Experimental and Numerical Evaluation of the Shear Behavior of Reinforced Concrete T-Beams with Hybrid Steel-FRP Stirrups
Publication: Journal of Composites for Construction
Volume 21, Issue 4
Abstract
This study presents the shear behavior of reinforced concrete (RC) T-beams with innovative steel stirrups hybridized in the longitudinal direction with a fiber-reinforced polymer (FRP) composite. Six beams were experimentally tested: three beams were reinforced with the hybrid steel-FRP stirrups, and the others served as control samples and were reinforced with conventional steel stirrups. Furthermore, a two-dimensional finite-element (FE) model was created and executed using FE analysis software to examine the effect of several influential parameters, including the type and amount of FRP used in producing the hybrid stirrups. Large-scale beams reinforced with carbon FRP (CFRP) stirrups were numerically simulated before and after replacing the transverse CFRP reinforcement with steel-FRP stirrups. Compared with conventional RC beams, concrete beams reinforced with steel-FRP stirrups successfully showed a considerable increase in the beam shear strength and deformability. Moreover, hybrid steel-FRP stirrups can provide design engineers with a new, flexible design to control both the structural response and the construction cost.
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References
ACI (American Concrete Institute). (2006). “Guide for the design and construction of concrete reinforced with FRP bars.”, Detroit, MI.
ACI (American Concrete Institute). (2011). “Building code requirements for structural concrete (ACI 318-11) and commentary.”, Farmington Hills, MI.
Ahmed, E. A., El-Salakawy, E. F., and Benmokrane, B. (2010). “Shear performance of RC bridge girders reinforced with carbon FRP stirrups.” J. Bridge Eng., 44–54.
Bentz, E., Massam, L., and Collins, M. (2010). “Shear strength of large concrete members with FRP reinforcement.” J. Compos. Constr., 637–646.
CSA (Canadian Standards Association). (2006). “Canadian highway bridge design code.” CAN/CSA-S6-06, Mississauga, ON, Canada.
CSA (Canadian Standards Association). (2012). “Design and construction of building components with fiber-reinforced polymers.” CAN/CSA S806, Mississauga, ON, Canada.
Deifalla, A., Hamed, M., Saleh, A., and Ali, T. (2014). “Exploring GFRP bars as reinforcement for rectangular and L-shaped beams subjected to significant torsion: An experimental study.” Eng. Struct., 59, 776–786.
DIANA [Computer software]. TNO DIANA BV, Delft, Netherlands.
El-Mogy, M., El-Ragaby, A., and El-Salakawy, E. (2011). “Effect of transverse reinforcement on the flexural behavior of continuous concrete beams reinforced with FRP.” J. Compos. Constr., 672–681.
El-Mogy, M., El-Ragaby, A., and El-Salakawy, E. (2013). “Experimental testing and finite element modeling on continuous concrete beams reinforced with fibre reinforced polymer bars and stirrups 1.” Can. J. Civ. Eng., 40(11), 1091–1102.
El-Sayed, A., El-Salakawy, E., and Benmokrane, B. (2007). “Mechanical and structural characterization of new carbon FRP stirrups for concrete members.” J. Compos. Constr., 352–362.
Etman, E. (2011). “Innovative hybrid reinforcement for flexural members.” J. Compos. Constr., 2–8.
Fahmy, M. F., Wu, Z., Wu, G., and Sun, Z. (2010). “Post-yield stiffnesses and residual deformations of RC bridge columns reinforced with ordinary rebars and steel fiber composite bars.” Eng. Struct., 32(9), 2969–2983.
Feenstra, P. H. (1993). “Computational aspects of biaxial stress in plain and reinforced concrete.” Delft Univ. of Technology, Delft, Netherlands.
Ibrahim, A. M., Fahmy, M. F., and Wu Z. (2016). “3D finite element modeling of bond-controlled behavior of steel and basalt FRP-reinforced concrete square bridge columns under lateral loading.” J. Compos. Struct., 143, 33–52.
Lee, C., Jeong, S. M., and Park, J. W. (2009). “Use of fibre sheet strip stirrups for internal shear reinforcement of concrete beams.” Mag. Concr. Res., 61(9), 731–743.
MacGregor, J. G., and Wight, J. K. (2011). Reinforced concrete: Mechanics & design, Prentice Hall, Upper Saddle River, NJ.
Mahmoud, K. and El-Salakawy, E. (2013). “Shear strength of GFRP-reinforced concrete continuous beams with minimum transverse reinforcement.” J. Compos. Constr., .
Shehata, E., Morphy, R., and Rizkalla, S. (2000). “Fibre reinforced polymer shear reinforcement for concrete members: Behaviour and design guidelines.” Can. J. Civ. Eng., 27(5), 859–872.
Sun, Z. Y., Yang, Y., Qin, W. H., Ren, S. T., and Wu, G. (2012). “Experimental study on flexural behavior of concrete beams reinforced by steel-fiber reinforced polymer composite bars.” J. Reinf. Plast. Compos., 31(24), 1737–1745.
Tomlinson, D., and Fam, A. (2014). “Performance of concrete beams reinforced with basalt FRP for flexure and shear.” J. Compos. Constr., .
Uriayer, F. A. J., and Abbas, F. (2012). “The new steel-CFRP composite specimen (CFRP laminates sandwiched between two steel strips) and its behaviour under uniaxial tension.” Int. J. Civ. Struct. Eng., 3(1), 249–258.
Uriayer, F. A. J., and Alam, M. (2013). “Steel-CFRP composite (CFRP laminate sandwiched between mild steel strips) and its behavior as stirrup in beams.” Proc., World Academy of Science, Engineering and Technology, World Academy of Science, Engineering and Technology (WASET), Çanakkale, Turkey.
Vecchio, F., and Selby, R. (1991). “Toward compression-field analysis of reinforced concrete solids.” J. Struct. Eng., 1740–1758.
Wu, G., Wu, Z., Luo, Y., Sun, Z., and Hu, X. (2010). “Mechanical properties of steel-FRP composite bar under uniaxial and cyclic tensile loads.” J. Mater. Civ. Eng., 1056–1066.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 21 • Issue 4 • August 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: May 9, 2016
Accepted: Oct 25, 2016
Published online: Feb 2, 2017
Discussion open until: Jul 2, 2017
Published in print: Aug 1, 2017
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