셀프센싱 상시계측 기반 CFRP보강 콘크리트 구조물의 손상검색

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김영진;박승희;진규남;이창길
Kim, Young-Jin;Park, Seung-Hee;Jin, Kyu-Nam;Lee, Chang-Gil

  • 투고 : 2011.05.03
  • 심사 : 2011.07.18
  • 발행 : 2011.10.30

초록

본 논문에서는 콘크리트 보의 표면에 부착된 CFRP (Carbon Fiber Reinforced Plastic) 보강재의 박리 손상 진단을 위한 구조 건전성 모니터링 기법을 소개한다. 이를 위해 압전 능동 센서를 이용한 셀프센싱 회로 기반의 다중 스케일 계측 기법이 적용되었다. 다중 스케일 계측 시스템으로부터 셀프센싱 임피던스 계측을 통한 주파수 영역 구조 응답 및 셀프센싱 유도 초음파 계측을 통한 특정 주파수에서의 구조 응답을 획득할 수 있다. 박리 손상의 정량화를 위하여 임피던스 및 유도 초음파 신호로부터 추출된 손상 특성을 이용하여 2차원 손상 지수를 도출하고 이를 지도학습 기반 확률론적 패턴인식 기법에 적용하였다.

키워드

CFRP 박리 손상;다중 스케일 계측 시스템;임피던스;유도 초음파;지도학습 기반 패턴인식 기법

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