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Shear Strength of Light-Weight Reinforced Concrete Beams with Continuous Rectangular Spiral Reinforcement


Concrete beams reinforced with rectangular spiral shear reinforcement instead of the ordinarily closed stirrups have been recently extended. However, this extension has never been addressed for light-weight concrete structural elements. An experimental program is conducted in this research to investigate the shear performance of light-weight concrete beams that are transversely reinforced with continuous rectangular spirals. Four groups, including 20 specimens, were constructed where the groups contain two different shear span to depth ratios of 2.0 and 1.5 and have two different spiral spacing of 200 mm and 150 mm. Five different inclination angles of the spiral reinforcement were considered for each group: 85°, 80°, 77.2°, 75o, and 72.5°. The beams were tested under static four-point loading. Test results have shown that using rectangular spiral reinforcement has enhanced the shear capacity and deflection of the test specimens. Shear strength enhancement has ranged from 3% up to 47% compared to the ordinarily closed stirrups. Test results have also shown that the angle of inclination, which would result in the best performance, is influenced by the shear span to depth ratio. The optimum angles were found 85° and 75°, for the shear span to depth ratio of 2.0 and 1.5, respectively.

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  1. 1.

    Sheikh SA, Toklucu MT (1993) Reinforced concrete columns confined by circular spirals and hoops. ACI Struct J 90:542–553.

    Article  Google Scholar 

  2. 2.

    Haque M, Al-Khaiat H, Kayali O (2004) Strength and durability of light-weight concrete. Cem Concr Compos 26:307–314.

    Article  Google Scholar 

  3. 3.

    Oktay H, Yumrutaş R, Akpolat A (2015) Mechanical and thermophysical properties of light-weight aggregate concretes. Constr Build Mater 96:217–225.

    Article  Google Scholar 

  4. 4.

    Chi J, Huang R, Yang C, Chang J (2003) Effect of aggregate properties on the strength and stiffness of light-weight concrete. Cem Concr Compos 25:197–205.

    Article  Google Scholar 

  5. 5.

    Kockal NU, Ozturan T (2011) Strength and elastic properties of structural light-weight concretes. Mater Des 32:2396–2403.

    Article  Google Scholar 

  6. 6.

    ACI Committee 318 (2019) Building code requirements for structural concrete (ACI 318–19) and commentary. ACI Committee, American Concrete Institute

    Google Scholar 

  7. 7.

    Cembureau (1974) Lightweight aggregate concrete: technology and world applications. Associazione Italiana Technico Economica del Cemeto, Paris

    Google Scholar 

  8. 8.

    Spratt BH (1975) An introduction to light-weight concrete. Cement and Concrete Association

    Google Scholar 

  9. 9.

    Slate FO, Nilson AH, Martinez S (1986) Mechanical properties of high-strength lightweight concrete. ACI J Proc 83:606–613.

    Article  Google Scholar 

  10. 10.

    Kong FK, Evans RH (1983) Handbook of structural concrete. McGraw-Hill

    Google Scholar 

  11. 11.

    Juan KY (2011) Cracking mode and shear strength of lightweight concrete beams. National University of Singapore

    Google Scholar 

  12. 12.

    Xiaopeng L (2005) Structural lightweight concrete with pumice aggregate. National University of Singapore

    Google Scholar 

  13. 13.

    Kang THK, Kim W, Kwak YK, Hong SG (2011) Shear testing of steel fiber-reinforced light-weight concrete beams without web reinforcement. ACI Struct J 108:553–561.

    Article  Google Scholar 

  14. 14.

    Ababneh A, Al-Rousan R, Alhassan M, Alqadami M (2017) Influence of synthetic fibers on the shear behavior of light-weight concrete beams. Adv Struct Eng 20:1671–1683.

    Article  Google Scholar 

  15. 15.

    Lo TY, Tang WC, Cui HZ (2007) The effects of aggregate properties on light-weight concrete. Build Environ 42:3025–3029.

    Article  Google Scholar 

  16. 16.

    Shahrooz BM, Forry ML, Anderson NS et al (2016) Continuous transverse reinforcement—behavior and design implications. ACI Struct J 113:1085–1094.

    Article  Google Scholar 

  17. 17.

    Karayannis CG, Chalioris CE (2013) Shear tests of reinforced concrete beams with continuous rectangular spiral reinforcement. Constr Build Mater 46:86–97.

    Article  Google Scholar 

  18. 18.

    Karayannis CG, Chalioris CE, Mavroeidis PD (2005) Shear capacity of RC rectangular beams with continuous spiral transversal reinforcement. Comput Methods Exp Meas 41:379

    Google Scholar 

  19. 19.

    Chalioris CE, Karayannis CG (2013) Experimental investigation of RC beams with rectangular spiral reinforcement in torsion. Eng Struct 56:286–297.

    Article  Google Scholar 

  20. 20.

    De Corte W, Boel V (2013) Effectiveness of spirally shaped stirrups in reinforced concrete beams. Eng Struct 52:667–675.

    Article  Google Scholar 

  21. 21.

    Shatarat N, Katkhuda H, Abdel-Jaber M, Alqam M (2016) Experimental investigation of reinforced concrete beams with spiral reinforcement in shear. Constr Build Mater 125:585–594.

    Article  Google Scholar 

  22. 22.

    Shatarat N, Mahmoud HM, Katkhuda H (2018) Shear capacity investigation of self compacting concrete beams with rectangular spiral reinforcement. Constr Build Mater 189:640–648.

    Article  Google Scholar 

  23. 23.

    Karayannis CG (2015) Mechanics of external RC beam-column joints with rectangular spiral shear reinforcement: experimental verification. Meccanica 50:311–322.

    Article  Google Scholar 

  24. 24.

    Maranan GB, Manalo AC, Benmokrane B et al (2018) Shear behaviour of geopolymer-concrete beams transversely reinforced with continuous rectangular GFRP composite spirals. Compos Struct 187:454–465.

    Article  Google Scholar 

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The authors would like to thank the deanship of academic research at the University of Jordan for their financial support to perform this research.


This study was funded by the deanship of academic research at the University of Jordan.

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Correspondence to Yasmin Murad.

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Al-Zaidaneen, H., Murad, Y., Jaber, M.A. et al. Shear Strength of Light-Weight Reinforced Concrete Beams with Continuous Rectangular Spiral Reinforcement. Int J Civ Eng (2021).

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  • Light-weight concrete
  • Reinforced concrete beams
  • Continuous rectangular spirals
  • Shear reinforcement