Modes of Failure in Shear Deficient RC T-Beams Strengthened with FRP
Publication: Journal of Composites for Construction
Volume 20, Issue 1
Abstract
The effect of laminate thickness on crack pattern, mode of failure, and strength of shear deficient reinforced concrete (RC) T-beams wrapped with glass fiber reinforced polymer (GFRP) laminates was studied experimentally and numerically. Eight specimens of 2.5 m span, designed to fail in shear, were tested for two point static loading. Displacements, strains, and crack pattern were monitored. The strength and mode of failure were found to depend on the crack pattern. For U wraps, increasing the fiber reinforced polymer (FRP) laminate thickness resulted in reduced web cracking and increased cracking near the free edge of the laminate.
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Acknowledgments
The experiments reported here were performed at the Central Building Research Institute (CBRI), Roorkee. This support is gratefully acknowledged.
References
AASHTO. (2015). “LRFD highway bridge design specifications.” Washington, DC.
Abaqus 6.9 [Computer software]. Waltham, MA, Dassault Systemes Simulia.
ACI (American Concrete Institute). (2008). “Guide for the design and construction of externally bonded FRP system for strengthening concrete structures.” ACI 440.2R-08, Farmington Hills, MI.
Bae, S. W., and Belarbi, A. (2013). “Behavior of various anchorage systems used for shear strengthening of concrete structures with externally bonded FRP sheets.” J. Bridge Eng., 837–847.
Belarbi, A., Bae, S. W., Ayoub, A., Kuchma, D., Mirmiran, A., and Okeil, A. (2011). “Design of FRP systems for strengthening concrete girders in shear.”, Transportation Research Board, Washington, DC.
Bousselham, A., and Chaalal, O. (2004). “Shear strengthening reinforced concrete beams with fiber-reinforced polymer: Assessment of influencing parameters and required research.” ACI Struct. J., 101(2), 219–227.
Bousselham, A., and Chaallal, O. (2006a). “Behaviour of RC T beams strengthened in shear with CFRP: An experimental study.” ACI Struct. J., 103(3), 339–347.
Bousselham, A., and Chaallal, O. (2006b). “Effect of transverse steel and shear span on the performance of RC beams strengthened in shear with CFRP.” Compos. Part B Eng., 37(1), 37–46.
Bousselham, A., and Chaallal, O. (2008). “Mechanism of shear resistance of concrete beams strengthened in shear with externally bonded FRP.” J. Compos. Constr., 499–512.
Chen, J. F., and Teng, J. G. (2003a). “Shear capacity of FRP- strengthened RC beams: FRP debonding.” Constr. Build. Mater., 17(1), 27–41.
Chen, J. F., and Teng, J. G. (2003b). “Shear capacity of fiber reinforced polymer- strengthened reinforced concrete beams: Fiber reinforced polymer rupture.” J. Struct. Eng., 615–625.
Cope, R. J., and Clark, L. A. (1984). Concrete slabs: Analysis and design, Elsevier Applied Science, Barking, Essex, U.K.
Dai, J., Ueda, T., and Sato, Y. (2005). “Development of the nonlinear bond stress-slip model of fiber reinforced plastics sheet-concrete interfaces with a simple method.” J. Compos. Constr., 52–62.
Dai, J. G., and Ueda, T. (2003). “Local bond stress slip relations for FRP sheets concrete interfaces.” Proc., 6th Int. Symp. on FRP Reinforcement for Concrete Structures, World Scientific, Singapore, 143–152.
Dirar, S., Lees, J. M., Morley, C. T. (2013). “Precracked RC T-beams repaired in shear with prestressed CFRP straps.” ACI Struct. J., 110(5), 855–866.
Eligehausen, R., Popov, E. P., and Bertoro, V. V. (1983). “Local bond stress-slip relationship of deformed bars under generalized excitations.”, Earthquake Engineering Centre, Univ. of California, Berkeley, CA, 169.
Hordijk, D. A. (1991). “Local approach to fatigue of concrete.” Ph.D. thesis, Univ. of Technology, Delft, Netherlands.
Khalifa, A., and Nanni, A. (2002). “Rehabilitation of rectangular simply supported RC beams with shear deficiencies using CFRP composites.” Constr. Build. Mater., 16(3), 135–146.
Ozden, S., Atalay, H. M., Akpinar, E., Erdogan, H., and Vulas, Y. Z. (2014). “Shear strengthening of reinforced concrete T-beams with fully or partially bonded fiber- reinforced polymer composites.” Stuct. Concr., 15(2), 229–239.
Panda, K. C. (2010). “Behavior of reinforced concrete T-beams strengthened in shear with glass fiber reinforced polymer.” Ph.D. thesis, IIT, Kharagpur, India.
Rabinovitch, O., and Frostig, Y. (2000). “Closed form high-order analysis of RC beams strengthened with FRP strips.” J. Compos. Constr., 65–74.
Ramberg, W., and Osgood, W. R. (1943). “Description of stress-strain curves by three parameters.” Technical Note No. 902, National Advisory Committee for Aeronautics, Washington, DC.
Teng, J. G., Chen, G. M., Chen, J. F., Rosenboom, O. A., and Lam, L. (2009). “Behavior of RC beams shear strengthened with bonded or unbonded FRP wraps.” J. Compos. Constr., 394–404.
Teng, J. G., Chen, J. F., Smith, S. T., and Lam, L. (2001). “Behavior and strength of FRP strengthened RC structures: A state-of-the-art-review.” Proc. Inst. Civ. Eng. Struct. Build., 156(1), 51–62.
Yuan, H., Teng, J. G., Seracino, R., Wu, Z. S., and Yao, J. (2004). “Full-range behavior of FRP-to-concrete bonded joints.” Eng. Struct., 26(5), 553–565.
Zararis, I. P., Karaveziroglou, M. K., Zararis, P. D. (2006). “Shear strength of reinforced concrete T-beams.” ACI Struct. J., 103(5), 693–700.
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© 2015 American Society of Civil Engineers.
History
Received: Dec 15, 2014
Accepted: Apr 7, 2015
Published online: Jun 12, 2015
Discussion open until: Nov 12, 2015
Published in print: Feb 1, 2016
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