Behavior of Plain Concrete Beam subjected to Three Point Bending using Concrete Damaged Plasticity (CDP) Model

Abstract

Concrete is an integral part of construction industry which is widely used throughout the globe. Concrete being heterogeneous in nature complicates the understanding of predicting its actual behavior under static or cyclic loading. Widespread use of concrete has increased the urge to accurately predict the response and design of concrete structures more accurately. In this paper, computer based simulation is carried out using Finite Element Analysis package- ABAQUS to study the Non-linear behavior of concrete by Concrete Damaged Plasticity (CDP) model. CDP model is a modified form of Drucker-Prager criterion and it takes into account the isotropic compressive and tensile plasticity of concrete to represent the inelastic behavior of concrete in association with its isotropic damaged elasticity. Tensile cracking and compression crushing in concrete are taken into consideration in this model. Load vs. Displacement curves were achieved for unreinforced concrete beams of various sizes subjected to three-point bending test. Also, effect of mesh refinement on CDP model has been studied so as to accurately predict the desired results