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http://dx.doi.org/10.12652/Ksce.2010.30.6A.495

Nonlinear Analysis of Concrete Girders Strengthened with Unboded Prestressed CFRP Plates  

Choi, Kyu-Chon ((주)한화건설 토목기술팀)
Lee, Jae Seok (충북대학교 토목공학부)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.30, no.6A, 2010 , pp. 495-502 More about this Journal
Abstract
A study for the nonlinear analysis method of flexural behavior of concrete girders strengthened with unbonded prestressed CFRP plates is presented. The concrete girders strengthened with unbonded prestressed CFRP plates exhibit more complex nonlinear behavior due to the slip between the concrete girder and the CFRP plates than the case of bonded CFRP plates. The unbonded CFRP plate is modeled as an assemblage of the curved elements both ends of which are rigidly linked to the nodes of fibered frame elements. The slip effect of the unbonded CFRP plate is taken into account using the force equilibrium relationship at each node. To evaluate the validity and the capability of the proposed analysis method, the ultimate analysis results of the concrete beams strengthened with unbonded prestressed CFRP plate are compared with the experimental results obtained from other investigators. The proposed analysis method is found to predict ultimate behaviors of these beams fairly well. Additionally the time-dependent deformations of the concrete beam seems to have little influence on the ultimate behaviors of concrete beams strengthened with unbonded prestressed CFRP plate, and the cracks of the concrete beam which occurred before strengthening it with CFRP plate are found to have almost no influence on the ultimate capacity of the beam.
Keywords
unbonded prestressed CFRP plate; slip; fiber frame element; concrete girder; nonlinear analysis; ultimate analysis;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 박재현, 홍성남, 박선규, 정우태, 박종섭, 박영환(2005) 프리스트레스를 도입한 표면매립 FRP 보강보의 휨 거동. 한국콘크리트학회 2005년도 가을 학술발표회 논문집, 한국콘크리트학회, pp. 157-160.
2 심종성, 오홍섭, 박철우, 문도영 (2005) 철근콘크리트 T형 교량 재하시험을 통한 FRP 외부부착공법의 보강성능 검토. 대한토목학회논문집, 대한토목학회, 제25권, 제1A호, pp. 143-151.
3 양동석, 박준명, 유영찬, 박선규(2007) 프리스트레스트 탄소섬유판으로 보강된 철근콘크리트 보의 휨 거동 및 해석. 한국콘크리트학회논문집, 한국콘크리트학회, 제19권, 제4호, pp. 467-474.   과학기술학회마을
4 유영찬, 최기선, 박영환, 박종섭, 김긍환(2006) 외부 프리스트레스트 탄소섬유판 정착장치의 콘크리트에 대한 정착성능. 한국콘크리트학회 2006년도 봄 학술발표회 논문집, 한국콘크리트학회, pp. 226-229.
5 이재석, 최규천(2005) 3차원 프리스트레스트 콘크리트 뼈대의 비선형 해석. 대한토목학회논문집, 대한토목학회, 제25권, 제1A호, pp. 163-172.
6 한상훈, 홍기남, 김형진, 우상균(2006) CFRP 판으로 프리스트레싱 보강한 RC 보의 휨거동에 관한 실험적 연구", 대한토목학회논문집, 대한토목학회, 제26권, 제2A호, pp. 301-310.
7 홍성남, 박준명, 박선규, 박종섭, 박영환(2006) 프리스트레스를 도입한 FRP 표면매립 보강보의 휨거동에 관한 실험적 연구. 한국콘크리트학회논문집, 한국콘크리트학회, 제18권, 제6호, pp. 737-742.   과학기술학회마을
8 ACI Committee 209 (2002) Prediction of Creep, Shrinkage and Temperature Effects in Concrete Structures. ACl Manual of Concrete Practice, American Concrete Institute.
9 Rabinovitch, O. and Frostig, Y. (2003) Experiments and analytical comparison of RC beams strengthened with CFRP composites. Composites Part B: engineering, Vol. 34, pp. 663-677.   DOI   ScienceOn
10 Wu, Z. and Yin, J. (2003) Fracturing behaviors of FRP-strengthened concrete structures", Engineering Fracture Mechanics, Vol. 70, pp. 1339-1355.   DOI   ScienceOn
11 Smith, S.T. and Teng, J.G. (2002) FRP-strengthened RC Beams. I: review of debonding strength models. Engineering Structures, Vol. 24, pp. 385-395.   DOI   ScienceOn