An examination of the flexural characteristics of rebarreinforced concrete beams with hybridization

Abstract

This study examines the flexural behaviour of concrete beams reinforced by hybridization steel rebar and covered in CFRP sheet Seven samples were cast and tested under twopoint stress six of which were reinforced with CFRP hybrid steel barsheet and one of which served as a control beam and was reinforced with standard steel bars The hybrid steel barsheet CFRPs diameter and the amount of carbon sheet warping steel bar were the two main factors evaluated Investigations have been made on failure processes initial and final cracking loads crack patterns loaddeflection curves and maximum deflection A hybrid steel barsheet CFRP technique produced the same behaviour as control beams while lowering maximum deflection according to experiments In addition compared to the reference beam it increased load capacity by 435 percent to 4261 percent When compared to the control sample all augmented specimens displayed an overall reduction in maximum displacement although the initial cracking load did not change The hybridization length which is twothirds of the length of the beam offers the best reinforcing length for one and two in terms of ultimate load by 2174 percent and 3913 percent respectively in comparison to the control beam