One-dimensional constitutive models for nonlinear static analysis of reinforced concrete structures

Abstract

This work aims at the nonlinear static analysis of reinforced concrete structures using constitutive models based on the Plasticity Theory and the Continuum Damage Mechanics. The elastic damage model proposed by Mazars and the elastic-plastic damage model proposed by Lee and Fenves are studied and one-dimensional versions of these models are implemented in a finite element program. The plane frame elements used in this work are formulated with a co-rotacional Lagrangean kinematic description. The integration of stress resultants and tangent constitutive matrix is carried out by the Fiber Method. The formulation and computational implementation at the material and element level are validated using numerical and experimental results available in the literature. A reinforced concrete column under the action of a monotonic load is analyzed and the results show that the use of the implemented one-dimensional models for concrete structures is an effective methodology to capture some important effects.