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A semi-analytical model for the nonlinear stability analysis of stiffened plates
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Resumo(s)
This paper presents a computational semi-analytical model for the post-buckling analysis
and ultimate strength prediction of stiffened plates under longitudinal uniform compression. The
possibility of considering fully free in-plane displacements at longitudinal edges (or unloaded edges) is
the innovation of this model over existing models, where these displacements are assumed constrained
to remain straight. Comparisons between the semi-analytical model results and nonlinear finite element
model results are presented. This study shows that the developed semi-analytical model predicts with
accuracy the elastic critical buckling stress, the buckling modes, the ultimate strength and the failure
modes obtained through the nonlinear finite element method. The semi-analytical model enables
versatile and comprehensive analysis of results and it is computationally efficient when compared with
the nonlinear finite elements methods.
Descrição
Comunicação apresentada na 8th International Conference on Advances in Steel Structures 2015, 21-24 july 2015, Lisbon, Portugal
Palavras-chave
Stiffened plates Stability Interactive buckling Ultimate strength Semi-analytical method