Low-coherence deformation sensors for the monitoring of concrete structures

Samuel Vurpillot; Daniele Inaudi; Pierre Mivelaz

doi:10.1117/12.219629

15 September 1995 Low-coherence deformation sensors for the monitoring of concrete structures

Samuel Vurpillot, Daniele Inaudi, Pierre Mivelaz

Proceedings Volume 2507, Distributed and Multiplexed Fiber Optic Sensors V; (1995) https://doi.org/10.1117/12.219629
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

A deformation monitoring system, based on low-coherence interferometry in standard telecommunication fibers embedded in concrete structures, is presented. This measuring system, developed for the needs of civil engineering, features a precision of 10 micrometers over measuring length of up to 100 m. Extensive tests have been carried out on a number of 1 m X 5 m X 0.5 m high-performance reinforced concrete ties, within a research on seepage flow through cracked elements. The presented system allowed the internal measurement of the deformations during the whole setting process (including the thermal expansion phase), of the deformations during the tensile test and of the crack openings evolution. This paper presents the operating principle of the low- coherence interferometer, the lessons learned in installing optical fibers in concrete structures, as well as a comparison with the measurements performed by standard sensors installed on the structure surface.

Citation Download Citation

Samuel Vurpillot, Daniele Inaudi, and Pierre Mivelaz "Low-coherence deformation sensors for the monitoring of concrete structures", Proc. SPIE 2507, Distributed and Multiplexed Fiber Optic Sensors V, (15 September 1995); https://doi.org/10.1117/12.219629

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