Distribution factors for construction loads and girder capacity equations, final report.

Details

• Creators:
  Consolazio, Gary R. ; Honig, Jeffrey M.
• Corporate Creators:
  University of Florida. Dept. of Civil and Coastal Engineering
• Corporate Contributors:
  Florida. Dept. of Transportation. Research Management Center
• Subject/TRT Terms:
  Concrete Bridges Construction Load Distribution Factor Girder Girders Highway Bridges I Beams Live Loads Loads Prestressed Concrete Bridges Stability Thermal Sweep Wind Load

  More +
• Publication/ Report Number:
  Report 2017/124011
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  University of Florida. Department of Civil and Coastal Engineering
• Abstract:
  During the process of constructing a highway bridge, there are several construction stages that warrant
  
  consideration from a structural safety and design perspective. The first objective of the present study was to use analytical
  
  models of prestressed concrete girders (Florida-I Beams) at multiple stages of construction to update previously developed
  
  capacity equations for wind load and gravity load. Updated analytical bridge models were developed that accounted for a
  
  revised definition of lateral girder sweep—one that accounted for both maximum allowable fabrication tolerance as well as
  
  transverse thermal gradients (i.e., thermally induced sweep). Subsequently, analytical parametric studies were conducted to
  
  update—using the revised definition of sweep—previously developed girder capacity equations. The updated capacity
  
  equations take into consideration different Florida-I Beam cross-sections, span lengths, wind loads, skew angles, and brace
  
  stiffnesses.
  
  A second objective in this study was to use finite element analyses of partially constructed bridge systems—
  
  consisting of multiple Florida-I Beam (FIBs) with construction loads—to quantify distribution factors for interior and
  
  exterior girder end shear forces and maximum girder moments. A large-scale parametric study was conducted with
  
  consideration of different Florida-I Beam cross-sections, span lengths, girder spacing, deck overhang widths, skew angles,
  
  number of girders, number of braces, and bracing configurations (K-brace and X-brace) to quantify shear and moment
  
  distribution factor data. These data were subsequently used to develop empirical construction stage distribution factor (DF)
  
  equations at multiple levels of design conservatism.
  
  
• Format:
  PDF
• Funding:
  BDV31-977-46
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:b60802f0df7b292040eda4c01048116b7f16e4599ba12bd483ad12d1308f51ea
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/32132/dot_32132_DS1.pdf
• File Type:
  [PDF - 3.81 MB ]