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Sensors 2016, 16(10), 1564; doi:10.3390/s16101564

Strain Sharing Assessment in Woven Fiber Reinforced Concrete Beams Using Fiber Bragg Grating Sensors

Department of Engineering, University of Messina, Contrada di Dio, Messina I-98166, Italy
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Academic Editor: Vittorio M. N. Passaro
Received: 28 July 2016 / Revised: 9 September 2016 / Accepted: 19 September 2016 / Published: 22 September 2016
(This article belongs to the Section Physical Sensors)
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Abstract

Embedded fiber Bragg grating sensors have been extensively used worldwide for health monitoring of smart structures. In civil engineering, they provide a powerful method for monitoring the performance of composite reinforcements used for concrete structure rehabilitation and retrofitting. This paper discusses the problem of investigating the strain transfer mechanism in composite strengthened concrete beams subjected to three-point bending tests. Fiber Bragg grating sensors were embedded both in the concrete tensioned surface and in the woven fiber reinforcement. It has been shown that, if interface decoupling occurs, strain in the concrete can be up to 3.8 times higher than that developed in the reinforcement. A zero friction slipping model was developed which fitted very well the experimental data. View Full-Text
Keywords: Fiber Bragg grating sensor; embedded optical fiber sensor; strengthened concrete structures; rehabilitation and retrofitting; strain measurements; fiber reinforced cementitious matrix (FRCM); strain transfer mechanism Fiber Bragg grating sensor; embedded optical fiber sensor; strengthened concrete structures; rehabilitation and retrofitting; strain measurements; fiber reinforced cementitious matrix (FRCM); strain transfer mechanism
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Montanini, R.; Recupero, A.; De Domenico, F.; Freni, F. Strain Sharing Assessment in Woven Fiber Reinforced Concrete Beams Using Fiber Bragg Grating Sensors. Sensors 2016, 16, 1564.

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