Experimental Investigation of the Cross-Sectional Bending Capacity of Cold-Formed Steel Channels Subject to Local-Distortional Buckling Interaction

Jun Ye, Francisco Meza, Iman Hajirasouliha, Jurgen Becque, Paul Shepherd, Kypros Pilakoutas

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Abstract

This paper describes an experimental programme carried out at the University of Sheffield to investigate the interaction of local and distortional buckling in cold-formed steel lipped channel beams. The channels were arranged in a back-to-back configuration and a total of six tests, including three different cross-sectional geometries, were completed. The specimens were tested in a four-point bending configuration with simply supported boundary conditions, while being laterally braced at the loading points. The beams were observed to fail in the constant moment span by interaction of local and distortional buckling. The geometric imperfections of the channels were recorded before the test using a specially designed measuring rig employing laser sensors. Tensile coupons were also extracted from the flat portions and the corner regions of the cross-sections in order to determine the material properties.
Comparisons showed good agreement between the experimental results and the predictions of Eurocode 3, as well as those of the current AISI DSM provisions, whilst other DSM formulations based on the NLD and NDL concepts resulted in rather conservative predictions.
Original languageEnglish
Article number04019064
Pages (from-to)1-15
Number of pages15
JournalJournal of Structural Engineering
Volume145
Issue number7
Early online date6 May 2019
DOIs
Publication statusPublished - 31 Jul 2019

Keywords

  • Experiment
  • Cold-formed steel
  • Channel
  • Stability
  • Buckling
  • Local-Distortional Interaction

Cite this

Experimental Investigation of the Cross-Sectional Bending Capacity of Cold-Formed Steel Channels Subject to Local-Distortional Buckling Interaction. / Ye, Jun; Meza, Francisco; Hajirasouliha, Iman; Becque, Jurgen; Shepherd, Paul; Pilakoutas, Kypros.

In: Journal of Structural Engineering, Vol. 145, No. 7, 04019064, 31.07.2019, p. 1-15.

Research output: Contribution to journalArticle

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