TORSIONAL ANALYSIS OF BOX-GIRDER SUSPENSION BRIDGES

THEORIES ARE PRESENTED FOR THE STATIC TORSIONAL ANALYSIS OF THE SINGLE-SPAN BOX-GIRDER SUSPENSION BRIDGE. AN ELASTIC THEORY IS DEVELOPED AND THEN EXTENDED TO A DEFLECTION THEORY. IT IS SHOWN THAT THE TORSIONAL ELASTIC THEORY IS USUALLY INADEQUATE IN PREDICTING THE BRIDGE'S BEHAVIOR UNDER TORSIONAL LIVE LOADING AND THAT RECOURSE SHOULD ALWAYS BE MADE TO THE TORSIONAL DEFLECTION THEORY, WHICH IS NOT INTRINSICALLY MORE DIFFICULT. THREE EXAMPLES ARE GIVEN TO SHOW THAT THE TORSIONAL ANALYSIS IS GOVERNED PRIMARILY BY TWO CHARACTERISTIC DIMENSIONLESS PARAMETERS. THESE ARE THE RELATIVE TORSIONAL STIFFNESS PARAMETER (OF DECK AND CABLES), THE PARAMETER INVOLVING CABLE GEOMETRY AND ELASTICITY, AND THE TORSIONAL STIFFNESS OF THE TOWERS.

• Supplemental Notes:
  • PROC PAPER 10464
• Authors:
  • Irvinehm
• Publication Date: 1974-4

Media Info

• Pagination: p. 789-812
• Serial:
  • Journal of the Structural Division
  • Volume: 100
  • Issue Number: st4
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Analysis; Box girders; Bridge members; Deflection; Elasticity (Mechanics); Stiffness; Suspension bridges; Theory; Torsion
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00210090
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 26 1974 12:00AM