Numerical analysis of nonlinear behavior of steel-concrete composite structures

• Main Authors: Í.J.M. LEMES, A.R.D. SILVA, R.A.M. SILVEIRA, P.A.S. ROCHA
• Format: Article
• Language: English
• Published: Instituto Brasileiro do Concreto (IBRACON)
• Series: Revista IBRACON de Estruturas e Materiais
• Subjects: análise não linear; MRPR; curvas de interação; MCD; Relação momento-curvatura
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952017000100053&lng=en&tlng=en

Abstract This paper presents the development of an effective numerical formulation for the 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 were 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 sections, composite columns, and composite portal frames.