Proposing a simplified and parametric numerical shear stress-strain model for RC deep beams

In this paper, the behaviour of reinforced concrete (RC) elements has been studied and a new shear stress-strain (SS-S) model is proposed for RC deep beams. Timoshenko beam theory is applied to consider the effect of shear deformations in numerical models. To take into account, the effect of bar-concrete interaction, the deep beam is divided into several sub-elements, and individual degrees of freedom are assigned to bars, which allow them to act independently. Since SS-S model is highly sensitive to several factors, a numerical definition of RC deep beams' shear behaviour is presented after assessing the contribution of main effective parameters on RC element's shear behaviour. The mentioned model is a push curve which has three breaking points. Proposed SS-S model is composed of several mathematical equations which allows users to easily predict the shear behaviour of RC deep beams without dealing with complex and time-consuming calculations.