ONE-DIMENSIONAL CONSTITUTIVE MODELS FOR NONLINEAR STATIC ANALYSIS OF REINFORCED CONCRETE STRUCTURES

Resumo

This work aims at the nonlinear static analysis of reinforced concrete structures using con-
stitutive 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 vali-
dated 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.