Field Verification of Camber Estimates for Prestressed Concrete Bridge Girders

Prestressed concrete girders are used on many of Florida's bridges. These girders are subject to camber, the upward deflection of the girder due to the eccentricity of the prestressing force. Differences have been found between camber predicted by the design program employed by the Florida Department of Transportation (FDOT) and the measured field camber for prestressed "Bulb-Tee" girders. These differences can cause changes and delays during construction because of corrections to build-up and/or bearings of the bridge superstructure. The focus of this investigation was to obtain field measurements of camber on large prestressed girders over an extended period of time. This information was used to evaluate the current camber prediction model used by the FDOT. Specifically, the types of girders monitored for this project were 1) the 78-in. Florida Bulb-Tee girder, 2) the AASHTO Type IV girder, and 3) the AASHTO Type V girder.

Language

  • English

Media Info

  • Media Type: Print
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 129p

Subject/Index Terms

Filing Info

  • Accession Number: 01001567
  • Record Type: Publication
  • Report/Paper Numbers: BD-545 RPWO #7, UF Project No. 00030896
  • Contract Numbers: BD545 RPWO #7
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jul 7 2005 1:53PM