KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지

Fracture Mechanics Based Bond-Slip Models for the Interface between FRP and Concrete

FRP-콘크리트 계면의 파괴 역학적 부착 모델

Cho, Keun-Hee;Cho, Jeong-Rae;Lee, Young-Ho;Kim, Byung-Suk
조근희;조정래;이영호;김병석

  • Published : 2004.07.31

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Abstract

The behavior of silica coating and epoxy adhesive joints, which are used in interface between FRP plate and concrete, is investigated, and bond-slip model for each type of joint is presented. Each bond-slip model is obtained by the optimization method that minimizes the difference between the analytic solution of a bond-slip model based on fracture mechanics and experimental data. Multiobjective optimization problem is constructed by physical programming, and the optimized bond-slip model is found using genetic algorithm. The validity far the presented formulation and bond-slip model is verified comparing with experimental and numerical analysis results. Two bondiry methods considered in this study have almost equal bond performances, while their bond-slip models have different characteristics.

FRP판과 콘크리트 사이의 계면에 적용되는 규사 코팅 및 에폭시 처리 부착 방법의 거동 특성을 고찰하고, 이에 대한 부착 모델을 제시하였다. 부착 모델은 파괴역학에 기초한 해석해와 전단 부착 실험 결과와의 차이를 최소화하는 방법으로 구하였다. 이 때 최적화 문제는 Physical Programming 기법에 의해 구성하고 Genetic Algorithm을 통하여 최적화를 수행 하였다. 전단 및 휨 부착 실험 결과와 이 연구에서 제시한 부착모델을 이용한 해석 결과를 비교함으로써 제시된 정식화 방법 및 부착 모델의 타당성을 확인하였다. 연구에서 고려한 2가지 부착 방법은 거동 특성면에서는 약간 차이가 있으나, 성능 면에서는 큰 차이를 보이지 않는다.

Keywords

References

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