Effectiveness of exterior beam rotation prevention systems for bridge deck construction.

Details

• Creators:
  Ashiquzzaman, Md ; Li, Hui ; Schmeltz, Justin ; Merino Calvo, Carlos ; Bozkurt, Bora ; Ibrahim, Ahmed ; Lindquist, Will ; Hindi, Riyadh
• Corporate Creators:
  Saint Louis University. Parks College of Engineering, Aviation and Technology
• Corporate Contributors:
  Illinois. Department of Transportation. Bureau of Materials and Physical Research ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Bridge decks
  • Girders
  • Rotation
  • Bracing Overhang width
  • exterior girder rotation
  • rotation prevention system
  • TAEG program
  • experimental study
• Publication/ Report Number:
  FHWA-ICT-16-015
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Illinois Center for Transportation
• Abstract:
  Bridge decks often overhang past the exterior girders in order to increase the width of the deck while limiting the required ; number of longitudinal girders. The overhanging portion of the deck results in unbalanced eccentric loads to the exterior girders, ; which are generally greatest during construction. These eccentric loads mainly come from the bridge placing and finishing ; equipment as well as fresh concrete and other construction live loads that can create rotation of the exterior girders in the ; transverse direction. The rotations can also affect both the global and local stability of the girders as well as the bridge. In this ; study, the current bracing systems used by the Illinois Department of Transportation (IDOT) were evaluated through field ; instrumentation, finite element analysis (FEA), and the use of the Torsional Analysis Exterior Girders (TAEG)) program. ; Alternative bracing systems were evaluated through an experimental study and FEA. Based on this work, it is recommended that ; intermediate cross frames with top and bottom angles in addition to cross-angle sections in the exterior panels be specified to ; limit exterior girder rotation during construction. An alternative approach is to place transverse ties and diagonal pipes in the ; exterior panels at a spacing to maintain the spacing-to-girder-depth ratio below 3.94.
  More +
• Format:
  PDF
• Funding:
  R27-140
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/31070/dot_31070_DS1.pdf
• File Type:
  [PDF - 4.12 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:8153d2426ad1306905eb3491312bf33206634a0828a1416122397c8154382342070cbe5e8a8275d8142de1ee0819430b8fa3e403f8438f1bb631bfc3ea3edb3a