Development of wave and surge atlas for the design and protection of coastal bridges in South Louisiana.

Details

• Creators:
  Sheppard, D. Max ; Dompe, Philip E. ; Gosselin, Mark S. ; Demir, Hüseyin
• Corporate Creators:
  Ocean Engineering Associates, Incorporated
• Corporate Contributors:
  United States. Federal Highway Administration ; Louisiana. Dept. of Transportation and Development
• Subject/TRT Terms:
  • Coasts
  • Bridges
  • Storm surges
  • Hurricanes
  • Water waves
  • Wave height
  • Geographic information systems
  • Bearing capacity
• Publication/ Report Number:
  FHWA/LA.528
• Resource Type:
  Tech Report
• Geographical Coverage:
  Louisiana
• Corporate Publisher:
  Louisiana Transportation Research Center
• Abstract:
  This report summarizes the work performed by Ocean Engineering Associates, Inc. (OEA), a division ; of INTERA Inc. (OEA/INTERA), for Louisiana Department of Transportation and Development ; (DOTD) on (1) the development of a Wave and Surge Atlas for coastal Louisiana and (2) the ; determination of the vulnerability of selected DOTD coastal bridges to design storm surge and wave ; loads. In this study, the bridge is considered to be vulnerable if the surge/wave forces and moments ; (with the appropriate load factors) exceed the resistive forces and moments created by the dead weight ; of the superstructure for any of the spans. A Level III storm surge/wave analysis was performed to ; provide the design water level and wave parameters needed to compute the loads. This analysis entailed ; (1) the hindcasting of 50 of the most severe tropical storms and hurricanes that have affected Louisiana ; coastal waters over the past 160 years, and (2) performing extreme value analyses on water elevation ; and wave heights throughout the area covered by the model to obtain 100-year design met/ocean ; conditions. To increase the data set for the extreme value analyses, a select number of the hindcasted ; storm paths were shifted to the right and left of the actual path and the modified-path storms ; hindcasted. This resulted in 124 hindcasts to perform. The results from the extreme value analyses were ; used to create a Wave and Surge Atlas. The atlas is presented in a GIS database for ease of access and ; use. The information in the GIS database has many applications beyond that of providing the ; conditions needed for computation of surge/wave loads on the bridge superstructures.
  More +
• Format:
  PDF
• Funding:
  LRTC No. 10-4ST ; SIO No. 30000118
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28639/dot_28639_DS1.pdf
• File Type:
  [PDF - 13.14 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:58f26b64bdb08694b7ade416c6910122eefee8ac9a5a40f6e9dce7e4369b8923