BUCKLING APPROXIMATIONS FOR INELASTIC BEAMS

Hand methods of calculating buckling loads of inelastic moment gradient beams are developed. An inelastic parameter, the stiffness modification factor, j, is used to estimate equivalent uniform tangent modulus rigidities for partially yielded simply supported beams. From this is developed a buckling moment equation. For laterally continuous beams, a step-by-step procedure which allows for interaction between adjacent segments is proposed. The structure is reduced to a critical subassemblage of beam segments. The stiffness modification factor is used to quantify segment and interaction and an effective length factor, k, is found for the critical segment. The buckling moment equation is used to estimate the beam capacity. A worked example and comparisons with theoretical and experimental results show that the proposals are accurate and simple to apply. (Author/TRRL)

• Corporate Authors:

  University of Queensland

  St Lucia
  Brisbane, Queensland 4067,   Australia 
• Authors:
  • DUX, P F
  • Kitipornchai, S
• Publication Date: 1982-10

Media Info

• Features: Figures; References; Tables;
• Pagination: 32 p.
• Serial:
  • University of Queensland Dept Civil Eng Res Rept
  • Issue Number: CE36
  • Publisher: University of Queensland

Subject/Index Terms

• TRT Terms: Beams; Buckling; Calculation; Equations; Loads; Stiffness
• ITRD Terms: 3472: Beam; 5522: Buckling; 6464: Calculation; 5567: Load; 5931: Stiffness
• Subject Areas: Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 00376033
• Record Type: Publication
• Source Agency: ARRB
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS, ATRI
• Created Date: Jul 30 1983 12:00AM