LONG-TERM FIELD STUDY OF STRESSES IN A POST-TENSIONED CONCRETE GIRDER BRIDGE

SIX TYPICAL, SIMPLE-SPAN, POST-TENSIONED CONCRETE BRIDGE GIRDERS OF THE POWER STRUCTURES INTAKE BRIDGE AT OAHE DAM, PIERRE, SOUTH DAKOTA, WERE INSTRUMENTED FOR STUDY OF PRESTRESS LOSSES. MEASURED AND PREDICTED (DESIGN) PRESTRESS LOSSES AND THE STATE OF PRESTRESS ARE COMPARED AT STRESS TRANSFER AND 4 1/2 YEARS LATER. CREEP AND SHRINKAGE LOSSES AND THE STATE OF PRESTRESS AT 4 1/2 YEARS APPROACHED PREDICTED VALUES. MEASURED FRICTION LOSSES, APPARENTLY CLOSELY RELATED TO ELASTIC SHORTENING, DID NOT COMPARE WITH PREDICTED VALUES. IT IS CONCLUDED THAT THE STATE OF PRESTRESS IS SATISFACTORY, BUT THE STRESS DISTRIBUTION DOES NOT MATCH THAT ANTICIPATED BY THE WORKING STRESS DESIGN. /RRL/A/

• Supplemental Notes:
  • pp 631-654, 12 FIG, 15 TAB, 4 PHOT, 3 REF
• Corporate Authors:

  Intl Symp Concr Bridge Des Proc /Can

  ,    
• Authors:
  • Marks, J D
  • Keifer, O
• Publication Date: 1969

Subject/Index Terms

• TRT Terms: Concrete bridges; Creep; Deformation curve; Friction; Girder bridges; Losses; Posttensioning; Prestressing; Shrinkage; Stresses
• Old TRIS Terms: Simple span
• Subject Areas: Bridges and other structures; Highways;

Filing Info

• Accession Number: 00208700
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Nov 18 1970 12:00AM