Study of the behavior of reinforced concrete deep beams. Estimate of the ultimate shear capacity

Abstract

In this paper is carried out a study to the behavior of reinforced concrete deep beams by numerical simulation, where the results of numerical analysis are calibrated and validated from existing experimental results in the international literature. In modelling is considered a bilinear model with Von Mises failure criteria for steel and Concrete Damage Plasticity for concrete, achieving an appropriate match between the numerical results against the experimental reference, a feature that allows the parametric study of the influence of geometric factors and reinforcement. Two formulas for estimating the ultimate shear strength of reinforced concrete deep beams under static load with predominance of shear strength as proposed, which are based on empirical models developed from the processing of a large and profuse database where experimental results of the numerical simulation are included. These formulations show adequate accuracy in predicting the ultimate shear strength in these structures compared with some methods implemented on existing codes ACI Comitee 318 (2011) and European Standard EN 1992-1-1 (2004).