Análise numérica do comportamento não linear de estruturas mistas de aço e concreto

Abstract

This paper presents the development of an effective numerical formulation for analysis of steel concrete composite structures considering geometric and materials nonlinear effects. Thus, a methodology based on Refined Plastic Hinge Method (RPHM) was developed and the stiffness parameters obtained by homogenization of cross section. The evaluation of structural elements strength is done through the Strain Compatibility Method (SCM). The Newton-Raphson method with path-following strategies is adopted to solve nonlinear global and local (in cross section level) equations. The results are compared with experimental and numerical database presents in literature and a good accuracy is observed in composite cross section, columns and portal frames.