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Reinforced concrete deep beams are structural members having depth much greater than normal in relation to their span, while the thickness in the perpendicular direction is much smaller than either span or depth. The strength of deep beams is usually controlled by shear, rather than flexure. In this study, the previous researches related to reinforced concrete deep beams will be reviewed. These researches approximately started in the second half of the past century. Large numbers of researchers studied the behavior of concrete deep beams and the determination of their capacity. Some of these researches are experimental investigations carried out by testing a number of deep beams with variation in some parameters, while the others are theoretical to estimate deep beam capacity by developing some theories and suggestion of equations for calculating its capacity and comparisons were made with those adopted by some codes. Because of the large number of these researches, their review requires large part of this study, and because the prior studies elaborately reviewed the pioneer researches, only the researches made since year 2000 will be reviewed in this study.

This paper deals with a numerical simulation of reinforced concrete square columns. The behavior of reinforced square columns of normal and high strength concrete was studied, and special attention paid to the concrete strength, ratio of longitudinal steel reinforcement, as well as reinforcement steel grade of this type of columns. In the present study, ABAQUS program was utilized to represent the response of this type of columns. The numerical model of finite element employs the approach of damaged plasticity for concrete. For effectiveness, a column of reinforced concrete was represented that had been comparison with experimental results that presented from the other researchers. In this research the numerical results were done for three types of loading, columns subjected to pure compressive force only (compression failure is done), columns undergo bending moment only (tension failure is done), and finally columns under axial load as well as bending moment such that the tension and compression failure is done at same moment. An interaction equation was derived in this research and can be applicable for any section of columns. The present equation was appeared a very good results when compare its interaction diagram with interaction diagram driven from previous works.

This research is devoted to investigate the experimental and theoretical behavior of deep beams under monotonic two points loading. An experimental program examining six RC deep beams is carried out. The investigated parameters include shear span to depth ratio varying from 1.0 to 0.276. A comparative study is conducted in this paper by using finite element software ANSYS. The experimental and numerical results show that concrete strength and shear span to depth ratio are the two most important parameters in controlling the behavior of RC deep beams. Comparison of experimental results was made with corresponding predicted values using the Strut and Tie procedure presented ACI 318M-11Code and with other procedures mentioned in the literature. It was found that the Strut and Tie procedure presented in ACI 318M-11Code give conservative results as compared with the experimental tested results. The results showed reliability of analysis in predicting deep beams behavior in terms of failure load, failure mode as well as crack propagation.

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