비파괴검사학회지 (Journal of the Korean Society for Nondestructive Testing)

  • 제32권1호
  • /
  • Pages.34-40
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  • 2012
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  • 1225-7842(pISSN)
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  • 2287-402X(eISSN)
한국비파괴검사학회 (The Korean Society for Nondestructive Testing)
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FRP 보강판 부착 콘크리트에서 유도초음파 모드 거동에 대한 접착층의 영향

Effect of Bonding Layer on Guided Wave Mode Behavior in FRP Plate Bonded on Concrete

  • 이용주 (부경대학교 공과대학 안전공학과) ;
  • 신성우 (부경대학교 공과대학 안전공학과)
  • Lee, Yong-Ju (Department of Safety Engineering, Pukyong National University) ;
  • Shin, Sung-Woo (Department of Safety Engineering, Pukyong National University)
  • 투고 : 2012.01.05
  • 심사 : 2012.02.10
  • 발행 : 2012.02.28
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초록

본 연구에서는 FRP 보강판 부착 콘크리트에서의 유도초음파 기본 모드의 전파 특성에 부착제인 epoxy의 두께와 물성이 미치는 영향을 알아보고자 하였으며, 이를 위해 FRP-epoxy-concrete로 구성된 다층 유도초음파 시스템을 모델링하고 모드 해석을 수행하였다. Epoxy 층의 두께와 탄성계수를 변수로 하여 해석을 수행한 결과, A0 모드에 비해 S0 모드가 epoxy 층의 두께와 탄성계수 변화에 큰 영향을 받으며, 이로부터 경계층인 Epoxy 층의 상태 평가에는 A0 모드에 비해 S0 모드가 유효하리라는 결론을 얻었다.

In this study, effects of bonding agent, e.g. epoxy, on the behavior of fundamental guided wave modes propagated in FRP plate bonded on a concrete, are investigated. Global matrix model of multilayered FRP-epoxy-concrete system was constructed to obtain the velocity and attenuation dispersion curves of the fundamental A0 and S0 modes. Two variables, thickness and elastic modulus of epoxy layer, were considered in the dispersion analysis. It was found that both the thickness and the elastic modulus of epoxy layer greatly affect the phase velocity and attenuation of S0 mode while those are negligible for A0 mode. Based on the results, it was concluded that S0 mode is more effective than A0 mode for bonding condition assessment for FRP plate bonded concrete.

키워드

참고문헌

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