Structural Engineering and Mechanics

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Behavior and crack development of fiber-reinforced concrete spandrel beams under combined loading: an experimental study

  • Ibraheema, Omer Farouk (Department of Civil Engineering, University Sains Malaysia (USM)) ;
  • Abu Bakar, B.H. (Department of Civil Engineering, University Sains Malaysia (USM)) ;
  • Joharib, I. (Department of Civil Engineering, University Sains Malaysia (USM))
  • Received : 2013.10.11
  • Accepted : 2014.08.31
  • Published : 2015.04.10
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Abstract

An experimental investigation is conducted to examine the behavior and cracking of steel fiberre-inforced concrete spandrel L-shaped beams subjected to combined torsion, bending, and shear. The experimental program includes 12 medium-sized L-shaped spandrel beams organized into two groups, namely, specimens with longitudinal reinforcing bars, and specimens with bars and stirrups. All cases are examined with 0%, 1%, and 1.5% steel fiber volume fractions and tested under two different loading eccentricities. Test results indicate that the torque to shear ratio has a significant effect on the crack pattern developed in the beams. The strain on concrete surface follows the crack width value, and the addition of steel fibers reduces the strain. Fibrous concrete beams exhibited improved overall torsional performance compared with the corresponding non-fibrous control beams, particularly the beams tested under high eccentricity.

Keywords

References

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