Study of Flexure Behavior of Beams Reinforced with Different Hybrid Percent of Glass and Carbon Bars

Abstract

An experimental program has been conducted in order to investigate the flexural behavior of concrete beams reinforced with hybrid glass and carbon bars. A test series of fifteen simple beams containing different types of reinforcement (steel, glass and hybrid carbon & glass) bars had been conducted in this investigation. The parameters included in the experimental program are the reinforcement ratio, the carbon fiber volume fraction (CFVF) in the bar and the strength of concrete. The effect of hybrid bars reinforcement on the flexural response, cracking load, crack propagation, deflection, ultimate capacity, strain in the reinforcement bar at middle of the span and failure characteristics for the beams, is examined. Based on the experimental results, It was founded that the beams reinforced with hybrid bars behave linearly up to cracking load with high initial stiffness and linearly after cracking with great reduction in stiffness, As the carbon fiber volume faction increase the deflection of the beam at ultimate load decrease, Beams reinforced with hybrid bars 40% C and 50% C with medium strength concrete give higher ultimate load than that of the beam reinforced with steel at the same strength of concrete, but  generally with less number of cracks.