Behavior of Reinforced Concrete Deep Beam with High Strength Reinforcement using SAP2000 Software

Abstract

The use of Finite Element Methods in the analysis of deep beams has become a very useful tool in modern times due to the emergence of powerful computers. The use of Finite Element Analysis is extremely fast and economical as compared to laboratory testing.This thesis consists of two major parts. the first part is about design deep beams by a simply supported beam MS1-2 having shear span to depth ratio of less than 2 has been first designed using truss modeling in SAP2000 Software, using modeling thick shell element technique. The results of design obtained from FEM modeling has been compared with design obtain in the available literature. The second part is about study the behavior of deep beams with high strength reinforcement with various shear span to depth (a/d) ratios and deferent reinforcement ratio ρ to study the strength parameters such as, first crack load, the ultimate failure load, load of yielding in main tension reinforcement, strains in main tension reinforcement, deflection at ultimate load, and mode of failure. The design results obtained from SAP2000 shell thick model was show a good agreement compared with results obtained in the available literature. Comparison showed of the design results using SAP2000 shell (thick) for design deep beam match with the available literature beam (MS1-2).The results obtained from SAP2000 modeling nonlinear shell layered technique have been compared with experimental studies in the available literature. And Comparison of the results showed that the difference between finite element SAP2000 results with experimental results are very acceptable in yielding of rebar of reinforcement , at failure load deference did not exceed 30% in deflection at mid span and not exceed 12.5% in strain of steel layered in all beams. The flexural crack pattern slightly deferent while the mode of failure of all the test beams was almost similar despite the Variations in web reinforcement arrangement. At the last best results obtained when the moment of inertia is reduced to 35% and based on this comparison, it is found that SAP2000 the modeling nonlinear shell layered technique results holds good with the experimental results and that gives satisfactory results with engineering accuracy.