LATERAL BUCKLING OF LOCALLY BUCKLED BEAMS USING FINITE ELEMENT TECHNIQUES

This paper deals with lateral-torsional buckling of beams which have already buckled locally before the occurrence of overall buckling. Due to the weakening effects of local buckling, the stiffness of the beam is reduced. As a result, overall lateral buckling takes place at a lower load than the member would carry in the absence of local buckling. The effective width concept is used in this investigation to account for the post-buckling strength in the buckled compression plate elements of the beam section. A finite element formulation in conjunction with effective width concept is presented. Due to the nonlinearity involved because of local buckling, an iterative procedure is necessary. Search techniques are used to find the load factor. The method combined with an analysis on nonlinear bending moment distribution can be used to analyze the lateral stability problem of locally buckled continuous structure. In this case, both elastic stiffness matrix and geometric stiffness matrix must be revised at each load level. A computer program has been prepared for an IBM 37-/165 computer. /Author/TRRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00457949
• Corporate Authors:

  Pergamon Press, Incorporated

  Maxwell House, Fairview Park
  Elmsford, NY  United States  10523
• Authors:
  • Wang, S T
  • Yost, M I
  • Tien, Y L
• Publication Date: 1977-6

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 469-475
• Serial:
  • Computers and Structures
  • Volume: 7
  • Issue Number: 3
  • Publisher: Elsevier
  • ISSN: 0045-7949

Subject/Index Terms

• TRT Terms: Beams; Bridge design; Bridges; Buckling; Finite element method; Loads; Mathematical analysis; Stability (Mechanics); Stiffness; Strength of materials; Structural design; Torsion
• Uncontrolled Terms: Side
• ITRD Terms: 6471: Analysis (math); 3472: Beam; 5522: Buckling; 6490: Finite element method; 9074: Side; 5930: Stability; 5931: Stiffness; 5544: Strength (mater); 5512: Torsion
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00164286
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Analytic
• Files: ITRD, TRIS
• Created Date: Mar 7 1978 12:00AM