Strain Sharing Assessment in Woven Fiber Reinforced Concrete Beams Using Fiber Bragg Grating Sensors.
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.
Department of Engineering, University of Messina, Contrada di Dio, Messina I-98166, Italy. rmontanini@unime.it.
Roberto
R
Montanini
Department of Engineering, University of Messina, Contrada di Dio, Messina I-98166, Italy. arecupero@unime.it.
Antonino
A
Recupero
Department of Engineering, University of Messina, Contrada di Dio, Messina I-98166, Italy. ingfdd@aliceposta.it.
Fabrizio
F
De Domenico
Department of Engineering, University of Messina, Contrada di Dio, Messina I-98166, Italy. fabfreni@hotmail.com.
Fabrizio
F
Freni
Fiber Bragg grating sensor; embedded optical fiber sensor; fiber reinforced cementitious matrix (FRCM); rehabilitation and retrofitting; strain measurements; strain transfer mechanism; strengthened concrete structures
ScientificWorldJournal. 2014;2014:652329
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