Effect of Screw Head- and Hook-on Bond Behavior of Flamingo Shear Reinforcing Technique in Concrete

Asmaa  Sh Mahmood; Suhad M. Abd; Isam S. Mhaimeed

doi:10.24237/djes.2023.16111

Authors

Asmaa Sh Mahmood
eng_grad_civil051@uodiyala.edu.iq
Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq
Suhad M. Abd Department of Highways & Airports Engineering, University of Diyala, 32001 Diyala, Iraq
Isam S. Mhaimeed Department of Civil Engineering, University of Diyala, 32001 Diyala, Iraq

Keywords:

Screw head,, Flamingo technique,, Hook,, Shear strength

Abstract

An alternative reinforcing shear technique was proposed during this work in place of the traditional vertical stirrups. Three reinforced concrete beams with dimensions of (200 * 300) mm and a length of 1800 mm were used. A reference control beam with traditional vertical stirrups (RCWS) and two beams reinforced with flamingo with a fixed angle of 45° and free ends (50% and 50%) from effective depth were used, while the main variable was the bonding process with concrete using a screw head (FWS) and hook (FWH). In the flamingo technique, the hook was used and the screw head was used at an equal angle of 130 degrees. A significant improvement was found in the shear capacity of the beam compared to the reference sample. Also, using a screw head made the shear capacity 13.22% higher than using a hook and improved the shear ductility, final deflection, and crushing behavior of beams made with the flamingo technique.

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