Applications of distributed fiber Bragg grating sensors in civil engineering

Philipp M. Nellen; Rolf Broennimann; Urs J. Sennhauser; Charles G. Askins; Martin A. Putnam

doi:10.1117/12.219626

15 September 1995 Applications of distributed fiber Bragg grating sensors in civil engineering

Philipp M. Nellen, Rolf Broennimann, Urs J. Sennhauser, Charles G. Askins, Martin A. Putnam

Proceedings Volume 2507, Distributed and Multiplexed Fiber Optic Sensors V; (1995) https://doi.org/10.1117/12.219626
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

We report on civil engineering applications of wavelength multiplexed optical-fiber Bragg grating arrays produced directly on the draw tower for testing and surveying advanced structures and material like carbon fiber reinforced concrete elements and prestressing tendons. We equipped a 6 m X 0.9 m X 0.5 m concrete cantilever beam reinforced with carbon fiber lamellas with fiber Bragg grating sensors. Static and dynamic strain levels up to 1500 micrometers /m were measured with a Michelson interferometer used as Fourier spectrometer with resolutions of about 10 micrometers /m for all sensors. Comparative measurements with electrical resistance strain gauges were in good agreement with the fiber optic results. We used the fiber sensors in two different arrangements: some Bragg grating array elements measured the local strain while others were configured in an extensometric way to measure moderate strain over 0.1-1 m.

Citation Download Citation

Philipp M. Nellen, Rolf Broennimann, Urs J. Sennhauser, Charles G. Askins, and Martin A. Putnam "Applications of distributed fiber Bragg grating sensors in civil engineering", Proc. SPIE 2507, Distributed and Multiplexed Fiber Optic Sensors V, (15 September 1995); https://doi.org/10.1117/12.219626

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