ULTIMATE LIVE LOAD DISTRIBUTION FACTOR FOR BRIDGES

The purpose of this research was to establish a more realistic lateral load distribution factor, in conjunction with the AASHTO Load Factor Design Method. The distribution factor at ultimate load is designated as Dp, which is Dp = 3.45 - i.809 gamma + 0.315 gamma squared, in which gamma = number of girders/ number of lanes. This equation gives approximately a value of S/7.0, as compared to the present value of S/5.5. The analytical method, which permitted development of this equation, considered the elastoplastic behavior of loaded composite girder slab bridge systems. The method involved solution of elastic plate equations with modifications to include inelastic action. Several design examples are presented in order to illustrate the use of the equations.

• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Heins, C P
  • Kuo, JTC
• Publication Date: 1975-7

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 1481-96
• Serial:
  • Journal of the Structural Division
  • Volume: 10
  • Issue Number: ST7
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Breaking loads; Bridges; Composite materials; Elastoplasticity; Girders; Live loads; Load factor; Load transfer
• Uncontrolled Terms: Elastic plastic analysis
• Old TRIS Terms: Composite girders
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00126471
• Record Type: Publication
• Report/Paper Numbers: ASCE #11443 Proceeding
• Files: TRIS
• Created Date: Dec 16 1975 12:00AM