Parametric study on Nonlinear Finite Element Analysis on flexural behaviour of RC beams using ANSYS

Nonlinear behaviour of RC beams is complex due to involvement of various parameters. Many attempts have been made by the past researchers to predict the behaviour using ANSYS. The accuracy and convergence of the solution depends on factors such as mesh density, constitutive properties of concrete, convergence criteria and tolerance values etc., Past researchers have used various values of the above factors without providing much generalized guidelines. Hence, in order to lay a wider base for the behaviour prediction of RC beams using ANSYS, a large number of trial analysis were carried out by changing various parameters. In this paper, results of the four point bending analysis conducted with respect to concrete constitutive properties, mesh density, use of steel cushion for the supports and loading points, effect of shear reinforcement on flexural behaviour, convergence criteria, and impact of percentage of reinforcement are analysed and discussed. The outcome of this work will provide a wider platform for further usage of ANSYS in the analysis of RC beams.