Bifurcation and large-deflection analyses of thin-walled beam-columns with non-symmetric open-sections

Si Wei Liu, Ronald D. Ziemian, Liang Chen, Siu Lai Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

38 Citations (Scopus)


Non-symmetric thin-walled open-sections are used extensively in metal structures. The behaviour of such sections is usually complex because their shear centre and centroid do not coincide, and as a result, they are often susceptible to lateral-torsional and/or flexural-torsional buckling. This paper develops an efficient and robust computational framework for practical application, including a refined beam-column element for non-symmetric sections, a cross-section analysis algorithm for determining pertinent properties of open-sections, and an Updated-Lagrangian (UL) solution method for large deflection analysis. Details of the derivation of element stiffness matrices and the related numerical procedures are provided. Several examples are given that demonstrate accurate results from its implementation within the educational structural analysis software MASTAN2.

Original languageEnglish
Pages (from-to)287-301
Number of pages15
JournalThin-Walled Structures
Publication statusPublished - Nov 2018


  • Buckling
  • Elements
  • Geometric nonlinear analysis
  • Open sections
  • Steel
  • Thin-walled
  • Wagner effects
  • Warping

ASJC Scopus subject areas

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


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