PRELIMINARY DESIGN FOR AN OFFSHORE GRAVITY-TYPE STRUCTURE

The purpose is to develop a method suitable for the preliminary design of gravity-type structures. The study starts with a brief survey of existing and proposed offshore gravity structures. This introduction is followed by a design method which will allow the user to generate a preliminary design of a gravity-type structure that satisfies a given set of owner's requirements. This methodology is then followed by a detailed discussion on the soil properties, environmental loads and structural analysis to be used in conjunction with the proposed design methodology. The discussion on the soil properties includes consideration of bearing capacity, horizontal sliding and structure settlement. The environmental loads considered were due to waves, current, wind and ice. The structural analysis shows how to estimate the thickness and strengthening of the main components of the structure, i.e. the main deck, columns, oil storage and foundation. The proposed methodology is then applied to the design of a multipurpose offshore gravity platform fulfilling the following owner's requirements: Oil Storage Terminal (2.5 x 10 to 6th power Barrels); Slurry Storage (70,000 long tons); Power and Fresh Water Generation to Sustain the Platform Operation; and Ammonia Fertilizer Plant.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Department of Ocean Engineering, 77 Massachusetts Avenue
    Cambridge, MA  United States  02139
  • Authors:
    • Abramovich, D
  • Publication Date: 1975-5-21

Subject/Index Terms

Filing Info

  • Accession Number: 00099988
  • Record Type: Publication
  • Source Agency: Massachusetts Institute of Technology
  • Report/Paper Numbers: MS Thesis
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM