Basic study on 3D fracture simulation of reinforced concrete using finite-strain material models

Abstract

This paper proposes a method for simulating 3D fracture behavior of reinforced concrete using finite-strain material models and demonstrates the validity of the method. The finite-strain formulation is applied so that the geometrical nonlinearity can be considered in the fracture simulation. The fracture behavior of concrete is modeled by a finite-strain damage model which is based on the modified von-Mises criterion and fracture mechanics for concrete. The finite-strain von-Mises plasticity is applied to the plastic behavior of reinforcing bars. We first show the formulation of finite-strain damage model for concrete and finite-strain plasticity model for steel. A numerical example of RC beam with different shear reinforcements is presented to demonstrate the validity of the proposed method. The comparison between the numerical and experimental results offer valuable insight into the applicability of the proposed method to 3D fracture simulation of reinforced concrete in consideration of geometrical nonlinearity.