Axle equivalent transverse loading on segmental bridge decks.

Details

• Creators:
  Roddenberry, Michelle ; Jung, Sungmoon ; Patil, Atul
• Corporate Creators:
  Florida Agricultural and Mechanical University. Dept. of Civil and Environmental Engineering
• Subject/TRT Terms:
  • Bridge decks
  • Axle loads
  • Load factor
  • Finite element method
  • Permits
  • Bending moments
  • Box girder bridges
  • Trucks
• Publication/ Report Number:
  BDK83-977-16
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  For a prestressed concrete segmental box girder bridge, both design and load rating are determined by ; longitudinal and transverse analyses. A transverse analysis is performed for the top slab, typically by ; using Homberg charts (an engineer’s design tool), to account for transverse bending effects due to truck ; wheel loads. The FDOT Office of Maintenance issues thousands of permits annually for heavy trucks. ; These trucks may have different axle weights and spacings than the trucks that are analyzed in the ; engineer’s design or load rating. ; In this research, a Homberg-based tool was developed in Excel for analyzing vehicles for their effect on ; transverse bending moments in a prestressed concrete segmental box girder bridge. The tool allows the ; user to analyze vehicle loads quickly and provides a simple way to compare effects of different ; vehicles. For example, the effects of vehicles that were analyzed in the designer’s load rating could be ; compared to vehicles with axle weights and spacings that were not analyzed in the initial load rating. ; In addition, Finite Element Modeling (FEM) was performed to study the effect on transverse bending ; moment of elements such as barriers, barrier joints, diaphragms, supports, and expansion joints. The ; effect of axle load spacing was also studied to give insight into the Office of Maintenance’s formerly-used “8-foot rule.” Calculated bending moments from Homberg analysis and FEM were compared for a ; few “Blanket” Permit Vehicles. “Blanket” Permit Vehicles are those vehicles permitted to travel an ; unrestricted number of times on unrestricted routes within one calendar year.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27228/dot_27228_DS1.pdf
• File Type:
  [PDF - 4.47 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:29adb3856a3c3492eab3684216a4af595fd55b3b44fbb4ddec8f258778dd6ede