Load Rating of Arch Bridges

Several methods have been explored for load rating of arch bridges, with most of the research being conducted outside the United States. The Delaware Department of Transportation (DelDOT) is currently using the STAAD-III computer software program to aid in load rating the arch bridges in their bridge inventory. This software package is not specific to arch bridges; rather, it is used to analyze and design a variety of structure types, including those made of truss, frame, and plate/shell elements. When an arch bridge is modeled using this software, it is represented as an assemblage of frame elements. Once the arch is modeled, truck loads representing the various rating vehicles are applied. Then the bridge is analyzed using STAAD-III. Next, three influence lines are determined for the three critical arch sections. These critical arch sections are the midpoint of the arch, the quarter point, and at the springing. Basic principles are used to calculate the properties for the critical sections. The stresses are calculated at the critical sections. Once the influence lines are determined, the load ratings are determined. Then the arch is rated for the controlling sections. This method is the basis of the method developed in this report. The primary difference between STAAD-III and the proposed method is that effective width and live load distribution are altered based on load test results.


    • English


    • Status: Completed
    • Sponsor Organizations:

      Delaware Department of Transportation

      P.O. Box 778
      Dover, DE  USA  19901
    • Performing Organizations:

      Delaware Center for Transportation

      301 DuPont Hall
      Office 360D Dupont Hall
      Newark, DE  USA  19716
    • Principal Investigators:

      Shenton, Harry

      Chajes, Michael

    • Start Date: 19990701
    • Actual Completion Date: 20021031
    • Source Data: RiP Project 17680

    Subject/Index Terms

    Filing Info

    • Accession Number: 01459904
    • Record Type: Research project
    • Source Agency: Delaware Department of Transportation
    • Files: RiP, STATEDOT
    • Created Date: Jan 3 2013 1:14PM