experimental results on embedded optical fiber sensors in concrete

Alexis Mendez; Theodore F. Morse; Lawrence J. Reinhart

doi:10.1117/12.147999

12 July 1993 Experimental results on embedded optical fiber sensors in concrete

Alexis Mendez, Theodore F. Morse, Lawrence J. Reinhart

Proceedings Volume 1918, Smart Structures and Materials 1993: Smart Sensing, Processing, and Instrumentation; (1993) https://doi.org/10.1117/12.147999
Event: 1993 North American Conference on Smart Structures and Materials, 1993, Albuquerque, NM, United States

Abstract

Experimental results are presented on the embedding of optical fiber cables into cement specimens in order to determine the feasibility and limitations of using said fibers as sensors for the measurement of internal stresses as well as the evaluation of structural integrity. Pull- out tests have revealed that the surface bonding between the plastic jacket of a fiber cable and the cement matrix is poor and inadequate for an effective load transfer. Experiments using loaded cement specimens with embedded fiber cables inside suggest that the various protective layers present in the cable's construction prevent the fibers from properly sensing any external perturbations up to the specimen's failure and, in some instances, even after failure. Therefore, use of optical fiber cables as direct sensing elements for stress/strain measurements is not recommended for most applications, due to the lack of an appropriate load transfer mechanism and sensitivity. However, they can instead be used as leads to communicate the actual embedded sensors with the outside world.

Citation Download Citation

Alexis Mendez, Theodore F. Morse, and Lawrence J. Reinhart "Experimental results on embedded optical fiber sensors in concrete", Proc. SPIE 1918, Smart Structures and Materials 1993: Smart Sensing, Processing, and Instrumentation, (12 July 1993); https://doi.org/10.1117/12.147999

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