Second-order analysis and design of steel structures allowing for member and frame imperfections

J. X. Gu, Siu Lai Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)


Conventional linear analysis is deficient in handling the design of slender frames since the effective length and other non-linear effects are difficult to assess accurately. Some proposed non-linear analyses cannot be directly employed for practical design since they are unable to re-produce the buckling curves of the basic structural element, a simple column under axial force, by a single element per member. This paper describes an advanced element, using the same physical significance as the advanced and second-order analysis proposed by a number of researchers and the BS5950(2000) and AS4100 (1995), for practical design of slender steel frames. The proposed element captures the physical behaviour of a structural member that the buckling strength of the member can be predicted using a single element per member and without assuming any effective length.
Original languageEnglish
Pages (from-to)601-615
Number of pages15
JournalInternational Journal for Numerical Methods in Engineering
Issue number5
Publication statusPublished - 7 Feb 2005


  • Advanced analysis
  • Beam column
  • Geometric non-linearity
  • Steel frame
  • Structural design
  • Tangent stiffness matrix

ASJC Scopus subject areas

  • Numerical Analysis
  • General Engineering
  • Applied Mathematics


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