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Materials 2018, 11(1), 7;

Fibre Bragg Gratings for the Monitoring of Wooden Structures

Department of Engineering, University of Perugia, via Duranti, 93-06125 Perugia, Italy
Author to whom correspondence should be addressed.
Received: 26 October 2017 / Revised: 29 November 2017 / Accepted: 14 December 2017 / Published: 21 December 2017
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The aim of this work was to develop and validate an experimental methodology suitable for analysing on-site the behaviour of fibre-reinforced wooden structures. The proposed measurement method is based on the application of fibre Bragg grating (FBG) strain sensors. An analysis of adhesive behaviour was performed preliminarily, which provided indications for choosing the type of adhesive and for the fibre bonding length in accordance with the volume of measurement. The first series of tests was carried out on wood samples to verify the coupling between the measuring sensor and the wood support when the latter is subject to mechanical stresses. The second investigation was done on site to test the behaviour of a historical wood floor before and after reinforcement by means of a series of tests performed using optical fibres with the Bragg grating. The optical fibre system measurements were compared to those obtained using a laser vibrometer, a measurement system of proven stability and precision. The comparison makes it possible to confirm the validity of the results and the reliability of the system for the monitoring of historic wooden structures. View Full-Text
Keywords: optical fibre; FBG sensor; wood; strain analysis; experimental analysis; monitoring optical fibre; FBG sensor; wood; strain analysis; experimental analysis; monitoring

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Marsili, R.; Rossi, G.; Speranzini, E. Fibre Bragg Gratings for the Monitoring of Wooden Structures. Materials 2018, 11, 7.

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