A Recalibration of the Crack Width Bond-Dependent Coefficient for GFRP-Reinforced Concrete
Publication: Journal of Composites for Construction
Volume 23, Issue 4
Abstract
Serviceability requirements can often control the design of glass fiber–reinforced polymer (GFRP)-reinforced concrete flexural members due to the lower stiffness of GFRP than of steel. ACI Committee 440 crack control provisions for GFRP-reinforced concrete mimic those from ACI 318 for steel-reinforced concrete, but with the addition of a bond-dependent coefficient, , to account for differences in bond between GFRP and concrete from steel and concrete. The recommended value for the bond-dependent coefficient in ACI 440.1R-15 is 1.4. This value is largely based on one experimental study, with one type of GFRP bar. Since that study, many more experiments have been performed to examine crack widths in GFRP-reinforced concrete. A database of these experiments that satisfy a rigorous set of criteria to ensure valid experimental results was created from the literature and used to recalibrate the bond-dependent coefficient. A value of 1.2 is recommended for all bars that include a sand coating in the surface enhancement. A value of 1.4 is recommended for all other bars.
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References
ACI (American Concrete Institute). 2001. Guide for the design and construction of concrete reinforced with FRP bars. ACI 440.1R. Farmington Hills, MI: ACI.
ACI (American Concrete Institute). 2003. Guide for the design and construction of concrete reinforced with FRP bars. ACI 440.1R. Farmington Hills, MI: ACI.
ACI (American Concrete Institute). 2006. Guide for the design and construction of structural concrete reinforced with FRP bars. ACI 440.1R. Farmington Hills, MI: ACI.
ACI (American Concrete Institute). 2014. Building code requirements for structural concrete and commentary. ACI 318. Farmington Hills, MI: ACI.
ACI (American Concrete Institute). 2015. Guide for the design and construction of structural concrete reinforced with fiber-reinforced polymer (FRP) bars. ACI 440.1R. Farmington Hills, MI: ACI.
ACI-ASCE Committee 426. 1973. “The shear strength of reinforced concrete members.” J. Struct. Div. 99 (ST6): 1091–1187.
ASTM. 2017. Standard specification for solid round glass fiber reinforced polymer bars for concrete reinforcement. ASTM D7957/D7957M. West Conshohocken, PA: ASTM.
Bakis, C., C. Ospina, T. Bradberry, B. Benmokrane, S. Gross, J. Newhook, and G. Thiagarajan. 2006. “Evaluation of crack widths in concrete flexural members reinforced with FRP bars.” In Proc., 3rd Int. Conf. on FRP Composites in Civil Engineering (CICE 2006), edited by A. Mirmiran and A. Nanni, 307–310. Miami: Florida International Univ.
Carpenter, J. E., and N. W. Hanson. 1969. “Tests of reinforced concrete wall beams with large web openings.” ACI J. 66 (9): 756–766.
Frosch, R. J. 1999. “Another look at cracking and crack control in reinforced concrete.” ACI Struct. J. 96 (3): 437–442.
Gao, D., B. Benmokrane, and R. Masmoudi. 1998. A calculating method of flexural properties of FRP-reinforced concrete beam. Part 1: Crack width and deflection. Sherbrooke, Canada: Dept. of Civil Engineering, Univ. of Sherbrooke.
Gergely, P., and L. A. Lutz. 1968. Maximum crack width in reinforced concrete flexural members. ACI SP-20. Farmington Hills, MI: ACI.
Giernacky, R. G. 2002. “Durability of E-glass FRP reinforced concrete beams.” B.S. thesis, Dept. of Engineering Science and Mechanics, Penn State Univ.
Gross, S. P., J. R. Yost, and D. Stefanski. 2009. “Effect of sustained loads on flexural crack width in concrete members reinforced with internal FRP reinforcement.” In Serviceability of concrete members reinforced with internal/external FRP reinforcement: ACI Special Publication SP-264, 13–32. Detroit, MI: American Concrete Institute.
Kassem, C. 2004. “Cracking and load-deflection behaviour of one-way concrete elements reinforced with FRP bars under flexure.” [In French.] Ph.D. thesis, Dept. of Civil Engineering, Université de Sherbrooke.
Kassem, C., A. Farghaly, and B. Benmokrane. 2011. “Evaluation of flexural behavior and serviceability performance of concrete beams reinforced with FRP bars.” J. Compos. Constr. 15 (5): 682–695. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000216.
Masmoudi, R., M. Thériault, and B. Benmokrane. 1998. “Flexural behavior of concrete beams reinforced with deformed fiber reinforced plastic reinforcing rods.” ACI Struct. J. 95 (6): 665–675.
McCallum, B. 2013. “Experimental evaluation of the bond dependent coefficient and parameters which influence crack width in GFRP reinforced concrete.” M.S. thesis, Dept. of Civil and Resource Engineering, Dalhousie Univ.
Morcous, G., and E. Henin. 2011. Determining the bond-dependent coefficient of glass fiber-reinforced polymer (GFRP) bars. Lincoln, NE: Dept. of Civil Engineering, Univ. of Nebraska.
El-Nemr, A., E. Ahmed, C. Barris, and B. Benmokrane. 2016. “Bond-dependent coefficient of glass and carbon FRP bars in normal and high strength concretes.” J. Const. Build. Mater. 113 (1): 77–89. https://doi.org/10.1016/j.conbuildmat.2016.03.005.
El-Nemr, A., E. Ahmed, and B. Benmokrane. 2013. “Flexural behavior and serviceability of normal- and high- strength concrete beams reinforced with glass fiber-reinforced polymer bars.” ACI Struct. J. 110 (6): 1077–1088.
El-Nemr, A., E. Ahmed, A. El-Safty, and B. Benmokrane. 2018. “Evaluation of the flexural strength and serviceability of concrete beams reinforced with different types of GFRP bars.” Eng. Struct. 173: 606–619. https://doi.org/10.1016/j.engstruct.2018.06.089.
Newhook, J. P. 2000. “The use of fibre reinforced concrete to reduce crack widths in GFRP reinforced concrete beams.” In Proc., 3rd Int. Conf. Advanced Composite Materials in Bridges and Structures, ACMBS III, edited by J. L. Humar and A. G. Razaqpur, 145–152. Montreal: Canadian Society Civil Engineering.
Ospina, C., and C. Bakis. 2007. “Indirect flexural crack control of concrete beams and one-way slabs reinforced with FRP bars.” In Proc., 8th Int. Symp. on Fiber Reinforced Polymer Reinforcement for Concrete Structures (FRPRCS-8), edited by T. C. Triantafilloued. Patras, Greece: Univ. of Patras.
Razaqpur, A. G., and S. Spadea. 2015. “Shear strength of FRP reinforced concrete members with stirrups.” J. Compos. Constr. 19 (1): 04014025. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000483.
El-Salakawy, E. F., and B. Benmokrane. 2004. “Serviceability of concrete bridge deck slabs reinforced with FRP composite bars.” ACI Struct. J. 101 (5): 727–736.
Theisz, P. 2004. “Properties of high performance concrete beams reinforced with carbon fiber reinforced polymer bars.” M.S. thesis, Dept. of Civil Engineering, Villanova Univ.
Thériault, M., and B. Benmokrane. 1998. “Effects of FRP reinforcement ratio and concrete strength on flexural behavior of concrete beams.” J. Compos. Constr. 2 (1): 7–16. https://doi.org/10.1061/(ASCE)1090-0268(1998)2:1(7).
Thiagarajan, G. 2003. “Experimental and analytical behavior of carbon fiber-based rods as flexural reinforcement.” J. Comp. Constr. 7 (1): 64–72. https://doi.org/10.1061/(ASCE)1090-0268(2003)7:1(64).
Trejo, D., F. Aguíñiga, R. L. Yuan, R. W. James, and P. B. Keating. 2005. Characterization of design parameters for fiber reinforced polymer composite reinforced concrete systems. College Station, TX: Texas Transportation Institute, Texas A&M Univ.
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Published In
Journal of Composites for Construction
Volume 23 • Issue 4 • August 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Oct 16, 2018
Accepted: Apr 11, 2019
Published online: Apr 25, 2019
Published in print: Aug 1, 2019
Discussion open until: Sep 25, 2019
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