LATERAL BUCKLING APPROXIMATIONS FOR ELASTIC BEAMS

A simple hand method of calculating very good estimates of the elastic lateral buckling loads of laterally continuous beams is developed in this paper. The method uses an equivalent uniform moment concept to allow for the type of loading on the beam, and an effective length concept to allow for the interactions at the brace points between adjacent segments. Few additional computations are required over and above those necessary to determine the commonly calculated lower bound estimate of the buckling load, since the additional calculations of the new method are made only for the most critical segment. Comparisons of the predictions of the proposed method and of the lower bound method with the accurate finite element results show that the proposed method consistently leads to far more accurate predictions. /Author/TRRL/

  • Availability:
  • Corporate Authors:

    Institution of Structural Engineers

    11 Upper Belgrave Street
    London,   United Kingdom  SW1X 8BH
  • Authors:
    • Nethercot, D A
    • Trahair, N S
  • Publication Date: 1976-6

Media Info

  • Features: Figures; References;
  • Pagination: p. 197-204
  • Serial:
    • Structural Engineer
    • Volume: 54
    • Issue Number: 6
    • Publisher: Institution of Structural Engineers
    • ISSN: 1466-5123

Subject/Index Terms

Filing Info

  • Accession Number: 00147648
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Jun 22 1977 12:00AM