Repair of Skewed Steel Bridge Girders Damaged by Distortion-Induced Fatigue

Distortion-induced fatigue is the most common cause for fatigue cracking in steel bridges. Skewed steel bridges are highly-susceptible to this failure mode. Skewed bridges in which the cross-frames are placed parallel to the angle of skew are very difficult to repair due to the acute angle between the bent-plate and the girder line. Retrofit techniques are urgently needed to repair fatigue cracks in this type of connection details. A research program is proposed in which girder subassemblies with skewed cross-frames will be tested under distortion-induced fatigue loading. The goal of the study is to develop repair methods that will be also tested in the physical specimens. It is anticipated that multiple test trials can be conducted with each specimen, allowing the evaluation of several repair techniques. A suite of finite element analyses will be performed to complement the physical tests and to aid in the development of the retrofit measures. The proposed research directly addresses the following United States (US) Strategic Goals: (1) enhancing safety; (2) improving the state of good repair; and (3) improving environmental sustainability of the US surface transportation system. Recommendations will be provided regarding the implementation of the various retrofit measures that are developed.

    Language

    • English

    Project

    • Status: Active
    • Funding: $72125.00
    • Contract Numbers:

      DTRT12-G-UTC07

    • Sponsor Organizations:

      Research and Innovative Technology Administration

      University Transportation Centers Program
      1200 New Jersey Avenue, SE
      Washington, DC  United States  20590
    • Performing Organizations:

      University of Kansas, Lawrence

      Transportation Research Institute
      2117 Learned Hall, 1530 W 15th Street
      Lawrence, KS  United States  66045
    • Principal Investigators:

      Rolfe, Stanley

      Matamoros, Adolfo

      Bennett, Caroline

    • Start Date: 20130701
    • Expected Completion Date: 0
    • Actual Completion Date: 20141231
    • Source Data: RiP Project 34772

    Subject/Index Terms

    Filing Info

    • Accession Number: 01487960
    • Record Type: Research project
    • Source Agency: Mid-America Transportation Center
    • Contract Numbers: DTRT12-G-UTC07
    • Files: UTC, RiP
    • Created Date: Jul 24 2013 1:01AM