INELASTIC LATERAL BUCKLING OF BEAM-COLUMNS

An accurate line model based on the finite element method is developed for analysing the inelastic lateral buckling of I- section beams and beam-columns. The prebuckling in-plane bending is analysed using a geometrically nonlinear inelastic finite element method which accounts for the effects of prebuckling displacements and residual stresses on yielding. The results of the prebuckling analysis allow the distributions of yielding and strain hardening throughout the beam to be determined. The out-of-plane flexural-torsional buckling of the inelastic element is analysed by adapting an elastic tapered monosymmetric finite element. For this element, the deflections and twists are referred to an arbitrary straight line axis along the mid- height of the web, instead of the shear centre or centroidal axes. The elastic element is adapted for inelastic buckling by using reduced out-of-plane stiffnesses which allow for yielding and strain-hardening. The method is used to give some indications of the accuracy of earlier studies based on less accurate assumptions. (Author/TRRL)

  • Corporate Authors:

    University of Sydney

    School of Civil and Mining Engineering, Parramatta Road
    Sydney, New South Wales 2006,   Australia 
  • Authors:
    • Bradford, M A
    • Cuk, P E
    • Gizejowski, M A
    • Trahair, N S
  • Publication Date: 1984-6

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 46 p.
  • Serial:
    • Issue Number: R474

Subject/Index Terms

Filing Info

  • Accession Number: 00394164
  • Record Type: Publication
  • Source Agency: ARRB
  • Report/Paper Numbers: Monograph
  • Files: ITRD, TRIS, ATRI
  • Created Date: Aug 31 1985 12:00AM