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Title |
Sensing Capacity of FBG-FRP Strip for Near-Surface-Mounting in Concrete Corresponding to the Change of Temperature and Tensile Stress
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Authors |
서수연(Soo-Yeon Seo) ; 윤현도(Hyun-Do Yun) ; 최원창(Won-Chang Choi) ; 석승욱(Seung-Wook Seok) |
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DOI |
https://doi.org/10.11112/jksmi.2025.29.2.10 |
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Keywords |
격자기반 광섬유 센서; 섬유보강 폴리머 보강재; 온도실험; 단순인장 및 반복인장 실험; 비부착 또는 완전부착; 계측성능 Fiber bragg grating optical fiber sensor; Fiber reinforced polymer reinforcement; Temperature test; Simple tensile and repetitive tensile test; Debonding or fully bonding; Sensing capacity |
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Abstract |
In this study, the sensing capacity of FBG-FRP reinforcement, a Fiber Reinforced Polymer (FRP) reinforcement combined with a Fiber Bragg Grating (FBG) optical fiber (OF) sensor, was investigated through temperature test, simple tensile and repeated tensile test. FBG-FRP reinforcements were manufactured by debonding or fully bonding the surface of measuring part of optical fiber using epoxy between two CFRP plates, and the sensing capacity of each method was evaluated through the tests. As results, when an OF sensor is fully bonded to a CFRP plate using epoxy, a linear strain change relationship according to temperature changes was presented, and it was confirmed that the strain of the OF sensor showed almost the same value as the CFRP reinforcement with respect to monotonic increase and repetitive stress.
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