Quasi-Balanced Failure Approach for Evaluating Moment Capacity of FRP Underreinforced Concrete Beams
Publication: Journal of Composites for Construction
Volume 12, Issue 3
Abstract
Failure of concrete beam sections underreinforced with fiber-reinforced polymer (FRP) is initiated by FRP rupture before concrete crushing. In such a case, the typical rectangular stress block based on the balanced failure mechanism may not apply. In the present study, rigorous sectional analyses are performed implementing existing concrete stress-strain models for a wide range of values of design parameters. Based on the results of the numerical analyses, the variation of parameters of equivalent stress block of concrete was investigated, and an alternative, yet simple, design method for evaluating moment-carrying capacity of FRP underreinforced concrete beam using quasi-balanced failure approach was developed. The proposed design method was verified by comparing the predicted moment-carrying capacity with existing test results.
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Acknowledgments
The financial support by the University of New Mexico is greatly appreciated. The writers would also like to thank Scott Horton for his help in the initial studies.
References
ACI Committee. (2005). “Building code requirements for structural concrete and commentary.” ACI 318M-05, American Concrete Institute, Farmington Hills, Mich.
ACI Committee. (2006). “Guide for the design and construction of concrete reinforced with FRP.” ACI 440.1R-06, American Concrete Institute, Farmington Hills, Mich.
Aïtcin, P. C. (1998). High-performance concrete, Routledge, New York.
Brown, V. L., and Bartholomew, C. L. (1993). “FRP reinforcing bars in reinforced concrete members.” ACI Mater. J., 90(1), 34–39.
Carreira, D. J., and Chu, K.-H. (1985). “Stress-strain relationship for plain-concrete in compression.” ACI J., 82(6), 797–804.
Collins, M. P., Mitchell, D., and MacGregor, J. G. (1993). “Structural consideration for high-strength concrete.” Concr. Int., 15(5), 27–34.
Desayi, P., and Krishnan, S. (1964). “Equation for the stress-strain curve of concrete.” ACI J., 61(3), 345–350.
ISIS Canada. (2001). “Reinforcing concrete structures with fibre reinforced polymers.” Intelligent Sensing for Innovative Structures (ISIS) Canada, Network Centers of Excellence, 6.7–6.10.
Loov, R. E. (1991). “A general stress-strain curve for concrete: Implications for high strength concrete columns.” Proc., Annual Conf. of the Canadian Society for Civil Engineering, 302–311.
MacGregor, J. G. (1997). Reinforced concrete: Mechanics and design, Prentice-Hall, Upper Saddle River, N.J.
MathWorks. (2005). MATLAB. The language of technical computing, version, 7.0.4.365, The MathWorks Inc., Natick, Mass.
Matthys, S., and Taerwe, L. (2000). “Concrete slabs reinforced with FRP grids. I: One-way bending.” J. Compos. Constr., 4(3), 145–153.
Nanni, A. (1993). “Flexural behavior and design of reinforced concrete members using FRP reinforcement.” J. Struct. Eng., 119(11), 3344–3359.
Newhook, J., Ghali, A., and Tadros, G. (2002). “Cracking and deformability of concrete flexural sections.” J. Struct. Eng., 128(9), 1195–1201.
Popovics, S. (1970). “A review of stress-strain relationships for concrete.” ACI J., 67(6), 243–248.
Rüsch, H. (1960). “Researches toward a general flexural theory for structural concrete.” ACI J., 57, 1–28.
Thorenfeldt, E., Tomaszewicz, A., and Jensen, J. J., (1987). “Mechanical properties of high-strength concrete and application in design.” Proc., Symp. Utilization of High Strength Concrete, Tapir, Trondheim, 149–159.
Whitney, C. S. (1942). “Plastic theory of reinforced concrete design.” Trans. Am. Soc. Civ. Eng., 107, 251–326.
Yip, W. K. (1998). “Generic form of stress-strain equations for concrete.” Cem. Concr. Res., 28(4), 499–508.
Yost, J. R., Goodspeed, C. H., and Schmeckpeper, E. R. (2001). “Flexural performance of concrete beams reinforced with FRP grids.” J. Compos. Constr., 5(1), 18–25.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 12 • Issue 3 • June 2008
Pages: 236 - 245
Copyright
© 2008 ASCE.
History
Received: Aug 24, 2006
Accepted: May 8, 2007
Published online: Jun 1, 2008
Published in print: Jun 2008
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