Journal of the Korea Concrete Institute (콘크리트학회논문집)

Korea Concrete Institute (한국콘크리트학회)
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Prediction of the Shear Strength of FRP Strengthened RC Beams (I) - Development and Evaluation of Shear strength model -

FRP로 전단 보강된 철근콘크리트 보의 전단강도 예측 (I) - 전단강도 예측 모델제안 및 검증 -

  • Sim Jong-Sung (Dept. of Civil and Environment Engineering, Hanyang University) ;
  • Oh Hong-Seob (Dept. of Civil Engineering, Jinju National University) ;
  • Moon Do-Young (Dept. of Civil and Environment Engineering, Hanyang University) ;
  • Park Kyung-Dong (Div. of Civil Works, LOTTE Engineering & Construction)
  • Published : 2005.06.01
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Abstract

This study developed a shear strength prediction model of FRP strengthened reinforced concrete beams in shear. The primary design parameters were shear crack angle and shear span to depth ratio of FRP reinforcement. Of primary concern In the suggested model was the FRP debonding failure, which Is a typical fracture mode of RC beams strengthened with FRP, The proposed model used a crack sliding model based on modified plasticity theory. To address the effect of the shear span to depth ratio, the arch action was considered in the proposed model. The proposed model was applied to RC beams strengthened with FRP. The results showed that the proposed model agree with test results.

본 논문에서는 FRP 외부 부착공법으로 전단 보강된 철근콘크리트 보의 전단강도 예측 모델을 제안하였다. 제안된 모델은 전단 균열각과 전단 경간비와 같은 주요한 설계인자를 고려할 수 있도록 하였다. 제안된 모델의 주요고려사항은 ]nP로 전단 보강된 보의 일반적 파괴 형태인 부착파괴에 대한 전단력 산정이다. 또한 제안된 모델은 기존의 수정 소성이론에 근거한 crack sliding model을 이용하였으며, 아치작용계수를 도입함으로써, 전단 경간비의 영향을 최소화하였다. 최종적으로 본 전단강도 예측 모델을 적용한 해석결과를 실험결과와 비교$\cdot$검증하였으며, 본 제안된 예측 모델이 실험결과와 상당히 일치하는 것을 확인하였다.

Keywords

References

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