Nonlinear analysis of inelastic frames considering a corotational approach and plasticity by layers: a discussion about computational implementation

Autores

  • Danilo B. Cavalcanti
  • Rafael L. Rangel
  • Luiz F. Martha

Palavras-chave:

beam-column element, geometric nonlinearity, elasto-plasticity, object-oriented programming

Resumo

This work presents the development of a numerical solver for nonlinear analyses of plane frame

structures using the corotational formulation to take into account geometric nonlinearity and considering an elasto-
plastic constitutive model. A one-dimensional rate-independent plastic model with isotropic hardening was

implemented, and the cross-sections of beam-column elements were subdivided into layers to simulate
plastification. The goal is to discuss the computational implementation aspects of the inelastic material behavior
in an object-oriented framework for nonlinear finite element analysis of frame structural models. A numerical
example is presented to highlight the influence of the inelastic behavior in the equilibrium path of structures.

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Publicado

2024-05-29

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