The authors describe investigations carried out to design for the wave action on large offshore berthing structures sited approximately 2.1 km offshore near Hay Point, North Queensland, in 17 m of water at low tide, the tidal range being 6 m. The region is a cyclone area and the structures have to be capable of withstanding attack from maximum predicted waves with a period of 8.5 sec and amplitude of 7.3 m. The main units in the berthing structures are concrete caissons sunk on the ocean bed, the largest having plan dimensions of approximately 46.7 x 41.4 m, with four columns approximately 12.2 m square projecting through the water surface. No theoretical method available at the time of the investigation was capable of accurate calculation of wave forces on these structures. A scale model was tested to obtain wave forces and the paper compares results from the model with those of numerical methods. Scour effects were also modelled and the results used as the basis for design of scour protection. Order from BSRA as No. 50,043.

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    Marine Technology Society

    5565 Sterrett Place, Suite 108
    Columbia, MD  United States  21044
  • Authors:
    • APELT, C J
    • Macknight, A
  • Publication Date: 1978-6

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Filing Info

  • Accession Number: 00194247
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jun 13 1979 12:00AM