Size Effect on Shear Strength of Reinforced Concrete Beams without Stirrups

Given the great discord concerning the mechanisms that govern shear failure, the shear behaviour of concrete beam elements with no transverse reinforcement is investigated. The variables introduced in the experimental program are member depths and amount of longitudinal steel reinforcement. The effects of these variables on the shear stress at failure of the concrete are investigated. Two geometrically similar series of beams with different steel reinforcements are prepared. The dimensions of beams are 200 mm (w) x 400 mm (d) x 2000 mm (l) and all the beams have a constant a/d ratio of 2.0. Apart from that, the beams casted will be in two different kinds of states, one is under-reinforced beam and the other beam is over-reinforced beam. Plus, the beams will be analyzed the changes in the shear strength with smaller dimension beams with similar, distinct and constant longitudinal steel percentages (1.3% for under-reinforced and 2.34% for over-reinforced).