Recommendations on the geometrical imperfections definition for the resistance of I-sections

The resistance and design of steel sections such as I and H-shapes usually depends in great extents on their ability to resist buckling, as a result of high width-to-thickness b / t ratios in the plates constituents. Consequently, these sections remain quite sensitive to imperfections. Information o...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of constructional steel research 2019-11, Vol.162, p.105716, Article 105716
Hauptverfasser: Gérard, Lucile, Li, Liya, Kettler, Markus, Boissonnade, Nicolas
Format: Artikel
Sprache:eng
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The resistance and design of steel sections such as I and H-shapes usually depends in great extents on their ability to resist buckling, as a result of high width-to-thickness b / t ratios in the plates constituents. Consequently, these sections remain quite sensitive to imperfections. Information on imperfections, a key data for F.E. simulations, is however quite lacking in design standards, either for material imperfections or for geometrical imperfections. Accordingly, an extensive numerical study on hot-rolled and welded I and H-sections was carried out with the aim of providing reliable and efficient recommendations for the F.E. modelling of initial geometrical imperfections. Several sets of imperfections were investigated including the use of (i) sine-shape functions and of (ii) the 1st buckling mode shape. Reliable recommendations based on modification of nodes coordinates by means of sine-shape functions could be proposed afterwards.
ISSN:0143-974X
1873-5983
DOI:10.1016/j.jcsr.2019.105716