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Assessment and visu...
Assessment and visualization of performance indicators of reinforced concrete beams by distributed optical fibre sensing
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- Gil Berrocal, Carlos, 1986 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fernandez, Ignasi, 1984 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Bado, Mattia Francesco, 1991 (author)
- Universitat Politecnica de Catalunya,Polytechnic University of Catalonia
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- Casas, Joan Ramon (author)
- Universitat Politecnica de Catalunya,Polytechnic University of Catalonia
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- Rempling, Rasmus, 1976 (author)
- Nordic Construction Company AB - NCC,Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2021-01-18
- 2021
- English.
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In: Structural Health Monitoring. - : SAGE Publications. - 1475-9217 .- 1741-3168. ; 20:6, s. 3309-3326
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Abstract
Subject headings
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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
- 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)
Keyword
- Reinforced concrete
- performance indicators
- Rayleigh backscattering
- distributed optical fibre sensing
- crack monitoring
Publication and Content Type
- art (subject category)
- ref (subject category)
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