Assessment and visualization of performance indicators of reinforced concrete beams by distributed optical fibre sensing
| Autor: | Joan R. Casas, Mattia Francesco Bado, Ignasi Fernandez, Carlos Gil Berrocal, Rasmus Rempling |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Enginyeria de la Construcció, Universitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental, Universitat Politècnica de Catalunya. EC - Enginyeria de la Construcció |
| Rok vydání: | 2021 |
| Předmět: |
Optical fiber
Performance indicators Computer science 0211 other engineering and technologies Biophysics Phase (waves) Mechanical engineering 020101 civil engineering 02 engineering and technology Optical fiber detectors Distributed optical fibre sensing 0201 civil engineering law.invention law SAFER 021105 building & construction Mechanical Engineering Enginyeria civil::Materials i estructures::Materials i estructures de formigó [Àrees temàtiques de la UPC] Reinforced concrete Visualization Rayleigh backscattering Detectors de fibra òptica Performance indicator Structural health monitoring Concrete -- Cracking Crack monitoring Formigó -- Fissuració |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| ISSN: | 1741-3168 1475-9217 |
| DOI: | 10.1177/1475921720984431 |
| Popis: | 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. The author(s) disclosed receipt of the following financial support for the research, authorship and/or publication of this article: This research was performed as part of the project: ‘Sensor-driven Cloud-based Strategies for Infrastructure Management – SensIT’ funded by the Swedish Transport Administration (Trafikverket) under the grant TRV/BBT 2017-028. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|