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Comparative study of factors influencing tension lap splices in reinforced concrete beams

  • Received : 2020.05.31
  • Accepted : 2020.08.21
  • Published : 2020.10.25
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Abstract

The practice of splicing reinforcing bars in reinforced concrete structures to manage insufficient bar length is a common approach, which is mainly due to transportation limitations on bar length. The splicing of reinforcing bars side by side offers a simple and economical solution to the problem of continuity. This paper examines the influence of different structural parameters such as concrete cover, lap splice length, shear links confinement and concrete strength on the lap splices based on an extensive experimental database of laps and anchorage. The current study shows that increasing the lap splices beyond 50Ø has no additional benefit for increasing its strength. The results also show that relative to the measured stress, specimens with larger concrete side covers shows higher splice stress compared to the samples with smaller concrete covers.

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References

  1. ACI Committee 408 (2003), ACI 408R-03 Bond and Development of Straight Reinforcing Bars in Tension, American Concrete Institute.
  2. Adel, A.A., Raid, A.D. and Sultan, A.D. (2020), "Behaviour of tension lap spliced sustainable concrete flexural members", Adv. Concrete Constr., 9(1), 83-92. https://doi.org/10.12989/ACC.2020-9.1.083.
  3. Bournas, D.A. and Triantafillou, T.C. (2011), "Bond strength of lap-spliced bars in concrete confined with composite Jackets", J. Compos. Constr., 15(2), 156-167. https://doi.org/10.1061/(ASCE).1943-5614.0000078.
  4. BS EN 1992-1-1 (2004), Eurocode 2: Design of Concrete Structures-Part 1-1: General Rules and Rules for Buildings, British Standards Institution.
  5. Canbay, E. and Frosch, R.J. (2006), "Bond strength of lap-spliced bars", ACI Struct. J., 102(4), 605-614.
  6. CIBFIP (1991), CEB-FIP Model Code 1990: Design Code, Bulletin d'Information, Thomas Telford Service Esfahani, London.
  7. Conbay, E. (2007), "Comparison of code provision on lap splices", Struct. Eng. Mech., 27(1), 63. https://doi.org/10.12989/sem.2007.27.063.
  8. Fib TG4.5, F. (2014), Bond and Anchorage of Embedded Reinforcement: Background to the fib Model Code for Concrete Structures 2010.
  9. Keihani, R., Bahadori-Jahromi, A. and Goodchild, C. (2019), "The significance of removing shear walls in existing low-rise RC frame buildings-sustainable approach", Struct. Eng. Mech., 71(5), 563-576. https://doi.org/10.12989/sem.2019.71.5.563.
  10. Kianoush, M. and Tajari, A. (2007), "Flexural behaviour of reinforced concrete beams strengthened by CFRP sheets", Eng. Struct., 29(10), 2428-2444. https://doi.org/10.1016/j.engstruct.2006.12.008.
  11. Mabrouk, R.T.S. and Mounir, A. (2018), "Behavior of RC beams with tension lap splices confined with transverse reinforcement using different types of concrete under pure bending", Alex. Eng. J., 57(3), 1727-1740. https://doi.org/10.1016/j.aej.2017.05.001.
  12. Micallef, M. and Vollum, R. (2017), "The effect of shear and lap arrangement on reinforcement lap strength", Struct., 12, 253-264. https://doi.org/10.1016/j.istruc.2017.09.004.
  13. Micallef, M. and Vollum, R.L. (2018), "The behaviour of long tension reinforcement laps", Mag. Concrete Res., 70(14), 739-755. https://doi.org/10.1680/jmacr.17.00285.
  14. Model Code (2010), fib Model Code for Concrete Structures 2010, fib Model Code for Concrete Structures 2010.
  15. Osifala, K.B. and Akeju, T.A.I. (2018), "Influence of stirrups on overlap splice strength of epoxy coated deformed bars", Constr. Sci., 20(1), 38-46. https://doi.org/10.2478/cons-2017-0006.
  16. Pandurangan, K., Kothandaraman, S. and Sreedaran, D. (2010), "A study on the bond strength of tension lap splices in self compacting concrete", Mater. Struct./Materiaux et Constr., 43(8), 1113-1121. https://doi.org/10.1617/s11527-009-9570-3
  17. Rakhshanimehr, M., Esfahani, M.R., Kianoush, M.R., Mohammadzadeh, B.A. and Mousavi, S.R. (2014), "Flexural ductility of reinforced concrete beams with lap-spliced bars", Can. J. Civil Eng., 41(7), 594-604. https://doi.org/10.1139/cjce-2013-0074.
  18. Tastani, S.P., Brokalaki, E. and Pantazopoulou, S.J. (2015), "State of bond along lap splices", J. Struct. Eng., 141(10), 04015007. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001243.
  19. Tepfers, R. (1973), "A theory of bond applied to overlapped tensile reinforcement splices for deformed bars", Division of Concrete Structures, Chalmers University of Technology, Goteborg.
  20. Tepfers, R. (1980), "Bond stress along lapped reinforcing bars", Mag. Concrete Res., 32(112), 135-142. https://doi.org/10.1680/macr.1980.32.112.135.
  21. Tovi, S., Goodchild, C. and Bahadori-Jahromi, A. (2017), "Deformation of multi-storey flat slabs, a site investigation", Adv. Concrete Constr., 5(1), 49-63. https://doi.org/10.12989/acc.2017.5.1.49.
  22. Wu, C.H., Chen, W.Y. and Chen, H.J. (2018), "Bond behavior of tension bar at lap splice of SCC beam", Key Eng. Mater., 126-130, 8. https://doi.org/10.4028/www.scientific.net/KEM.789.126.