PREDICTION OF PRESTRESS LOSSES IN POST-TENSIONED MEMBERS

A previous procedure for the estimation of long-term prestress losses in pretensioned concrete bridge members is expanded to apply to post-tensioned members. The procedure is based on the same basic characteristic stress-strain-time relationships for the concrete and steel materials. The time and strain compatibility conditions are modified to reflect the particular conditions in a post-tensioned member. Further modifications are made to allow for multi-stage post-tensioning, as well as application of loads at several stages. Examples are presented demonstrating the use of these proposed procedures. Results are compared with those obtained from the method contained in the present AASHTO Specifications. /FHWA/

Media Info

  • Pagination: 97 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00308475
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-PA-RD-74-3.3 Intrm Rpt., FCP 45F3-692
  • Contract Numbers: 74-3
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Apr 22 1980 12:00AM