Local-distortional interaction in cold-formed steel rack-section columns

P.B. Dinis, Ben Young, D. Camotim

Research output: Journal article publicationJournal articleAcademic researchpeer-review

55 Citations (Scopus)


Experimental and numerical results concerning the post-buckling behaviour and strength of fixed-ended cold-formed steel rack-section columns experiencing local-distortional (L-D) interaction are reported. The experimental results, obtained from tests carried out at The University of Hong Kong include initial imperfection measurements, equilibrium paths and failure loads/modes - they provide clear evidence of the above coupling phenomenon. After presenting and discussing a comparison between test results and the values yielded by the corresponding Abaqus shell finite element numerical simulations, the experimental failure loads are used to assess the quality of their estimates provided by design approaches based on the Direct Strength Method (DSM) that were recently developed exclusively for fixed-ended lipped channel columns affected by L-D interaction. The work also includes a comparison between the ultimate strength and DSM design of lipped channel and rack-section columns undergoing similar L-D interaction effects. © 2013 Elsevier Ltd.
Original languageEnglish
Pages (from-to)185-194
Number of pages10
JournalThin-Walled Structures
Publication statusPublished - 1 Jan 2014
Externally publishedYes


  • Cold-formed steel rack-section columns
  • DSM (Direct Strength Method) ultimate strength prediction
  • Experimental results
  • Local-distortional interaction
  • Numerical simulations

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering


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