Construction Wind Loading for Steel Girders – Resiliency and Reliability

Details

• Creators:
  Eshra, Elsayed ; Warn, Gordon ; Papakonstantinou, Konstantinos
• Corporate Creators:
  Pennsylvania State University. Department of Civil and Environmental Engineering
• Corporate Contributors:
  Pennsylvania. Department of Transportation. Bureau of Planning and Research ; United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  Bridge Construction Bridges Under Construction Evaluation Girders Guidelines Lateral Stability Bracing Lateral Supports Literature Reviews Load Bracing Material Resilience Mechanical Stability Reliability Specifications State Of The Art Steel Bridges Steel Girders Wind Wind Loading

  More +
• Publication/ Report Number:
  FHWA-PA-2023-003-PSU WO 010
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Pennsylvania
• Edition:
  18 April 2022 to 18 April 2023
• Corporate Publisher:
  Pennsylvania. Department of Transportation. Bureau of Planning and Research
• Abstract:
  The main objective of this study is to assess and evaluate PennDOT’s current specifications for wind loading on completely erected steel girders with diaphragms installed but prior to the placement of the deck. Current specifications are evaluated with respect to recent changes to AASHTO’s wind loading procedures for bridges under construction based on the 3-second wind gust calculations and the relevant state-of-art research. This report first provides a comprehensive literature review on wind loading for bridges under construction, including the relevant PennDOT wind loading procedures and lateral stability bracing guidelines. Subsequently, the PennDOT wind loading procedures are comparatively examined against the corresponding AASHTO procedures. The structural modeling and analysis procedures, utilized to evaluate the relevant PennDOT’s lateral stability bracing guidelines, are then developed and verified. A parametric study was implemented to assess these guidelines, considering all relevant parameters involved in wind loading, structural modeling, and analysis. Numerous girder systems with different parameter values were analyzed, with a particular emphasis on comparing the lateral displacement of the girder systems against the permissible values. Additional investigations are subsequently discussed to explore the effect of fully and partially fixed transverse diaphragm connections, as well as variations in the diaphragms’ and braces’ cross-section size, on the lateral displacement of girder systems. The impact of the uplift wind forces on system demands is also examined. Based on the findings of this study, it is determined that the current PennDOT’s wind loading procedure is slightly more conservative than AASHTO’s wind loading procedures for bridges under construction for the typical cases of bridges with 4, 5 and 6 main girders and girder spacing to girder depth less than or equal to 3. It is also concluded that lateral stability bracing can be required for bridges with girder span lengths greater than or equal to 150 ft.
• Format:
  PDF
• Funding:
  4400023298-512101 PSU WO 010
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:9448f31b0bb85e4fbb6b6191864e6674b92633bbf44f624ed99093f12a18f3d00ce287f5e0fbc2dac9dd1c2798f4d97465db9ab30ae433bb2ffb8b18d86fc3a1
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/89148/dot_89148_DS1.pdf
• File Type:
  [PDF - 2.70 MB ]