MODELAÇÃO NUMÉRICA DE VIGAS EM PERFIS DE AÇO FORMADOS A FRIO COM SEÇÃO TRANSVERSAL SIGMA EM SITUAÇÃO DE INCÊNDIO

Resumo

This paper presents the development of a finite element model suitable for predicting the
flexural behaviour of cold-formed steel beams under fire conditions. The numerical simulations were
performed with the finite element program Abaqus in order to understand the potential that this
program provides in modelling cold-formed steel under fire conditions. This paper provides details of
the simulation methodology for achieving numerical stability and faithful representation of detailed
structural behaviour under fire condition. The assessment of the accuracy of the developed numerical
model was conducted by comparing the axial restraining forces, vertical displacements, critical
temperatures and failure modes obtained from finite element simulations with some experimental
results, in order to validate the developed finite element model and to consequently obtain reliable
numerical results.