Geometric nonlinear analysis of asymmetric thin-walled beam-columns

Siu Lai Chan, S. Kitipornchai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

88 Citations (Scopus)


The geometric nonlinear analysis of structures comprising members of asymmetric thin-walled open section is investigated. The geometric stiffness matrix for a thin-walled element is derived, incorporating second order nonlinear strain terms in the governing energy equations. The derived stiffness matrices are used to predict bifurcation loads of a number of structures. An updated Lagrangian formulation, coupled with the numerical arc-length technique, is employed to trace the non-linear load-deflection paths up to the maximum load. Numerical examples of the load-deflection behaviour of eccentrically loaded and restrained unequal angle beam-columns are presented.
Original languageEnglish
Pages (from-to)243-254
Number of pages12
JournalEngineering Structures
Issue number4
Publication statusPublished - 1 Jan 1987
Externally publishedYes


  • asymmetry
  • beam-columns
  • geometric nonlinearity
  • matrices
  • structural analysis
  • thin-wall

ASJC Scopus subject areas

  • Civil and Structural Engineering


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