Extending Maximum Length of the Folded Steel Plate Girder Bridge System (FSPGBS), exceeding 100 ft. with capability to Incorporate Camber

Majority of substandard bridges needing replacement are under 100 ft. long and are simple spans. Folded Steel Plate Girder Bridge System (FSPGBS) provide an economical short span steel bridge alternative for bridges less than 60 ft. long. The feedback from contractors and consultant is that developing modified version of FSPGBS, with maximum span lengths approaching 100 ft. will significantly help the bridge industry. In fact, inspection of U.S. bridge inventory indicates that majority of substandard bridges are less than 100 ft. long and are simple spans. FSPGBS have many advantages for both steel fabricators and bridge owners. Folded plate girders suitable for different span lengths differ only by their cross-sectional dimensions. The different top and bottom flange widths and web depth can easily be accommodated by changing the bend locations so fabricators can build folded girders very quickly while only stocking two plate thicknesses (1/2 and 3/8 inches). The shape of the cross section for the FSPGBS has several key advantages in its design and construction. Following are brief descriptions of some of the advantages. The inverted tub shape produces a very stable bridge girder configuration that does not require internal or external cross frames for either local or global stability. A typical box section needs top lateral bracing, during construction and during replacement of deck. The FSPGBS does not internal or external bracing, which has proven to cause many fatigue cracking challenges. Casting the deck on top of folded plate girder could use conventional construction equipment and practices, if needed. The top flange of the folded plate girder is wide enough (about 25 in. to 35 in.) to serve as a work platform. Because of the torsional stiffness of the folded plate girder, there is no need for providing internal or external bracing during construction. Perhaps the major advantage of FSPGBS over tub or box bridges, is the opening from the bottom side that allows easy inspection of the girder and prevents accumulation of moisture. For longer span bridges the depth of a closed box is large enough to enter inside and inspect and clean if needed. Hot Dip Galvanizing the FSPGBS is a very good option for corrosion protection. Hot dip galvanizing can provide more than 75 years of service life at a very economical cost. Typical cost of hot dip galvanizing ranges between 18 to 22 cents per pound of steel.

Language

  • English

Project

  • Status: Completed
  • Contract Numbers:

    DTRT13-G-UTC41

  • Sponsor Organizations:

    Accelerated Bridge Construction University Transportation Center (ABC-UTC)

    Florida International University
    10555 W. Flagler Street
    Miami, FL  United States  33174

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    Accelerated Bridge Construction University Transportation Center (ABC-UTC)

    Florida International University
    10555 W. Flagler Street
    Miami, FL  United States  33174
  • Project Managers:

    Azizinamini, Atorod

  • Performing Organizations:

    Accelerated Bridge Construction University Transportation Center (ABC-UTC)

    Florida International University
    10555 W. Flagler Street
    Miami, FL  United States  33174
  • Principal Investigators:

    Azizinamini, Atorod

  • Start Date: 20190329
  • Expected Completion Date: 20190331
  • Actual Completion Date: 20190329
  • USDOT Program: University Transportation Centers
  • USDOT Program: University Transportation Centers Program

Subject/Index Terms

Filing Info

  • Accession Number: 01701724
  • Record Type: Research project
  • Source Agency: Accelerated Bridge Construction University Transportation Center (ABC-UTC)
  • Contract Numbers: DTRT13-G-UTC41
  • Files: UTC, RiP
  • Created Date: Apr 10 2019 5:52PM