Reference Type:  Journal Article
Record Number: 1
Author: Silvestre, N., Camotim , D. and Dinis, P. B.
Year: 2008
Title: Direct strength prediction of lipped channel columns experiencing local-plate/distortional interaction
Journal: Advanced Steel Construction
Volume: 5
Issue: 1
Pages: 23
Start Page: 49
Short Title: Direct strength prediction of lipped channel columns experiencing local-plate/distortional interaction
DOI: 10.18057/IJASC.2009.5.1.4
Keywords: Direct Strength Method (DSM), cold-formed steel, lipped channel columns, strength, local-plate buckling, distortional buckling, local-plate/distortional interaction.
Abstract: This paper reports an ongoing investigation intended to assess the performance of the Direct Strength Method (DSM) to estimate the ultimate strength of lipped channel columns affected by local-plate/distortional mode interaction. First, the DSM approaches to safety check columns against local-plate and distortional failures are briefly reviewed, with special attention devoted to a recently proposed extension that takes into account the above buckling mode interaction. Next, one presents and discusses the results of a parametric study, carried out by means of the code ABAQUS and involving the evaluation of the “exact” ultimate loads of 63 lipped channel columns with various geometries, all exhibiting local-plate/distortional interaction. Then, these ultimate strength data are compared with the estimates provided by the available DSM formulae and, on the basis of this comparison, one identifies several features that a DSM approach successfully accounting for local-plate/distortional interaction must incorporate.
Author Address: Department of Civil Engineering and Architecture, ICIST/IST, Technical University of Lisbon, Portugal