Shear Behaviour Of Reinforced Concrete Beams Without Web Reinforcement

This thesis mainly concentrated on the performance of reinforced concrete beams without web reinforcement.This research was conducted in three phases,which were experimental study,analytical investigation,and numerical simulation.The experimental phase was conducted to investigate the influence of various variables on the performance behavior of the shear strength.Thirty-six reinforced concrete beams were tested:including twenty-seven beams with T-shaped,while the remaining nine beams with a rectangular shape.Shear span-to-depth ratio（a/d）,tension reinforcement ratio（ρ）,and beam shape were the primary investigated parameters,while the compressive strength of concrete（1）_（8）kept constant.The experimental findings indicated that each variable has a significant improvement,particularly,the contributions of the flange on the shear behavior of RC beams.The analytical phase was carried out to predict an applicable equation that could compute the shear behavior of reinforced concrete beams having rectangular and T-shape without web reinforcement.Based on the shear database of 1093 for rectangular and 152for T-beams,two proposed equations were established and verified against several international codes,Zsutty equation and then thirty-six beams of this study.The proposed equations showed an incredible,accurate,and consistent predictions of shear behavior of the beams.The numerical phase,using the Finite Element Analysis method in ABAQUS was conducted to simulate the shear performance of the beams in the 1^st group.Several investigated parameters such as the shape of the beam（Rectangular and T-beam）,flange width（125mm for rectangular,250,375,and 500 for T-beams）,and tension reinforcement ratio were used to investigate the shear strength and mode of failure and then compared with those obtained experimentally.The Concrete Damage Plasticity（CDP）model was used.The predicted results from FEM is in good conformity with the experimental results.Also,the accuracy of shear strength obtained from FEM was higher than or equal to 87%compared with shear strength obtained from experimental results.