Adjustable Cross-frames for the Erection of Steel Girder Bridges

This project will develop novel, cost-effective adjustable cross-frames for curved and highly skewed steel girder bridges that will enable necessary geometry adjustments in adjacent girders for fit-up while providing a single, permanent cross-frame. Work in Stage 1 will focus on conceptual design of the novel adjustable cross-frames as well as understanding bounds on desired adjustability and developing detailed control sequences. Bounds on what adjustability is needed and whether minor or major adjustment is warranted will be determined. High-fidelity finite element (FE) numerical analyses of 4-5 prototype structures during erection will be performed to determine bounds on girder twist and deflection. Conceptual design will be performed to develop forms for adjustable cross-frames to meet necessary geometric adjustments. For each adjustable cross-frames form, models developed in the earlier task will be used to understand forces developed through jacking and track relative motions of each girder of the prototype structures during adjustment. A control sequence will then be developed for each form. In Stage 2, concepts developed in Stage 1will be numerically evaluated relative to one another and to conventional rigid cross-frames for the prototype structures. A scaled prototype of the most promising design will be built, evaluated, and demonstrated. Research will culminate in recommendations on adjustable cross-frames, including bounds on its applicability.


  • English


  • Status: Active
  • Funding: $135000
  • Contract Numbers:

    20-30/IDEA 227

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

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

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Jawed, Inam

  • Performing Organizations:

    University of Notre Dame

  • Principal Investigators:

    Thrall, Ashley

  • Start Date: 20210101
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01757153
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: 20-30/IDEA 227
  • Files: TRB, RIP
  • Created Date: Nov 4 2020 10:51AM