Structural Engineering and Mechanics

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Experimental bond behavior of hybrid rods for concrete reinforcement

  • Nanni, Antonio (Department of Architectural Engineering, The Pennsylvania State University) ;
  • Nenninger, Jeremy S. (Department of Architectural Engineering, The Pennsylvania State University) ;
  • Ash, Kenneth D. (BSW) ;
  • Liu, Judy (Department of Architectural Engineering, The Pennsylvania State University)
  • Published : 1997.07.25
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Abstract

Fiber reinforced plastic (FRP) rods provide certain benefits over steel as concrete reinforcement, such as corrosion resistance, magnetic and electrical insulation, light weight, and high strength. FRP composites can be combined with a steel core to form hybrid reinforcing rods that take advantage of properties of both materials. The objective of this study was to characterize the bond behavior of hybrid FRP rods made with braided epoxy-impregnated aramid or poly-vinyl alcohol FRP skins. Eleven rod types were tested using two concrete strengths. Specific topics examined were bond strength, slip, and type of failure in concentric pull-out tests from concrete cubes. From analysis of identical pull-out tests on both hybrid and steel rods, information on relative bond strength and behavior were obtained. It is concluded that strength is similar but slip in hybrid rods is much higher. Hybrid rods failed either by pull-out or splitting the concrete block (with or without yielding of the steel core). Experimental data showed consistency with similar test results presented in the literature.

Keywords

Acknowledgement

Supported by : National Science Foundation

References

  1. ACI Committee 318, (1989), "Building code requirements for reinforced concrete and commentary", America Concrete Institute, Detroite, MI, 347.
  2. ASTM C 24-91a, (1991), "Standard test method for comparing concretes on the basis fo the bond developed with reinforcing steel", American Society for Testing and Materials, Philadelphia, PA, 5.
  3. CEB Task Group IV (1982), "Bond action and bond behavior of reinforcement-state of the art report", Bulletin dInformation No. 151, Comite Euro-International du Beton (CEB), Paris, France, April 1982, 153.
  4. Challal, O. and Benmokrane, B. (1993), "Pull-out and bond of glass fiver rods embedded in concrete and cement grout", RILEM Materials and Structures, 26, 167-175. https://doi.org/10.1007/BF02472934
  5. Chapman, R.A. and Shah, S.P. (1987), "Early-age bond strenght in reinforced concrete", ACI Materials Journal, 84(6), 501-510.
  6. Daniali, S. (1990), "Bond Strength of fiber reinforced plastic bars in concrete", Proc. I Materials Eng. Congress, Denver, CO, American Socirety of Civil Engineers, New York, NY, 1182-1191.
  7. FIP Commission on Prestressing Materials and Systems-Working Group on FRP (1992), "High-strength fiber composite tensile elements for structural concrete", Final Version of the State-of-the-Art Report, Federation Internationale de la Precontrainte, London, UK, 140
  8. Gangarao, H.V.S. and Faza, S.S. (1991), "Bending and bond behavior and design of concrete beams reinforced with FRP reinforcing bars", FHWA-WV DOH Report, Dept. of Civil Eng., Univ. of West Virginia, Morgantown, WV, 200
  9. Gerritse, A. (1990), "Applications and design criteria for aramid fibrous tensile elements", Proc., Composite Materials in Building: State-of-the-Art, Research, and Prospects, Consiglio Naionale Ricerche, Milan, Italy, 317-333.
  10. Iyer, S.L. and Anigol, M. (1991), "Testing and evaluating fiberglass, graphite and steel prestressing cables for pretensioned beams", Proc., Advanced Composites Materials in Civil Engineering Structures. ASCE Specialty Conference, Las Vegas, NE, American Society of Civil Engineers, New York, NY, 44-56.
  11. Johnston, D.S. and Zia, P. (1982), "Bond characteristics of epoxy coated reinforcing bars", Report No. FHWA/NC/82-002, Department of Civil Engineering, North Carolina State University, Raleigh, NC, 163.
  12. Larralde, J. and Silva-Rodriguez, R. (1993), "Bond and slip of FRP reinforcing bars in concrete", Journal of Materials in Civil Engineering, ASCE, 5(1), 30-40. https://doi.org/10.1061/(ASCE)0899-1561(1993)5:1(30)
  13. Lutz, L.A. and Gergely, P. (1967), "Mechanics of bond and slip of deformed bars in concrete", ACI Journal, Proceedings, 64(11), 711-721.
  14. Maruyama, T. (1990), "Experimental reaearch into the use of carbon fiber-reinforced-plastic rods for concrete reinforcement", Doctoral Thesis, University of Tokyo, Tokyo, Japan, 207.
  15. Nanni, A., Henneke, M.J. and Okamoto, T. (1994), "Tensile properties of hybrid rods for concrete reinforcement", Construction and Building Materials, 8(1), 27-34. https://doi.org/10.1016/0950-0618(94)90005-1
  16. Nanni, A., Henneke, M.J. and Okamoto, T. (1994a), "Behavior of concrete beams with hybrid reinforcement", Construction and Building Materials, 8(2), 89-95. https://doi.org/10.1016/S0950-0618(09)90017-4
  17. Nanni, A., Okamoto, T., Tanigaki, T. and Henneke, M. (1992), "Hybrid (FRP+Steel) reinforcement for concrete structures", Proc., ASCE Materials Engineering Congress, Atlanta, GA, American Society of Civil Engineers, New York, NY., 655-663.
  18. Nanni, A. and Liu, J. (1997), "Modeling of bond behavior of hybrid rods for concrete reinforcement", Structural Engineering and Mechanics, An Int'l Journal, 5, 355-368. https://doi.org/10.12989/sem.1997.5.4.355
  19. Pleimann, L.G. (1991), "Strength, modulus of elasticity, and bond of deformed FRP rods", Proc., Advanced Composites Materials in Civil Engineering Structures, ASCE Specialty Conference, Las Vegas, NE, American Society of Civil Engineers, New York, NY, 99-110.
  20. Soroushian, P., Choi, K.B., Park, G.H. and Aslani, F. (1991), "Bond of deformed bars to concrete: effects of confinement and strength of concrete", ACI Materials J., 88(3), 227-232.
  21. Tanigaki, M. (1991), "Flexural behavior of concrete beams reinforced with high strength fiber rods", Doctoral Thesis, Waseda University, Tokyo, Japan, 124.
  22. Tao, S., Ehsani, M.R. and Saadatmanesh, H. (1992), "Bond strength of straight GFRP reinforcing bars", Proc., ASCE Materials Engineering Congress, Atlanta, American Society of Civil Engineers, New York, NY., 598-605.
  23. Treece, R.A. and Jirsa, J.O. (1989), "Bond strength of epoxy-coated reinforcing bars", ACI Materials Journal, 86(2), 167-174.

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