[en] The correct modelling of some phenomena occurring in steel profiles requires a due account for the deformability of the cross section of the profile. Such phenomena are for example local buckling, distortional buckling, lateral buckling, distortional torsion…Different numerical methods are available to study these behaviours (classical finite strips, spline finite strips, plate finite elements, generalised beam theory, special beam elements…). A first part of the paper consists in a qualitative comparative analysis of these methods. In a second part, a new method is proposed, that can be used essentially for the analysis of structures made of members subject to local buckling, or any other phenomenon including a distortion of the cross section. It consists in the integration of the deformability of the cross section directly in a beam element, by enriching the displacement field. Some results related to local buckling, obtained with this modified beam element, are presented.
Disciplines :
Civil engineering
Author, co-author :
Degée, Hervé ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Language :
English
Title :
Proposals for a modified beam finite element embedding the deformation of the cross section
Publication date :
1999
Event name :
SDSS '99 Conferences (Stability and Ductility of Steel Structures)
Audience :
International
Main work title :
Proceedings of the SDSS '99 Conferences (Stability and Ductility of Steel Structures)