DOI QR코드

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Bond strength of reinforcement in splices in beams

  • Turk, Kazim (Firat University, Civil Engineering Department) ;
  • Yildirim, M. Sukru (Trakya University, Corlu Engineering Faculty, Civil Engineering Department)
  • 투고 : 2003.01.14
  • 심사 : 2003.07.19
  • 발행 : 2003.10.25

초록

The primary aim of this study was to investigate the bond strength between reinforcement and concrete. Large sized nine beams, which were produced from concrete with approximately ${f_c}^{\prime}=30$ MPa, were tested. Each beam was designed to include two bars in tension, spliced at the center of the span. The splice length was selected so that bars would fail in bond, splitting the concrete cover in the splice region, before reaching the yield point. In all experiments, the variable used was the reinforcing bar diameter. In the experiments, beam specimens were loaded in positive bending with the splice in a constant moment region. In consequence, as the bar diameter increased, bond strength and ductility reduced but, however, the stiffnesses of the beams (resistance to deflection) increased. Morever, a empirical equation was obtained to calculate the bond strength of reinforcement and this equation was compared with Orangun et al. (1977) and Esfahani and Rangan (1998). There was a good agreement between the values computed from the predictive equation and those computed from equations of Orangun et al. (1977) and Esfahani and Rangan (1998).

키워드

참고문헌

  1. De Larrard, F., Scahaller, I. and Fuchs, J. (1993), "Effect of bar diameter on the bond strength of passive reinforcement in high-performance concrete", ACI Mater. J., 93, 333-339.
  2. Esfahani, M.R. and Rangan, B.V. (1998), "Bond between normal strength and high-strength concrete and reinforcing bars in splices in beams", ACI Struct. J., 98, 272-280.
  3. Gambarova, G.P. and Giuriani, E. (1985), Discussion of "Fracture mechanics of bond in reinforced concrete" by Ingraffea, A.R., Gerstle, W.H., Gergely, P. and Saouma, V., J. Struct. Eng., ASCE, 1161-1163.
  4. Hamad, B.S. (1995), "Comparative bond strength of coated and uncoated bars with different rib geometries", ACI Mater. J., 579-590.
  5. Orangun, C.O., Jirsa, J.O. and Breen, J.E. (1975), "Strength of anchored bars: A re-evaluation of test data on development length and splices", Research report 154-3F, Center of Highway Research, University of Texas at Austin, Jan.
  6. Orangun, C.O., Jirsa, J.O. and Breen, J.E. (1977), "A reevaluation of test data on development length and splices", ACI J., 77, 114-122.
  7. Sagan, V.E., Gergely, P. and White, R.N. (1991), "Behaviour and design of noncontact lap splices subjected to repeated inelastic tensile loading", ACI Struct. J., 420-431.
  8. Tepfers, R. (1973), "A theory of bond applied to overlapped tensile reinforcement splices for deformed bars", Publication No. 73:2, Division of concrete structures, Chalmers University of Technology, Goteborg, 328 s.
  9. Tepfers, R. (1979), "Cracking of concrete cover along anchored deformed reinforcing bars", Magazine of Concrete Research, 106, 3-12.

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  3. An analytical study of bond strength associated with splitting of concrete cover vol.31, pp.4, 2009, https://doi.org/10.1016/j.engstruct.2008.12.008
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  10. Bond strength of reinforcing bars in hybrid fiber-reinforced SCC with binary, ternary and quaternary blends of steel and PVA fibers vol.54, pp.4, 2021, https://doi.org/10.1617/s11527-021-01733-7
  11. Investigation of the Impact of Graphene Nanoplatelets (GnP) on the Bond Stress of High-Performance Concrete Using Pullout Testing vol.14, pp.22, 2021, https://doi.org/10.3390/ma14227054