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Field tests of fibre Bragg grating sensors incorporated into CFRP for railway bridge strengthening condition monitoring
School of Engineering and Mathematical Sciences, City University London.
School of Engineering and Mathematical Sciences, City University London.
School of Engineering and Mathematical Sciences, City University London.
School of Engineering and Mathematical Sciences, City University London.
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2008 (English)In: Sensors and Actuators A-Physical, ISSN 0924-4247, E-ISSN 1873-3069, Vol. 148, no 1, p. 68-74Article in journal (Refereed) Published
Abstract [en]

The EU is in the process of upgrading the national railway networks to meet the demands from high-speed passenger trains and heavy Freight traffic. This upgrade necessitates a review of the development and implementation of novel technologies to repair and strengthen the existing bridge structures and to improve their performance.This paper presents the evaluation results of the use of FBG strains sensors incorporated in CFRP (carbon fibre reinforcement polymer) rods and tubes as part of the methodology for monitoring the performance of the NSMR (near surface mounted reinforcement) which is an essential part of the repair and strengthening of bridges. In addition, a new method has been tested for the first time using CFRP tubes which calls for the drilling of holes instead of sawing grooves in the installation process.The paper discusses in some detail the strengthening mechanism, FBG sensor implementation and the electronic system used to interrogate the FBG sensors. The results obtained from the monitoring show that FBG sensors can be integrated into CFRP and that reliable measurements can be made. However, in this particular project, the strain loading is very moderate so consequently the strain levels are in the elastic regime.

Place, publisher, year, edition, pages
2008. Vol. 148, no 1, p. 68-74
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-3478DOI: 10.1016/j.sna.2008.07.014ISI: 000260804500012Scopus ID: 2-s2.0-55349124916Local ID: 14ec0d80-c3c9-11dd-80bd-000ea68e967bOAI: oai:DiVA.org:ltu-3478DiVA, id: diva2:976336
Note
Validerad; 2008; 20081206 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Täljsten, BjörnBennitz, Anders

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