구조물 보강용 FRP 판과 광섬유 센서가 결합된 자기감지 보강재 (Self Sensing Reinforcement Combined with Fiber-Optic Sensor and FRP Strip for Structural Reinforcement)

서지정보

· 발행기관 : 대한건축학회
· 수록지 정보 : 대한건축학회논문집 구조계 / 35권 / 8호 / 123 ~ 130페이지
· 저자명 : 송세기, 서수연, 김강수

초록

본 연구에서는 판형 FRP에 FBG 센서가 결합된 보강재를 개발하고자 한다. 이를 위하여 광섬유-FRP-에폭시 접합부의 부착강도, 격자가 형성된 FBG 센서부의 인장강도 등을 파악하고, 특히 FRF와 FBG 센서의 연결방식에 따른 성능을 파악하기 위하여 일련의 실험을 수행하였다. 연구결과, 에폭시를 이용하여 FRP에 FBG 센서를 내장하기 위해서는 최소한  216.15N/mm2의 강도발현이 필요한 것으로 나타났으며 이를 위해서는 에폭시 접합부의 부착길이를 50mm이상 확보해야하는 것으로 사료된다.

영어초록

Recently, it is required to develop a monitoring technology that combines an FBG sensor as a means for continuously monitoring whetherreinforcing effect of FRP is maintained on FRP reinforced structural members. However, most existing researches focus on the insertion ofFBG sensors into bar-shaped FRPs, and there is insufficient study on the details strip-type FRPs combined with FBG sensors. Therefore, inthis paper, it is studied to develop a reinforcement in which a FBG sensor is combined with a FRP strip. Especially, combination of FRPand FBG sensor. For this, a series of experiments were performed to find the adhesive strength of fiber-FRP-epoxy joints, the tensile strengthof FBG sensor part with reflection-lattice, and the performance depending on the connection method of FRF and FBG sensor. As a result ofthe study, it was found that a minimum strength of 216.15 N/mm2 is required for incorporating FBG sensors in FRP using epoxy. It isconsidered that the adhesion length of epoxy joints should be more than 50mm. When the FBG sensor is attached to the FRP strip as anepoxy, it is considered appropriate to use the complete attachment and the sensor non-attachment method.

참고자료

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