Journal of the Korean Society for Nondestructive Testing (비파괴검사학회지)

The Korean Society for Nondestructive Testing (한국비파괴검사학회)
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Application and Improvement of Surface Wave Transmission Technique for Measuring the Crack Depth in Reinforced Concrete Members

철근 콘크리트 부재의 균열 깊이 측정을 위한 표면파 투과기법의 적용 및 개선

  • Min, Ji-Young (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kim, Jae-Hong (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Kwak, Hyo-Gyoung (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology) ;
  • Yun, Chung-Bang (Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
  • 민지영 (한국과학기술원 건설 및 환경공학과) ;
  • 김재홍 (한국과학기술원 건설 및 환경공학과) ;
  • 곽효경 (한국과학기술원 건설 및 환경공학과) ;
  • 윤정방 (한국과학기술원 건설 및 환경공학과)
  • Published : 2008.04.30
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Abstract

In order to assess the existing infrastructures, it is required to measure the crack depth of concrete members. This paper considers the surface wave transmission technique to measure the crack depth. In special, we demonstrate the effect of reinforced bar on surface wave propagation and conclude that the surface wave transmission technique has only the minor error by the reinforced bar. In addition, we propose and validate the optimal window size for eliminating various reflection waves from the boundary of members.

기존 사회기반 시설의 안전성 평가를 위해서는, 콘크리트 부재에 존재하는 균열에 대해 정량적인 평가가 필요하다. 이 논문에서는 균열의 깊이를 측정할 수 있는 비파괴검사 중 표면파 투과기법에 대해 고찰하였다. 특히, 콘크리트 부재 내부에 위치하는 철근이 표면파에 미치는 영향을 분석하여, 표면파 투과기법을 통한 균열깊이 추정 시 철근에 의해 발생하는 오차가 크지 않음을 확인하였다. 또한, 콘크리트 부재의 형상에 따라 발생하는 여러 반사파의 영향을 최소화하기 위해 치적의 윈도우 크기를 제안하여 그 타당성을 검증하였다.

Keywords

References

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