American Society of Civil Engineers


Laboratory Evaluation of Fiber-Optic Sensors for Strain Monitoring


by Burong Zhang, (Postdoctoral Fellow, ISIS-Canada, Dept. of Civ. Engrg., Univ. de Sherbrooke, Sherbrooke PQ, Canada J1K 2R1), Brahim Benmokrane, (Prof., ISIS-Canada, Dept. of Civ. Engrg., Univ. de Sherbrooke, Sherbrooke PQ, Canada J1K 2R1), and Jean-Francois Nicole, (Master’s Student, ISIS-Canada, Dept. of Civ. Engrg., Univ. de Sherbrooks, Sherbrooke PQ, Canada J1K 2R1)

Journal of Materials in Civil Engineering, Vol. 15, No. 4, July/August 2003, pp. 381-390, (doi:  http://dx.doi.org/10.1061/(ASCE)0899-1561(2003)15:4(381))

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Document type: Journal Paper
Abstract: This paper presents laboratory experimental results on new Fabry-Perot fiber-optic sensors to verify their behavior and applicability for strain monitoring of engineering materials and structures. The research program consisted of thermal tests, tensile tests, and flexural tests. Two types of Fabry-Perot fiber-optic sensors were investigated and compared to electrical resistance strain gauges and fiber Bragg gratings. Experimental results show that Fabry-Perot fiber-optic sensors perform linearly in monitoring tensile and compressive strains of infrastructure elements, and demonstrate good response to thermal variations and static and dynamic loading conditions. The fiber-optic sensing technology shows an enhanced accuracy and has potential for significant improvement in long-term strain monitoring over conventional strain gauges in field applications.


ASCE Subject Headings:
Elasticity
Fiber reinforced polymer
Probe instruments
Strain gages
Thermal factors