DEVELOPMENT LENGTH OF STRANDS IN PRESTRESSED PANEL SUBDECKS

THIS REPORT DESCRIBES THE RESULTS OF FIELD AND LAB STUDIES OF PRESTRESSED CONCRETE PANELS OF THE TYPE PROPOSED FOR USE IN A NEW METHOD OF HIGHWAY BRIDGE CONSTRUCTION. TWENTY PANELS, UTILIZING TWO DIFFERENT STRAND SIZES, CONCRETE TYPES, AND PANEL LENGTHS WERE CONSIDERED. OBJECTIVES INCLUDED THE DETERMINATION OF THE DEVELOPMENT LENGTH OF THE PRESTRESSING STRANDS SHORTLY AFTER FABRICATION AND THE EFFECT OF CYCLIC LOADING ON THIS DEVELOPMENT LENGTH. CHANGES IN PANEL STIFFNESS AS A RESULT OF FATIGUE LOADING WERE ALSO MONITORED. TEST RESULTS SHOWED THAT AN AVERAGE 22 IN. OF DEVELOPMENT LENGTH WAS REQUIRED FOR 3/8 IN. DIAMETER, 7-WIRE STRANDS PRETENSIONED WITH A FORCE OF 13.75 KIPS. AN AVERAGE DEVELOPMENT LENGTH OF 34 IN. WAS REQUIRED FOR 1/2 IN. DIAMETER STRANDS PRETENSIONED WITH A FORCE OF 27.50 KIPS. CYCLIC LOADING WAS FOUND, TO HAVE NEGLIGIBLE EFFECT ON STRAND DEVELOPMENT LENGTH OR ON PANEL STIFFNESS. /AUTHOR/

  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    Texas State Department of Highways & Public Transp

    11th and Brazos Streets
    Austin, TX  United States  78701
  • Authors:
    • Jones, H L
    • Furr, H L
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00212110
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: No 145
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jan 31 1972 12:00AM