[논문]Strain Transfer of Fiber Bragg Grating Sensor Externally Bonded to FRP Strip for Structural Monitoring after Reinforcement

Seo, Soo-Yeon; Park, Jeong-Hun; Yun, Hyun-Do; Kim, Kang-Su; Lee, Gun-Cheol; Hong, Seongwon

doi:10.3390/ma14164382

[해외논문] Strain Transfer of Fiber Bragg Grating Sensor Externally Bonded to FRP Strip for Structural Monitoring after Reinforcement 원문보기

Materials, v.14 no.16, 2021년, pp.4382 -

Seo, Soo-Yeon (Department of Architectural Engineering, Korea National University of Transportation, Chungju 27469, Korea) , Park, Jeong-Hun (gclee@ut.ac.kr) , Yun, Hyun-Do (M.C.S. Structural Engineering Co. Ltd., Seoul 05836, Korea) , Kim, Kang-Su (pjh4198@naver.com) , Lee, Gun-Cheol (Department of Architectural Engineering, Chungnam National University, Daejeon 34143, Korea) , Hong, Seongwon (wiseroad@cnu.ac.kr)

Abstract ▼ AI-Helper

To date, a method of attaching a FRP (fiber-reinforced polymer) to concrete members with epoxy has been widely applied to increase the strength of the member. However, there are cases in which the adhesion of the epoxy deteriorates over time and the reinforcing effect of the FRP is gradually lost. Therefore, monitoring whether or not the reinforcing effect is properly maintained is needed in order to prevent a decrease in the structural performance of the member improved by FRP reinforcement. In this regard, this study examines FRP with OF (optical fiber) sensors to monitor the reinforcing effect of FRP in concrete structural members. In particular, this paper seeks to determine an appropriate adhesion length when FBG (fiber Bragg grating) based OF sensors are externally bonded to FRP strips with epoxy resin. To this end, a tensile test was carried out to evaluate the sensing performance according to the adhesion length. In addition, an analytical approach was performed and the result were compared with test result. The results of the experimental and analytical studies showed that the strain generated in the FRP is sufficiently transferred to the OF if the total adhesion length of it is 40 mm or more in consideration of the error in the epoxy thickness.

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참고문헌 (31)

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[해외논문] Strain Transfer of Fiber Bragg Grating Sensor Externally Bonded to FRP Strip for Structural Monitoring after Reinforcement 원문보기

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[해외논문] Strain Transfer of Fiber Bragg Grating Sensor Externally Bonded to FRP Strip for Structural Monitoring after Reinforcement 원문보기

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