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:
  Axle Loads Bending Moments Box Girder Bridges Bridge Decks Finite Element Method Load Factor Permits 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:29adb3856a3c3492eab3684216a4af595fd55b3b44fbb4ddec8f258778dd6ede
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27228/dot_27228_DS1.pdf
• File Type:
  [PDF - 4.47 MB ]