Local-distortional interaction in cold-formed steel lipped channel beams: Experimental investigation

André Dias Martins, Dinar Camotim, Pedro Borges Dinis, Man Tai Chen, Ben Young

Research output: Journal article publicationJournal articleAcademic researchpeer-review


Nominee Professor Eduardo de Arantes e Oliveira Award 2021. This paper reports an experimental investigation on the behaviour and strength of cold-formed high-strength steel (G450–G500) lipped channel beams susceptible to local–distortional interaction. The experimental campaign comprised 36 tests involving simply supported beams bent about the major axis, exhibiting various ratios between their distortional and local critical buckling moments (from 1.09 to 1.46) and acted by either uniform (20 tests) or non-uniform (trapezoidal: 16 tests) bending diagrams. The results presented and discussed consist of equilibrium paths, photos providing the evolution of the beam deformed configurations and failure moments. The paper also includes a few remarks on the design, using the Direct Strength Method, of the beams under consideration.

Original languageEnglish
JournalSteel Construction
Publication statusAccepted/In press - 2022


  • Analysis and design
  • cold-formed steel lipped channel beams
  • Direct Strength Method (DSM) design
  • experimental investigation
  • Experiments
  • four-point bending tests
  • local–distortional interaction
  • Steel buildings
  • uniform and non-uniform bending

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Metals and Alloys


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