Experimental Shear Capacity Comparison Between Repaired and Unrepaired Girder Ends

Over time, the southbound exterior girder ends on each side of Pier 4 and Pier 26 of Bridge 27568 have suffered significant corrosion damage that exposed shear reinforcement, exterior flange prestressing strands, and the sole plate anchorages. Girder ends were repaired in September 2013 by encasing a 4-foot length of the end using a system of dowels, additional shear reinforcement, and shotcrete. The bridge is scheduled for replacement in 2017. There is interest in determining if the repair was sufficient to restore the original strength of the girder end in shear. Load testing to failure will be conducted on two repaired girder ends and two unrepaired girder ends that will be removed from the bridge. Objectives include a comparison of the failure load between the repaired ends and the unrepaired ends. Experimentally demonstrating that the repair restores the girders up to the design strength enhances the safety of the bridge and provides Minnesota Department of Transportation (MnDOT) with a documented substantiated repair method that can be applied to other bridge girders in a similar state.

  • Supplemental Notes:
    • Prestressed Beam End Repair Testing: Bridge 27568

Language

  • English

Project

Subject/Index Terms

Filing Info

  • Accession Number: 01632450
  • Record Type: Research project
  • Source Agency: Minnesota Department of Transportation
  • Contract Numbers: 1003325 WO#19
  • Files: RiP, STATEDOT
  • Created Date: Apr 21 2017 11:16AM