Browse > Article

Flexural Behaviors of Reinforced Concrete Beams Strengthened with Glass Fiber Sheets  

Kim, Seong-Do (경성대학교 건설환경공학부)
Cho, Baik-Soon (인제대학교 건설기술연구소 토목공학과)
Seong, Jin-Wook (경성대학교 대학원 토목공학과)
Publication Information
Journal of the Korean Society for Railway / v.12, no.3, 2009 , pp. 388-395 More about this Journal
Abstract
To investigate the flexural behavior of RC beams strengthened with glass 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 glass fiber sheets and the existence of U-shaped band, etc. The maximum load was increased by 48% and 34%, and the flexural rigidity by 920% and 880% for NU-beam and U-beam, respectively, compared with those of the control beam. The ductility ratios were 1.43$\sim$2.60 for NU-beam and U-beam. 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 experimental and analytical results were well agreed.
Keywords
strengthened RC beam; glass fiber sheet; U-shaped band; flexural behavior;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
1 최완철, 연규석, 홍영균(1995), "철근 콘크리트 보수보강 재료 및 공법," 콘크리트학회지, 제7권, 제6호, pp. 4-13
2 홍건호, 신영수(2003), "RC 구조물에 적용된 부착식 휨보강공법의 보강성능 평가," 한국콘크리트학회논문집, 제15권, 제1호, pp. 78-86
3 정진환, 김성도, 조백순, 이우철(2003), "탄소섬유시트로 보강된 RC 보의 공칭휨모멘트 - I. 실험적 연구," 대한토목학회논문집, 제23권, 제5A호, pp. 921-929
4 Gopalaratnam, V. S., Shah, S. P., Batson, G. B., Criwell, M. E., Ramakrishinan, V., and Wecharatana, M.(1991), Fracture Toughness of Fiber Reinforced Concrete," ACI Meterials Journal, Vol. 88, No. 4, pp. 339-353
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 Gopalaratnam, V. and Shah, S.P.(1985), "Softening Response of Plain Concrete in Direct Tension," ACI Journal, Vol. 82, No. 3, pp. 310-323
7 서석영, 정진환, 김성도, 조백순, 박정용(2005), "유리섬유시트로 보강된 RC보의 휨거동 특성에 관한 연구," 한국콘크리트학회 2005년도 가을 학술발표회 논문집, pp. 161-164
8 EI-Mihilmy, M.T. and Tedesco, J.W.(2000), "Analysis of Reinforced Concrete Beams Strengthened with FRP Laminates," Journal of Structural Engineering, ASCE, Vol. 126, No. 6, pp. 684-691   DOI   ScienceOn
9 Shah, S.P., Fafitis, A., and Arnold, R.(1983), "Cyclic Loading of Spirally Reinforced Concrete," Journal of Structural Engineering, Vol. 109, No. 7, pp. 1695-1710   DOI   ScienceOn
10 조백순, 김성도(2008), "섬유-강판 복합 플레이트로 보강된RC보의 휨거동에 관한 연구," 한국전산구조공학회 논문집, 제21권, 제5호, pp. 483-491
11 정진환, 김성도, 조백순, 이우철(2003), "탄소섬유시트로 보강된 RC보의 공칭휨모멘트 - II. 해석적 연구," 대한토목학회논문집, 제23권, 제5A호, pp. 931-938