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Comportements de Capteurs à Fibres Optiques, noyés ou fixés en surface d'ouvrages en béton

Abstract : The use of optical fibre sensors is being usual in Civil Engineering, and especially for strain measurements in the core or on surface of the structure materials. The metrological performances reached by such instrumentation in real conditions, particularly in concrete, depend on the filtering effect created simultaneously by the sensor structure, the interfaces between the environment and the active part of the measuring element, the presence of heterogeneities, and the inclusion effect within the medium. Some data are accessible (e.g.: geometrical quantities). In opposite, others data were determined from hypothesis and experimental validations (e.g.: behaviours of an assembling, made up of materials with different physical and mechanical properties). Numerical finite elements modelling were realised in order to understand better the phenomena involved and then, to help the user to analyse the data measured by optical fibres. Several models were tested, specially focussing on the influence of rigidity, of the fastening conditions and the sensors geometry. At the same time, comparisons were made with experiments realised in laboratory. Thus recommendations could be drawn out from these studies, to improve such sensors design and their setting on structures.
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https://pastel.archives-ouvertes.fr/tel-00001971
Contributor : James Dupont <>
Submitted on : Saturday, November 16, 2002 - 10:57:43 PM
Last modification on : Friday, March 27, 2015 - 4:02:23 PM
Long-term archiving on: : Friday, April 2, 2010 - 6:14:11 PM

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  • HAL Id : tel-00001971, version 1

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James Dupont. Comportements de Capteurs à Fibres Optiques, noyés ou fixés en surface d'ouvrages en béton. Matériaux. Ecole des Ponts ParisTech, 2002. Français. ⟨tel-00001971⟩

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