BREAKWATER ARMOUR DAMAGE DUE TO WAVE GROUPS

The effects of wave groups on damage to the armour layer for non-overtopped, rubble mound breakwaters were analyzed by a large-scale experiment. Two independent wave grouping parameters were evaluated in the experiment: (1) The mean run length correlated with the spectral peakedness parameter ; and (2) an envelope exceedance coefficient alpha correlated with a wave height function H(x, t). The observed damage levels of the armour layer were found to be correlated with alpha; on the contrary, no significant correlation was found between armour damage and spectral peakedness parameter , or mean run length. Because only 224 damage observations were obtained, the experiment did not allow for a complete and reliable modelling of the armour response under wave group attack. The positive correlation between the envelope exceedance coefficient alpha with armour damage may be of the same order of magnitude as the storm duration, and should be considered in both preliminary designs and in analyses of experimental data for armour damage from random waves.

  • Supplemental Notes:
    • J Waterway Port Coastal Ocean Engng, v 120 n 2, March/April 1994, p 179 [20 p, 35 ref, 2 tab, 6 fig]
  • Authors:
    • Medina, Joseph R
    • Hudspeth, R T
    • Fassardi, C
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00716124
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Feb 28 1996 12:00AM