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.

• Record URL:
  http://ftp.fdot.gov/file/d/FTP/FDOT%20LTS/CO/research/Completed_Proj/Summary_STR/FDOT_BD545_07_rpt.pdf
• 
• Summary URL:
  http://ftp.fdot.gov/file/d/FTP/FDOT%20LTS/CO/research/Completed_Proj/Summary_STR/FDOT_BD545_07.pdf
• Corporate Authors:

  University of Florida, Gainesville

  Department of Civil and Coastal Engineering, P.O. Box 116580
  Gainesville, FL  United States  32611-6580

  Florida Department of Transportation

  Structures Research Center, 605 Suwannee Street
  Tallahassee, FL  United States  32399

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Cook, Ronald A
  • Bloomquist, David
  • Sanek, Jonathan E
• Publication Date: 2005-4

Language

• English

Media Info

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

Subject/Index Terms

• TRT Terms: Curvature; Field studies; Girders; Mathematical prediction; Measurement; Prestressed concrete
• Geographic Terms: Florida
• Subject Areas: Bridges and other structures; Data and Information Technology; Design; Highways; I24: Design of Bridges and Retaining Walls;

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