Development of wave and surge atlas for the design and protection of coastal bridges in South Louisiana - phase 2.
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Development of wave and surge atlas for the design and protection of coastal bridges in South Louisiana - phase 2.

Filetype[PDF-3.39 MB]


English
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  • Alternative Title:
    Development of wave and surge atlas for the design and protection of coastal bridges in South Louisiana - phase 2 : final report 568.
  • Creators:
  • Corporate Creators:
    INTERA, Inc.
  • Corporate Contributors:
    Louisiana. Department of Transportation and Development
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA/LA.16/568
  • Resource Type:
    Tech Report
  • Geographical Coverage:
  • Edition:
    Final report
  • Corporate Publisher:
    Louisiana Transportation Research Center
  • Abstract:
    This report summarizes the work performed by INTERA Incorporated (INTERA), for the Louisiana Department of Transportation and Development (DOTD) on Phase 2 of LTRC project No. 10-4ST, “Development of Wave and Surge Atlas for the Design Protection of Coastal Bridges in South Louisiana.” In Phase 1 (Louisiana Transportation Research Center (LTRC) project No. 10-4ST, Final Report 528), a Level III storm surge/wave analysis provided the design water level and wave parameters needed to compute wave loads. This analysis entailed (1) hindcasting 50 of the most severe tropical storms and hurricanes that have affected Louisiana coastal waters over the past 160 years including hindcasting alternative paths for a select number of those storms resulting in a total of 124 hindcasts, and (2) performing extreme value analyses on water elevation and wave heights throughout the area covered by the model to obtain 100-year design meteorological /oceanographic (met/ocean) conditions. The results from the extreme value analyses provided the data for the Wave and Surge Atlas. The atlas is presented in a geographic information system (GIS) database for ease of access and use. Those data provided the input to determine the vulnerability of selected DOTD coastal bridges to design storm surge and wave loads. This phase includes (1) developing parameters for additional return periods (5-, 10-, 25-, and 50-year) from the results of the hindcasted storms in Phase 1; (2) develop a Surge/Wave Atlas for maximum values of the actual hurricane/tropical storm-induced water elevation, wave height and peak period and wind speed for the study area over the past 160 years; (3) developing a Surge/Wave Atlas for maximum values of the actual + path shifted hurricane/tropical storm-induced water elevation, wave height and peak period, and wind speed for the study area over the past 160 years; (4) Developing an American Association of State Highway and Transportation Officials (AASHTO) Wave Load Calculation Program (Visual Basic Program) based on the AASHTO Guide Specifications [1]; (5) providing a training session for DOTD employees so that DOTD will be able to update or modify the program as needed for future code changes; and (6) computing the forces and moments on the remaining spans on the bridges determined to be vulnerable and generate PDF files of the bridge information and the forces and moments along the entire bridge, and adding PDF pop-ups to the locations of all bridges determined to be vulnerable.
  • Format:
    PDF
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