LOAD BALANCING ANALYSIS OF CABLE STAYED BRIDGES

THE CABLE STAYED BRIDGE IS A STRUCTURE WELL SUITED FOR LOAD BALANCING, THAT IS FOR REDUCTION OF BENDING MOMENTS AND DISPLACEMENTS THROUGHOUT THE STRUCTURE BY POST-TENSIONING THE CABLES. THE PROBLEM WAS APPROACHED FIRST FROM THE POINT OF VIEW OF REDUCING BENDING MOMENTS. A PROCEDURE WAS DEVELOPED TO ACHIEVE THIS REDUCTION. THE FIRST STEP CONSISTS OF DETERMINING THE BENDING MOMENTS DUE TO A UNIT FORCE APPLIED SUCCESSIVELY ALONG EACH CABLE OF THE BRIDGE SYSTEM. NEXT, A SYSTEM OF EQUATIONS IS WRITTEN TO EXPRESS THE CONDITION THAT THE SUM OF THE BENDING MOMENTS DUE TO UNKNOWN POST-TENSIONING FORCES IN THE CABLES, SHALL BE OPPOSITE IN SIGN AND EQUAL TO A FRACTION OF THE BENDING MOMENT CAUSED BY THE ACTION OF THE DEAD LOAD. BY SOLVING THIS SYSTEM OF EQUATIONS, THE POST-TENSIONING FORCES IN CABLES ARE DETERMINED. A COMPUTER PROGRAM WAS WRITTEN IN FORTRAN LANGUAGE TO CARRY OUT THE COMPUTATIONS. /AUTHOR/

• Supplemental Notes:
  • PROC PAPER 9122
• Authors:
  • Lazar, B E
  • Troitsky, M S
  • Douglass, M M
• Publication Date: 1972-8

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1725-40
• Serial:
  • Journal of the Structural Division
  • Volume: 98
  • Issue Number: st8
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Bending moments; Bridges; Cables; Equations; Posttensioning; Static loads
• Identifier Terms: FORTRAN (Computer program language)
• Uncontrolled Terms: Balancing
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00209772
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 28 1972 12:00AM