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Flexural Behaviors of Reinforced Concrete Beams Strengthened with Carbon Fiber Sheets  

Kim, Seong-Do (경성대학교 토목공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.23, no.2, 2010 , pp. 227-234 More about this Journal
Abstract
To investigate the flexural behavior of RC beams strengthened with carbon fiber sheets, 1 control beam and 8 strengthened beams(4 NU-beams without U-shaped band and 4 U-beams with U-shaped band) are tested. The variables of experiment are composed of the number of carbon fiber sheets and the existence of U-shaped band, etc. The experimental results showed that the strengthening system with U-shaped band controls the premature debonding and provides a more ductile failure mode than the strengthening system without U-shaped band. It can be found from the load-deflection curves that as the number of fiber sheets is increased, the maximum strength and the flexural rigidity is increased. The experimental results are compared with the analytical results of nonlinear flexural behaviors for strengthened RC beam. The proposed analytical method for strengthened beams is proved to be accurate by an experimental investigation of load-deflection curve, yield load, maximum load, and flexural rigidities in the pre- and post-yielding stages.
Keywords
strengthened RC beam; carbon fiber sheet; U-shaped band; flexural behavior;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 박대효, 부준성 (2002) 밑면 및 옆면 섬유시트로 보강된 철근 콘크리트 보의 휨해석, 대한토목학회 논문집, 22(5-A), pp.1045-1057.
2 정진환, 김성도, 조백순, 이우철 (2003) 탄소섬유시트로 보강된 RC 보의 공칭휨모멘트 - I. 실험적 연구, 대한토목학회논문집, 23(5A), pp.921-929.
3 정진환, 김성도, 조백순, 이우철 (2003) 탄소섬유시트로 보강된 RC 보의 공칭휨모멘트 - II. 해석적 연구, 대한토목학회 논문집, 23(5A), pp.931-938.
4 홍건호, 신영수 (2003) RC 구조물에 적용된 부착식 휨보강공법의 보강성능 평가, 한국콘크리트학회 논문집, 15(1), pp.78-86.   과학기술학회마을
5 ACI Committee 440 (2000) Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening Concrete Structures, ACI 440.2R-02.
6 El-Mihilmy, M.T., Tedesco, J.W. (2000) Analysis of Reinforced Concrete Beams Strengthened with FRP Laminates, Journal of Structural Engineering, ASCE, 126(6), pp.684-691,   DOI   ScienceOn
7 Gopalaratnam, V.S., Shah, S.P. (1985) Softening Response of Plain Concrete in Direct Tension, ACI Journal, 82(3), pp.310-323.
8 Gopalaratnam, V.S., Shah, S.P., Batson, G.B., Criwell, M.E., Ramakrishinan, V., Wecharatana, M. (1991) Fracture Toughness of Fiber Reinforced Concrete, ACI Materials Journal, 88(4), pp.339-353.
9 Shah, S.P., Fafitis, A., Arnold, R. (1983) Cyclic Loading of Spirally Reinforced Concrete, Journal of Structural Engineering, 109(7), pp.1695-1710.   DOI   ScienceOn