Effective Moment of Inertia Prediction of FRP-Reinforced Concrete Beams Based on Experimental Results
Publication: Journal of Composites for Construction
Volume 16, Issue 5
Abstract
Concrete beams reinforced with glass-fiber reinforced polymer (GFRP) bars exhibit large deflections in comparison with steel-reinforced concrete beams because of the low modulus of elasticity of GFRP bars. This paper proposes new equations for estimating the effective moment of inertia of FRP-reinforced concrete beams on the basis of the genetic algorithm and experimental results. Genetic algorithm is used to optimize the error function between experimental and analytical responses. In the experimental part of the study, nine beam specimens were manufactured and tested. In addition, the results of 55 beam specimens tested by other researchers were also used. The effects of elastic modulus of FRP bars, reinforcement ratio, and the level of loading on the effective moment of inertia are taken into account. The proposed equations are compared with different code provisions and previous models for predicting the deflection of FRP-reinforced concrete beams. The values calculated using the proposed equations are also compared with different test results. The experimental results correlated well with the values predicted using the proposed equations, especially in the cases of high reinforcement ratios and high levels of loading.
Get full access to this article
View all available purchase options and get full access to this article.
References
Abdalla, H. A. (2002). “Evaluation of deflection in concrete members reinforced with fiber reinforced polymer (FRP) bars.” Compos. Struct., 56(1), 63–71.
ACI Committee 318. (2005). “Building Code Requirements for Reinforced Concrete and Commentary.”, American Concrete Institute (ACI), Farmington Hills, Mich.
ACI Committee 440. (2003). “Guide for the design and construction of concrete reinforced with FRP bars.”, American Concrete Institute (ACI), Farmington Hills, Mich.
ACI Committee 440. (2006). “Guide for the Design and Construction of Concrete Reinforced with FRP Bars.”, American Concrete Institute (ACI), Farmington Hills, Mich.
Alsayed, S. H. (1998). “Flexural behavior of concrete beams reinforced with GFRP bars.” Cem. Concr. Compos., 20(1), 1–11.
Alsayed, S. H., Al-Salloum, Y. A., and Almusallam, T. H. (2000). “Performance of fiber reinforced plastic bars as a reinforcing material for concrete structures.” Compos. Part B, 31(6–7), 555–567.
Barris, C., Torres, L., Turon, A., Baena, M., and Catalan, A. (2009). “An experimental study of the flexural behavior of GFRP RC beams and comparison with prediction models.” Compos. Struct., 91(3), 286–295.
Benmokrane, B., Chaallal, O., and Masmoudi, R. (1996). “Flexural response of concrete beams reinforced with FRP reinforcing bar.” ACI Struct. J., 93(1), 46–55.
Bischoff, P. H. (2005). “Reevaluation of deflection prediction for concrete beams reinforced with steel and fiber reinforced polymer bars.” J. Struct. Eng., 131(5), 752–767.
Bischoff, P. H. (2007). “Deflection calculation of FRP reinforced concrete beams based on modifications to the existing Branson equation.” J. Compos. Constr., 11(1), 4–14.
Bischoff, P. H., and Gross, S. P. (2011a). “Design approach for calculating deflection of FRP reinforced concrete.” J. Compos. Constr., 15(4), 490–499.
Bischoff, P. H., and Gross, S. P. (2011b). “Equivalent moment of inertia based on integration of curvature.” J. Compos. Constr., 15(3), 263–273.
Branson, D. E. (1965). “Instantaneous and Time-dependent deflections of simple and continuous reinforced concrete beams.”, Part 1, Alabama Highway Dept., Bureau of Public Roads, AL, (Dept. of Civil Engineering and Auburn Research Foundation, Auburn Univ., Aug. 1963).
Canadian Standard Association (CSA). (2002). “Design and construction of building components with fiber-reinforced polymers.”, CSA, Toronto, Ontario.
Faza, S. S., and Ganga Rao, H. V. S. (1992). “Pre- and post-cracking deflection behavior of concrete beams reinforced by fiber reinforced plastic rebars.” Proc., First International Conference on the Use of Advanced Composite Materials in Bridges and Structures, Canadian Society for Civil Engineering, Montreal, 151–160.
Hall, T. S. (2000). “Deflection of concrete members reinforced with fiber reinforced polymer (FRP) bars.” M.S thesis, Dept. of Civil Engineering, Univ. of Calgary, Calgary, Alberta.
Hall, T., and Ghali, A. (2000). “Long-term deflection prediction of concrete members reinforced with glass fiber reinforced polymer bars.” Can. J. Civil Eng., 27(5), 890–898.
ISIS Canada Corporation. (2001). “Reinforcing concrete structures with fiber reinforced polymers.”, The Canadian Network of Centers of Excellence on Intelligent Sensing for Innovative Structures, Winnipeg, Manitoba, Canada.
Mota, C., Alminar, S., and Svecova, D. (2006). “Critical review of deflection formulas for FRP-RC members.” J. Compos. Constr., 10(3), 183–194.
Newhook, J., Ghali, A., and Tadros, G. (2002). “Cracking and deformability of concrete flexural sections with fiber reinforced polymer.” J. Struct. Eng., 128(9), 1195–1201.
Oh, H., Moon, D. Y., and Zi, G. (2009). “Flexural characteristics of concrete beams reinforced with a new type of GFRP bar.” Polym. Polym. Compos., 17(4), 253–264.
Pecce, M., Manfredi, G., and Cosenza, E. (2000). “Experimental response and code models of GFRP RC beams in bending.” J. Compos. Constr., 4(4), 182–190.
Rafi, M. M., and Nadjai, A. (2009). “Evaluation of ACI 440 deflection model for fiber-reinforced polymer reinforced concrete beams and suggested modification.” ACI Struct. J., 106(6), 762–771.
Rafi, M. M., Nadjai, A., Ali, F., and Talamona, D. (2008). “Aspects of behavior of CFRP reinforced concrete beams in bending.” Constr. Build. Mater., 22, 277–285.
Rasheed, H. A., Nayal, R., and Melhem, H. (2004). “Response prediction of concrete beams reinforced with FRP bars.” Compos. Struct., 65(2), 193–204.
Razaqpur, A. G., Svecova, D., and Cheung, M. S. (2000). “Rational method for calculating deflection of fiber reinforced polymer reinforced beams.” ACI Struct. J., 97(1), 175–184.
Toutanji, H., and Deng, Y. (2003). “Deflection and crack-width prediction of concrete beams reinforced with glass FRP rods.” Constr. Build. Mater., 17, 69–74.
Yost, J. R., Gross, S. P., and Dinehart, D. W. (2003). “Effective moment of inertia for glass fiber-reinforced polymer-reinforced concrete beams.” ACI Struct. J., 100(6), 732–739.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 16 • Issue 5 • October 2012
Pages: 490 - 498
Copyright
© 2012 American Society of Civil Engineers.
History
Received: Jul 20, 2011
Accepted: Jan 31, 2012
Published online: Feb 3, 2012
Published in print: Oct 1, 2012
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.