M324 : investigation of closure pour elimination for phased construction of steel girder bridges.

Details

• Creators:
  Norton, Terri R. ; Shane, Armando
• Corporate Creators:
  University of Nebraska--Lincoln. Charles W. Durham School of Architectural Engineering and Construction
• Subject/TRT Terms:
  Bridge Construction Bridge Decks Finite Element Method Girder Bridges Pouring Steel Bridges Traffic Flow
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Nebraska. Dept. of Roads
• Abstract:
  Phased construction is a common practice used by State DOTs during the
  
  replacement of a bridge. This method allows for the traffic flow to be maintained on half
  
  of the bridge while a new deck is constructed on the other half. For steel girder bridges
  
  there is often an issue with differential elevation between the phases. This difference in
  
  elevation often prevents the second half of the deck from being poured in one step. Instead,
  
  a portion of the second half of the deck is poured and then a third phase, “closure pour” is
  
  used to connect the first two poured slabs. This closure pour can significantly extend the
  
  construction time and increase the cost of the deck.
  
  The enclosed investigation assesses the deflection of a phased constructed steel
  
  girder bridge in Bellevue, Nebraska. The camber and deflection data, of the phases, from
  
  the design specs was compared to a numerical model and tilt sensor readings. The finite
  
  element model was analyzed the CSI Bridge structural analysis software. The numerical
  
  results were on trend with the design specs, although the values were slightly larger.
  
  Therefore, calibration is needed for the finite element model. Six weeks of daily deflection
  
  data was captured by the EL-tilt sensor. However, due to several issues the further data
  
  mining is required before comparisons can be made to the design plans and numerical
  
  results.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:d2aa54d1aa29a7a1ea31ae5272ff3e9c055016c22f387eb43317b6cf982f7dc5
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28149/dot_28149_DS1.pdf
• File Type:
  [PDF - 3.63 MB ]