Journal of
Civil Engineering and Construction Technology

  • Abbreviation: J. Civ. Eng. Constr. Technol.
  • Language: English
  • ISSN: 2141-2634
  • DOI: 10.5897/JCECT
  • Start Year: 2010
  • Published Articles: 140

Full Length Research Paper

Flexural behaviour of cantilever concrete beams reinforced with glass fiber reinforced polymers (GFRP) bars

Mohamed S. Issa* and S. M. Elzeiny
Housing and Building National Research Center, Giza, Egypt.
Email: [email protected]

  •  Accepted: 31 January 2011
  •  Published: 28 February 2011



The objective of the current study is to investigate and evaluate the flexural behavior of concrete cantilever beams when using locally produced GFRP bars as a longitudinal main reinforcement. The experimental program includes six concrete cantilever beams. The main parameters were the type of rebars (steel or GFRP), strength of concrete and ratios of GFRP rebars. The results of experiments were evaluated and discussed. The ultimate flexural capacities were calculated theoretically.  Then a comparison between both experimental and theoretical results was done. This comparison indicated that the theoretical analysis gives results which are about 30% lower than the experimental ultimate flexural capacity for GFRP-reinforced cantilever beams. Also, deflections were calculated and it was found that the model of Brown and Bartholomew for Ie (effective moment of inertia) gives the best predictions for deflections.


Key words: Flexure, cantilever, deflection, glass fiber reinforced polymers (GFRP) bars.