DOI QR코드

DOI QR Code

A Study on the Prediction Model of Shear Strength of RC Beams Strengthened for Shear by FRP

섬유보강재로 전단보강된 RC보의 전단강도예측을 위한 해석모델에 대한 연구

  • 심종성 (한양대학교 토목·환경공학과) ;
  • 오홍섭 (한양대학교 토목·환경공학과) ;
  • 유재명 (한양대학교 토목·환경공학과)
  • Published : 2000.10.01

Abstract

In this paper, an analytical model is proposed to predict the shear strenth of RC beams strengthened by FRP. This predictional model is composed of two basic models-the upper bound theorem for shear failure (shear tension or shear compression criteria) and a truss model based on the lower bound theorem for diagonal tension creteria. Also, a simple flexural theory based on USD is used to explain flexural failure. The major cause of destruction of RC beams shear strengthened by FRP does not lie in FRP fracture but in the loss of load capacity incurred by rip-off failure of shear strengthening material. Since interfacial shear stree between base concrete and the FRP is a major variable in rip-off failure mode, it is carefully analyzed to derive the shear strengthening effect of FRP. The ultimate shear strength and failure mode of RC beams, using different strengthening methods, estimated in this predictional model is then compared with the result derived from destruction experiment of RC beams shear strengthened using FRP. To verify the accuracy and consistency of the analysis, the estimated results using the predictional model are compared with various other experimental results and data from previous publications. The result of this comparative analysis showed that the estimates from the predictional model are in consistency with the experimental results. Therefore, the proposed shear strength predictional model is found to predict with relative accuracy the shear strength and failure mode of RC beams shear strengthened by FRP regardless of strengthening method variable.

Keywords

References

  1. 한국카본 탄소섬유쉬트 보강보의 성능평가 실험 박칠림
  2. 한국콘크리트학회지 v.8 no.5 철근콘크리트 보의 전단설계를 위한 개념과 배경 윤영수
  3. 한국콘크리트학회지 v.10 no.4 FRP로 보강된 RC보의 전단보강 효과 비교연구 심종성;김규선
  4. 탄소섬유시트 보강부재의 구조성능연구 신성우;반병렬;이광수
  5. 프리믹스형 보수재료를 적용한 R/C구조물의 보수 및 섬유보강공법 개발 건설교통부
  6. ACI Structural Journal Shear Repair for Reinforced Concrete by Fiberglass Plate Bonding AI-Sulaimani(et al.)
  7. Magazine of Concrete Research v.26 no.89 Plastic Analysis of Shear in Reinforced Concrete Braestrup, M.W.
  8. Comite Euro International du Beton CEB-FIP Model Code 1990
  9. IABSE Memories v.36-Ⅱ Ultimate Strength and Design of Reinforced Concrete Beams under Bending and Shear Grob;Thurlimann, B.
  10. Magazine of Concrete Research v.39 no.140 Shear and Moment Capacity of Reinforced Steel-Fibre-Concrete Beams Lim, T.Y.
  11. Reinforced Concrete Macgregor, J.G.
  12. Limit Analysis and Concrete Plasticity(2nd Edition) Nielsen, M.P.
  13. Bygningsstalixke Meddelelser v.46 no.3 Plastic Shear Strength of Reinforced Concrete Beams Nielsen, M.P.;Braestrup, M.W.
  14. IABSE Colloquium on Plasticity in Reinforced Concrete, Copenhagen, 1979 Introductory Report v.26 no.89 Plastic Analysis of Reinforced Concrete Beams Thurlimann, B.
  15. Civil and Public Works Review v.58 Some Aspects of the Problem of Shear in Reinforced Concrete Beams Tayler, R.