Effect of Length of Free Ends of Flamingo Shear Reinforcing Technique on Shear Capacity of Reinforced Concrete

Abstract

An alternative shear reinforcement technique has been proposed which is the flamingo technique, instead of the traditional vertical stirrup, it is made prefabricated. Five reinforced concrete beams were used with dimensions (200 × 300 × 1800) mm, two reference (with stirrups and without stirrups) and three beams using flamingo technique having diameter with (8 mm), and free ends by constant inclination angle (45°). This study aims to determine how a change in length of free ends affects the Flamingo technique. The length of free ends was used (50–50%), (75–50%) and (60–80%) from the effective depth of beam. According to the resuts, found that the beams showed an improvement in shear strength of by (108.3, 116.7 and 153.7%) when compared with beam without stirrup, and by 25, 30 and 52.2% over the reference beam with stirrup, as well as, it was observed that the beam containing ratios of 50 and 50% exceeded other ratios by 17.9 for the beam 80–60 and by 11.9 for the beam 75–50%,on other hand, the deflection improved by (10.01%, 10.9%, and 30%) respectively, compared to reference beam with stirrup.