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http://dx.doi.org/10.5000/EESK.2010.14.1.043

Flexural Behavior of Concrete Beams Reinforced with CFRP rebars  

Lee, Young-Hak (경희대학교 건축공학과)
Won, Dong-Min (경희대학교 건축공학과)
Kim, Min-Sook (경희대학교 건축공학과)
Kim, Hee-Cheul (경희대학교 건축공학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.14, no.1, 2010 , pp. 43-50 More about this Journal
Abstract
To address the problems caused by the corrosion of steel rebar, active research has recently been carried out on members where fiber-reinforced polymer (FRP) is used in place of rebar. As FRP bar is highly brittle and has a low modulus of elasticity, further research is needed on the evaluation of serviceability, in other words on the deflection of flexural concrete members reinforced with FRP rebars. Taking the reinforcement ratio as a variable, this paper analyzes the flexural capacity of concrete beams reinforced with CFRP rebar. The test results of specimens reinforced with CFRP rebar show an increase in stiffness and resisting force along with an increase in the reinforcement ratio. A reinforcement ratio of about 1.3 is needed for the member reinforced with CFRP rebar to show same section property of a steel member. Through a comparison for the value of an effective moment of inertia, the equation suggested by Bischoff & Scanlon predicted values closest to the actual results.
Keywords
CFRP; Beam; Deflection; Reinforcement ratio; Effective moment of inertia;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 ACI Committee 440, Guide for the Design and Construction of Structural Concrete Reinforced with FRP Bars(ACI 440.1R-06), Farmington Hills, Michigan, 2006.
2 이영학, 최준호, 김희철, 김동혁, 나성준, “CFRP 보강근의 부착강도에 대한 실험적 연구,” 대한건축학회논문집 구조계, 제24권, 제 11호, 53-60, 2008년 11월.
3 Bischoff, P. H., “Deflection Calculation of FRP Reinforced Concrete Beams Based on Modifications to the Existing Branson Equation,” Journal of Composites for Construction, V. 11, No. 1, 4-14, 2007.   DOI   ScienceOn
4 Nayal, R., Rasheed, H. A., “Tension Stiffening Model for Concrete Beams Reinforced with Steel and FRP Bars,” Journal of Materials in Civil Engineering, Vol. 18, No. 6, 831-841, 2006.   DOI   ScienceOn
5 Rashid, M.A., Mansur, M.A., and Paramasivam, P., “Behavior of Aramid Fiber-Reinforced Polymer Reinforced High Strength Concrete Beams Under Bending,” Journal of Composites for Construction, V. 9, No. 2, 117-127, 2005   DOI   ScienceOn
6 Rafi, M. M., Nadjai, A., Ali, F., and Talamona, D., “Aspects of behaviour of CFRP reinforced concrete beams in bending,” Construction and Building Materials, 22, 277-285, 2008.   DOI   ScienceOn
7 Scanlon, A., and Bischoff, P. H., “Shrinkage Restraint and Loading History Effects on Deflection of Fiber-Reinforced Polymer Reinforced Beams,”ACI Structural Journal, V.105, No. 4, 498-506, 2008.
8 ACI Committee 435, Control of Deflection in Concrete Structures(ACI 435R-95), Farmington Hills, Michigan, 1995.
9 Benmokrane, B., Chaallal, O., and Masmoudi, R., “Flexural Response of Concrete Beams Reinforced with FRP Reinforcing Bars,” ACI Structural Journal, V. 91, No. 2, 46-55, 1995.
10 Habeeb, M. N., and Ashour, A. F., “Flexural Behavior of Continuous GFRP Reinforced Concrete Beams,” Journal of Composite for Construction, Vol. 12, No. 2, 115-124, 2008   DOI
11 신성우, 안종문, 한범석, 서대원, “FRP 보강근을 주근으로 사용한 콘크리트보의 보강비효과,” 대한건축학회논문집 구조계, 22권, 2호, 19-26, 2006년 2월.
12 ACI Committee 318, Building Code Requirement for Structural Concrete(ACI 318-05), Farmington Hills, Michigan, 2005.
13 Bischoff, P. H., and Scanlon, A., “Effective Moment of Inertia for Calculating Deflections of Concrete Members Containing Steel Reinforcement and Fiber-Reinforced Polymer Reinforcement,” ACI Structural Journal, V. 104, No. 1, 68-75, 2007.