Bond Durability of Glass Fiber-Reinforced Polymer Bars Embedded in Concrete Beams
Publication: Journal of Composites for Construction
Volume 11, Issue 3
Abstract
An experimental and analytical investigation of bond durability of E-glass fiber-reinforced polymer reinforcement bars in concrete beams is presented. Beams were conditioned with sustained flexural loads in indoor, outdoor, alkaline solution, or freeze/thaw environments for up to , after which they were subjected to eccentric three-point flexure tests to evaluate bond. Experimental bar force and slip were used to draw direct conclusions on bond durability, and also to calibrate a proposed local bond–slip model that incorporates concrete cover splitting. Experimental bar force at the onset of free-end slip varied little after any of the conditionings, although the characteristic of bond failure was noted to be less ductile in the moister environments. The interfacial fracture energy associated with bond–slip did not change with conditioning time in any of the environments except freeze/thaw, where a monotonic reduction versus time was seen. The effective bond length of the bar under various conditionings varied roughly in proportion to the local slip at complete local bond failure.
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Acknowledgments
This research was supported by the National Science Foundation under Grant Nos. 0219484 and 9908934. Hughes Brothers of Seward, Nebraska provided the GFRP bars. Many thanks are extended Mr. Doug Gremel of Hughes Brothers for his interest in and support of this investigation, to Professor Abhijit Mukherjee of the Department of Civil Engineering at the Indian Institute of Technology, Bombay, who partnered with the writers in a related investigation in India, and to Penn State students Jeremy D. Mostoller, Ralph G. Giernacky, Marcus Whitaker, and Jenevene A. Duenas for acquiring the raw data used in this investigation.
References
ACI Committee 440. (2003). “Guide for the design and construction of concrete reinforced with FRP bars.” ACI 440.1R-03, American Concrete Institute, Farmington Hills, Mich.
ACI Committee 440. (2004). “Guide test methods for fiber-reinforced polymers (FRPs) for reinforcing or strengthening concrete structures.” ACI 440.3R-04, Section B3, American Concrete Institute, Farmington Hills, Mich.
Al-Dulaijan, S. U. (1996). “Effect of environmental and mechanical conditioning on bond between FRP reinforcement and concrete.” Ph.D. thesis, The Pennsylvania State Univ., University Park, Pa.
Al-Zahrani, M. M., Al-Dulaijan, S. U., Nanni, A., Bakis, C. E., and Boothby, T. E. (1999). “Evaluation of bond using FRP rods with axisymmetric deformations.” Constr. Build. Mater., 13(6), 299–309.
ASTM E 1545-00. (2004). “Standard test method for assignment of the glass transition temperature by thermomechanical analysis.” Annual book of ASTM standards, ASTM, Vol. 14.02, West Conshohocken, Pa.
Bakis, C. E., Boothby, T. E., Schaut, R. A., and Pantano, C. G. (2005). “Tensile strength of GFRP bars under sustained loading in concrete beams.” Proc., 7th Int. Symp., Nonmetallic Fiber Reinforced Polymer Composite Reinforcement for Concrete Structures, FRPRCS-7, C. K. Shield, J. P. Busel, S. L. Walkup, and D. D. Gremel, eds., Vol. 2, SP-230, American Concrete Institute, Farmington Hills, Mich., 1429–1446.
Bakis, C. E., Freimanis, A. J., Gremel, D., and Nanni, A. (1998b). “Effect of resin material on bond and tensile properties of unconditioned and conditioned FRP reinforcement rods.” Proc., Durability of Fibre Reinforced Polymer (FRP) Composites for Construction, CDCC’98, B. Benmokrane and H. Rahman, eds., Univ. of Sherbrooke, Quebec, 525–535.
Bakis, C. E., Uppuluri, V. S., Nanni, A., and Boothby, T. E. (1998a). “Analysis of bonding mechanisms in smooth and lugged FRP rods embedded in concrete.” Compos. Sci. Technol., 58(8), 1307–1319.
Bank, L. C., Puterman, M., and Katz, A. (1998). “The effect of material degradation on bond properties of fiber reinforced plastic reinforcing bars in concrete.” ACI Mater. J., 95(3), 232–243.
Benmokrane, B., Tighiouart, B., and Chaallal, O. (1996). “Bond strength and load distribution of composite GFRP reinforced bars in concrete.” ACI Mater. J., 93(3), 246–253.
Bradberry, T. E., and Wallace, S. (2003). “FRP reinforced concrete in Texas transportation—Past, present, and future.” Proc., Field Applications of FRP Reinforcement: Case Studies, S. Rizkalla and A. Nanni, eds., SP215, American Concrete Institute, Farmington Hills, Mich., 3–20.
Carino, N. J., and Lew, H. S. (1982). “Reexamination of the relation between splitting tensile and compressive strength of normal weight concrete.” ACI J., 79(3), 214–218.
Conrad, J. O., Bakis, C. E., Boothby, T. E., and Nanni, A. (1998). “Durability of bond of various FRP rods in concrete.” Proc., Durability of Fibre Reinforced Polymer (FRP) Composites for Construction, CDCC’98, B. Benmokrane and H. Rahman, eds., Univ. of Sherbrooke, Quebec, 299–310.
Cosenza, E., Manfredi, G., and Realfonzo, R. (1997). “Behavior and modeling of bond of FRP rebars to concrete.” J. Compos. Constr., 1(2), 40–51.
Devalapura, R. K., Greenwood, M. E., Gauchel, J. V., and Humphrey, T. J. (1998). “Evaluation of GFRP performance using accelerated test methods.” Proc., Durability of Fibre Reinforced Polymer (FRP) Composites for Construction, CDCC’98, B. Benmokrane and H. Rahman, eds., Univ. of Sherbrooke, Quebec, 107–116.
Eligehausen, R., Popov, E. P., and Bertero, V. V. (1983). “Local bond stress-slip relationships of deformed bars under generalized excitations.” Rep. No. UCB/EERC-83/23, Earthquake Engineering Research Center, Univ. of California, Berkeley.
El-Salakawy, E., Benmokrane, B., El-Ragaby, A., and Nadeau, D. (2005). “Field investigation on the first bridge deck slab reinforced with glass FRP bars constructed in Canada.” J. Compos. Constr., 9(6), 470–479.
Focacci, F., Nanni, A., and Bakis, C. E. (2000). “Local bond-slip relationship for FRP reinforcement in concrete.” J. Compos. Constr., 4(1), 24–31.
Freimanis, A. J. (1997). “Tensile and bond behavior of FRP reinforcement rods.” BS thesis, Dept. of Engineering Science and Mechanics, The Pennsylvania State Univ., University Park, Pa.
Giernacky, R. (2002). “Evaluation of concrete beams reinforced with internal GFRP bars: A long-term durability study.” BS thesis, Dept. of Engineering Science and Mechanics, The Pennsylvania State Univ., University Park, Pa.
Guo, J., and Cox, J. V. (2000). “Interface model for the mechanical interaction between FRP bars and concrete.” J. Reinf. Plast. Compos., 19(1), 15–33.
Hughes Brothers. (1999). Product guide specification: Glass fiber reinforced polymer (GFRP) bars for concrete reinforcement, Seward, Neb.
Japan Society of Civil Engineers (JSCE). (1997). “Test method for bond strength of continuous fiber reinforcing materials by pull-out testing.” Recommendation for design and construction of concrete structures using continuous fiber reinforcing materials, JSCE-E 539–1995, Concrete Engineering Series No. 23, Japan Society of Civil Engineers, Tokyo, 120-124.
Krishnaswamy, R., and Lopez, M. M. (2006). “Time performance of concrete-CFRP bond under the effects of freeze-thaw cycles and sustained loading.” Proc., 85th Annual Meeting, Transportation Research Board (CD-ROM), National Academies, Washington, D.C.
Lin, T. Y., and Burns, N. H. (1997). Design of prestressed concrete structures, 3rd Ed., Wiley, New York, 156–161.
Malvar, L. J., Cox, J. V., and Bergeron, C. K. (2003). “Bond between carbon fiber reinforced polymer bars and concrete. I: Experimental study.” J. Compos. Constr., 7(2), 154–163.
Mostoller, J. (2001). “Bond strength of E-glass FRP embedded in concrete beams.” BS thesis, Dept. of Engineering Science and Mechanics, The Pennsylvania State Univ., University Park, Pa.
Nanni, A., and Liu, J. (1997). “Modeling of bond behavior of hybrid rods for concrete reinforcement.” Struct. Eng. Mech., 5(4), 355–368.
National Climactic Data Center. (NCDC). (2001). “Daily normals of temperature, precipitation, and heating and cooling degree days, 1971–2000.” Climatography of the United States No. 84, National Climatic Data Center, NESDIS/NOAA, Asheville, N.C.
Pecce, M., Manfredi, G., Realfonzo, R., and Cosenza, E. (2001). “Experimental and analytical evaluation of bond properties of GFRP bars.” J. Mater. Civ. Eng., 13(4), 282–290.
Porter, M. L., and Barnes, B. A. (1998). “Accelerated durability of FRP reinforcement for concrete structures.” Proc., Durability of Fibre Reinforced Polymer (FRP) Composites for Construction, CDCC’98, B. Benmokrane and H. Rahman, eds., Univ. of Sherbrooke, Quebec, 191–201.
Press, W. H., Flannery, B. P., Teukolsky, S. A., and Vetterling, W. T. (1986). Numerical recipes, Cambridge University Press, Cambridge, U.K.
RILEM. (1994). “Bond test for reinforcement steel. 1. Beam test.” RC 5, RILEM technical recommendations for the testing and use of construction materials, Part, 4, E & FN Spon, London.
Sakai, T., Kanakubo, T., Yonemaru, K., and Fukuyama, H. (1997). “Bond splitting behavior of continuous fiber reinforced concrete members.” Proc., 4th Int. Symp., Fiber Reinforced Polymer Reinforcement for Reinforced Concrete Structures, SP-188, C. W. Dolan, S. H. Rizkalla, and A. Nanni, eds., American Concrete Institute, Farmington Hills, Mich., 1131–1144.
Shield, C., French, C., and Retika, A. (1997). “Thermal and mechanical fatigue effects on GFRP rebar-concrete bond.” Proc., Nonmetallic (FRP) Reinforcement for Concrete Structures, FRPRCS-3, Vol. 2, Japan Concrete Institute, Tokyo, 381–388.
Tepfers, R. (1979). “Cracking of concrete cover along anchored deformed reinforcing bars.” Mag. Concrete Res., 31(106), 3–12.
Tepfers, R., Hedlund, G., and Rosinski, B. (1998). “Pull-out and tensile reinforcement splice tests with GFRP bars.” Proc., 2nd Int. Conf. on Composites in Infrastructure, ICCI-2, Vol. 2, Univ. of Arizona, Tucson, Ariz., 37–51.
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Information
Published In
Journal of Composites for Construction
Volume 11 • Issue 3 • June 2007
Pages: 269 - 278
Copyright
© 2007 ASCE.
History
Received: Jun 14, 2005
Accepted: May 23, 2006
Published online: Jun 1, 2007
Published in print: Jun 2007
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