Durability of the Grouted Shear Stud Connection at Low Temperatures

This research proposal addresses the design and behavior of a new, recently developed connection for steel bridge substructures. This new connection, termed the grouted shear stud connection (GSS), was shown to be an effective and improved design over current practice of directly welding hollow circular steel pipe piles to steel cap beams. In previous studies, the new connection performed well, in both quasi-static and dynamic tests at ambient (indoor) laboratory temperatures. Because this new connection relies upon the integrity of grout, a cementitious material prone to degradation from severe environmental conditions typical in Alaska, the durability of this material and the connection as a whole must be assessed. This proposed project focuses on the durability of the GSS by optimizing the grout properties through material testing, and subsequent tests of weathered and unweathered full-scale connection specimens when subjected to temperatures as low as -40° C. The outcome of this research will be a set of design recommendations to maximize the durability and hence the long term performance of the grouted shear stud connection. While developed for new bridge construction, the GSS connection is readily adapted to retrofit applications in existing steel bridge substructures with deficient pipe column to cap beam connections. The results of this study may therefore be of value in the eventual structural upgrade of Bridge No. 455, the Anchorage Port Access.

  • Supplemental Notes:
    • Final Report url: http://dot.alaska.gov/stwddes/research/assets/pdf/4000-162opt.pdf

Language

  • English

Project

  • Status: Active
  • Funding: $190811
  • Sponsor Organizations:

    Federal Highway Administration

    Alaska Division
    709 West 9th Street, Room 851
    Juneau, AK  United States  99802-1648
  • Managing Organizations:

    Alaska Department of Transportation and Public Facilities

    2301 Peger Road
    Fairbanks, AK  United States  99701
  • Performing Organizations:

    North Carolina State University, Raleigh

    Department of Civil Engineering, Campus Box 7908
    Raleigh, NC  United States  27695-7908
  • Start Date: 20160301
  • Expected Completion Date: 20190515
  • Actual Completion Date: 0
  • USDOT Program: Transportation, Planning, Research, and Development
  • Subprogram: Research

Subject/Index Terms

Filing Info

  • Accession Number: 01634563
  • Record Type: Research project
  • Source Agency: Alaska Department of Transportation and Public Facilities
  • Files: RiP, STATEDOT
  • Created Date: May 4 2017 3:12PM