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Open AccessArticle

Detection and Measurement of Matrix Discontinuities in UHPFRC by Means of Distributed Fiber Optics Sensing

1
Laboratory of Maintenance and Safety of Structures, Structural Engineering Institute, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
2
COSYS-SII, I4S Team (Inria), Univ Gustave Eiffel, IFSTTAR, F-44344 Bouguenais, France
3
Quadric, Artelia Group, 14 Porte de Grand Lyon, F-01700 Neyron, France
4
GeM UMR 6183, University of Nantes, F-44322 Nantes, France
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(14), 3883; https://doi.org/10.3390/s20143883
Received: 13 June 2020 / Revised: 6 July 2020 / Accepted: 7 July 2020 / Published: 12 July 2020
(This article belongs to the Special Issue Optical Sensors for Structural Health Monitoring)
Following the significant improvement in their properties during the last decade, Distributed Fiber Optics sensing (DFOs) techniques are nowadays implemented for industrial use in the context of Structural Health Monitoring (SHM). While these techniques have formed an undeniable asset for the health monitoring of concrete structures, their performance should be validated for novel structural materials including Ultra High Performance Fiber Reinforced Cementitious composites (UHPFRC). In this study, a full scale UHPFRC beam was instrumented with DFOs, Digital Image Correlation (DIC) and extensometers. The performances of these three measurement techniques in terms of strain measurement as well as crack detection and localization are compared. A method for the measurement of opening and closing of localized fictitious cracks in UHPFRC using the Optical Backscattering Reflectometry (OBR) technique is verified. Moreover, the use of correct combination of DFO sensors allows precise detection of microcracks as well as monitoring of fictitious cracks’ opening. The recommendations regarding use of various SHM methods for UHPFRC structures are given. View Full-Text
Keywords: crack detection; crack opening; distributed fiber optic sensors; DIC; UHPFRC; testing; SHM; microcracking crack detection; crack opening; distributed fiber optic sensors; DIC; UHPFRC; testing; SHM; microcracking
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MDPI and ACS Style

Sawicki, B.; Bassil, A.; Brühwiler, E.; Chapeleau, X.; Leduc, D. Detection and Measurement of Matrix Discontinuities in UHPFRC by Means of Distributed Fiber Optics Sensing. Sensors 2020, 20, 3883. https://doi.org/10.3390/s20143883

AMA Style

Sawicki B, Bassil A, Brühwiler E, Chapeleau X, Leduc D. Detection and Measurement of Matrix Discontinuities in UHPFRC by Means of Distributed Fiber Optics Sensing. Sensors. 2020; 20(14):3883. https://doi.org/10.3390/s20143883

Chicago/Turabian Style

Sawicki, Bartłomiej; Bassil, Antoine; Brühwiler, Eugen; Chapeleau, Xavier; Leduc, Dominique. 2020. "Detection and Measurement of Matrix Discontinuities in UHPFRC by Means of Distributed Fiber Optics Sensing" Sensors 20, no. 14: 3883. https://doi.org/10.3390/s20143883

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