COMPUTATION OF TENSILE STRESS IN PRESTRESSED MEMBERS DUE TO CABLE RESTRAINT DURING DETENSIONING

The report supplements a previous study (Project ERSD-110-75-6, Highway Research Program, N.C. State University) concerned with end cracking of prestressed concrete girders during cable release. A computer program is developed that will assist in the computation of tension stress due to cable restraint during detensioning, the primary cause of the end cracks. In addition when high tensile stress is unavoidable rational procedures for sheathing some of the cables to reduce tension are described. A parametric study indicates that this tensile stress is of permissible magnitude when the ratio of the length of the cable at each end to the casting bed length is 5% or higher.

• Supplemental Notes:
  • Sponsored in part by North Carolina Dept. of Transportation and Highway Safety, Raleigh.
• Corporate Authors:

  North Carolina State University, Raleigh

  Raleigh, NC  United States  27695

  North Carolina Department of Transportation

  Raleigh, NC  United States 

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Mirza, J F
  • Tawfik, M E
• Publication Date: 1978-1

Media Info

• Pagination: 44 p.

Subject/Index Terms

• TRT Terms: Computer programs; Fabrication; Fracture mechanics; Girders; Highway bridges; Prestressed concrete; Tension
• Uncontrolled Terms: Tensile stress
• Subject Areas: Bridges and other structures; Freight Transportation;

Filing Info

• Accession Number: 00176005
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: ERSD-110-77-3, FHWA/RD-78-S0701
• Files: NTIS, USDOT, STATEDOT
• Created Date: Jul 19 2002 12:00AM