Steel Pin-and-Hanger Assembly Replacement Options

A number of steel beam bridges exist in Nebraska that contain steel pin and hanger assemblies. These assemblies were used to facilitate construction and/or to reduce the level of indeterminacy along a given beam line when the bridges were originally built. Deck expansion joints accompany the pin and hanger assembles and, as the bridges that contain them continue to age, these assemblies have collected debris and moisture and, in certain instances, have deteriorated to a point where their retrofit or removal is being considered. Should removal be necessary and complete replacement of the beam adjacent to the assembly not be needed, one desired option may be to use bolted splices where the pin and hanger assembly once existed. However, clear protocols related to how these splices, and the bridge around them, would be designed are not available in relevant specifications. An extensive body of information related to the design of web and flange splices for steel beams and girders does exist along with some information related to retrofitting and replacing existing pin and hanger assemblies. If organized, this information could be brought to bear to assist Nebraska Department of Roads (NDOR) with guiding future research that would help develop a design protocol for replacing pin and hanger assemblies in Nebraska should NDOR deem it necessary to develop a protocol. Therefore, a project focusing on synthesizing the information would help NDOR with future decisions related replacing pin and hanger assemblies. The proposed synthesis project will: (1) summarize U.S. splice design state-of-the art; (2) explore pin and hanger replacement options the have been studied and implemented in the U.S.; (3) use information from (1) and (2) to identify viable retrofitdesign options for possible use by NDOR; and (4) synthesize findings to assist NDOR with selecting retrofit options to further investigate/research and/or implement.

    Language

    • English

    Project

    • Status: Active
    • Funding: $20257.00
    • Contract Numbers:

      SPR-P1(16) M042

    • Sponsor Organizations:

      Federal Highway Administration

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

      Nebraska Department of Roads

      1500 Highway 2
      Lincoln, NE  United States  68502
    • Performing Organizations:

      University of Nebraska, Lincoln

      527 Nebraska Hall
      Lincoln, NE  United States  68588-0529
    • Principal Investigators:

      Linzell, Daniel

    • Start Date: 20150701
    • Expected Completion Date: 0
    • Actual Completion Date: 20161231
    • Source Data: RiP Project 39674

    Subject/Index Terms

    Filing Info

    • Accession Number: 01569412
    • Record Type: Research project
    • Source Agency: Nebraska Department of Roads
    • Contract Numbers: SPR-P1(16) M042
    • Files: RiP, STATEDOT
    • Created Date: Jul 11 2015 1:00AM