Assessment and visualization of performance indicators of reinforced concrete beams by distributed optical fibre sensing

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Gil Berrocal, Carlos,1986Chalmers tekniska högskola,Chalmers University of Technology (author)

Assessment and visualization of performance indicators of reinforced concrete beams by distributed optical fibre sensing

Article/chapterEnglish2021

Publisher, publication year, extent ...

2021-01-18
SAGE Publications,2021
electronicrdacarrier

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LIBRIS-ID:oai:research.chalmers.se:d58ef9c2-79dc-458f-833e-14db5948e1cc
https://research.chalmers.se/publication/522011URI
https://doi.org/10.1177/1475921720984431DOI
https://research.chalmers.se/publication/523254URI

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Language:English
Summary in:English

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Subject category:art swepub-publicationtype
Subject category:ref swepub-contenttype

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The implementation of structural health monitoring systems in civil engineering structures already in the construction phase could contribute to safer and more resilient infrastructure. Due to their lightweight, small size and high resistance to the environment, distributed optical fibre sensors stand out as a very promising technology for damage detection and quantification in reinforced concrete structures. In this article, the suitability of embedding robust distributed optical fibre sensors featuring a protective sheath to accurately assess the performance indicators, in terms of vertical deflection and crack width, of three reinforced concrete beams subjected to four-point bending is investigated. The results revealed that a certain strain attenuation occurs in embedded robust distributed optical fibre sensors compared to commonly used thin polyimide-coated distributed optical fibre sensors bonded to steel reinforcement bars. However, the presence of the protective sheath prevented the appearance of strain reading anomalies which has been a frequently reported issue. Performance wise, the robust distributed optical fibre sensors were able to provide a good estimate of the beam deflections with errors of between 12.3% and 6.5%. Similarly, crack widths computed based on distributed optical fibre sensor strain measurements differed by as little as ±20 µm with results from digital image correlation, provided individual cracks could be successfully detected in the strain profiles. Finally, a post-processing procedure is presented to generate intuitive contour plots that can help delivering critical information about the element’s structural condition in a clear and straightforward manner.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering hsv//eng
TEKNIK OCH TEKNOLOGIER Samhällsbyggnadsteknik Infrastrukturteknik hsv//swe
ENGINEERING AND TECHNOLOGY Civil Engineering Infrastructure Engineering hsv//eng
Reinforced concrete
performance indicators
Rayleigh backscattering
distributed optical fibre sensing
crack monitoring

Added entries (persons, corporate bodies, meetings, titles ...)

Fernandez, Ignasi,1984Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)fignasi (author)
Bado, Mattia Francesco,1991Universitat Politecnica de Catalunya,Polytechnic University of Catalonia(Swepub:cth)bado (author)
Casas, Joan RamonUniversitat Politecnica de Catalunya,Polytechnic University of Catalonia (author)
Rempling, Rasmus,1976Nordic Construction Company AB - NCC,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)rasmremp (author)
Chalmers tekniska högskolaUniversitat Politecnica de Catalunya (creator_code:org_t)

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In:Structural Health Monitoring: SAGE Publications20:6, s. 3309-33261475-92171741-3168

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