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
  • Steel bridges
  • Girder bridges
  • Pouring
  • Traffic flow
  • Finite element method
• 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.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28149/dot_28149_DS1.pdf
• File Type:
  [PDF - 3.63 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:d2aa54d1aa29a7a1ea31ae5272ff3e9c055016c22f387eb43317b6cf982f7dc5