PRESTRESS LOSSES DUE TO THE EFFECT OF SHRINKAGE AND CREEP ON NONTENSIONED STEEL

Comparative tests on four types of beams all having the same initial prestressing force were carried out by the authors at Southampton in 1970-71. All four types were of about the same ultimate resistance, but they had different amounts of nontensioned steel in the ratios 1:2.68:4.0:5.22. The effective prestress with maximum amount of nontensioned steel was only 60 percent of that with minimum amount of nontensioned steel. Based on the good agreement between measurements and CEBFIP formulas, the losses were evaluated for humidities between 50 and 100 percent for the four types of beams of different percentages of nontensioned steel; this indicates that the prestressing losses at infinity increase substantially with reduced humidity and enlarged percentage of nontensioned reinforcement.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0889325X
• Corporate Authors:

  American Concrete Institute

  P.O. Box 19150, Redford Station, 22400 Seven Mile Road
  Detroit, MI  United States  48219
• Authors:
  • Abeles, P W
  • Kung, R
• Publication Date: 1973-1

Media Info

• Pagination: p. 19-27
• Serial:
  • American Concrete Institute, Journal of
  • Volume: 70
  • Issue Number: 1
  • Publisher: American Concrete Institute
  • ISSN: 0889-325X

Subject/Index Terms

• TRT Terms: Beams; Bridges; Concrete bridges; Prestressed concrete; Prestressed concrete bridges; Prestressing
• Subject Areas: Bridges and other structures; Railroads;

Filing Info

• Accession Number: 00044320
• Record Type: Publication
• Report/Paper Numbers: Proceeding
• Files: TRIS
• Created Date: Jun 1 1973 12:00AM