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Proceedings Paper

Low-coherence deformation sensors for the monitoring of concrete structures
Author(s): Samuel Vurpillot; Daniele Inaudi; Pierre Mivelaz
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Paper 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.

Paper Details

Date Published: 15 September 1995
PDF: 10 pages
Proc. SPIE 2507, Distributed and Multiplexed Fiber Optic Sensors V, (15 September 1995); doi: 10.1117/12.219629
Show Author Affiliations
Samuel Vurpillot, Swiss Federal Institute of Technology (Switzerland)
Daniele Inaudi, Swiss Federal Institute of Technology (Switzerland)
Pierre Mivelaz, Swiss Federal Institute of Technology (Switzerland)


Published in SPIE Proceedings Vol. 2507:
Distributed and Multiplexed Fiber Optic Sensors V
John P. Dakin; Alan D. Kersey, Editor(s)

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