Shear Behavior of Reinforced Concrete Slender Beams Using High-Strength Concrete

An experimental investigation is carried out on Nine Slender HSC beams with constant size 125mm x 130mm and effective length 900mm by varying (i) The longitudinal reinforcement ratio and (ii) the web reinforcement ratio were casted and tested to understand the shear behavior of the beams with minimum web reinforcement as per IS CODE and ACI CODE and maximum web reinforcement. The load-deflection behavior and the failure pattern of the beams, ultimate shear strength are studied with varying longitudinal reinforcement and varying shear reinforcement. The experimental results obtained are compared with the theoretical values as per code. Based on these observations, it can be concluded that, there are many parameters influencing the shear behavior of RC beams such as shear span to depth ratio (a/d ratio>2), concrete grade, depth of the beam, the percentage of the longitudinal reinforcement and shear reinforcement. It can be concluded that, the shear failure is brittle, sudden and very explosive. As the spacing of shear reinforcement reduced (75mm) the load carrying capacity increased and as the spacing of shear reinforcement increased (225, 300mm) the load carrying capacity decreased. Shear failure is characterized by small deflection, lack of ductility and catastrophic failure.