Performance analysis of composite semicircular breakwaters of different configurations and porosities

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The perforated free surface semicircular breakwater developed by Teh et al. (2010) was experimentally proven to be an effective anti-reflection structure with high energy dissipation ability. However, the performance characteristics of the breakwater deteriorated with a decrease in the immersion depth and an increase in wavelength. To enhance the performance of the breakwater with limited immersion depth, wave screens of different configurations and porosities were introduced below the free surface semicircular caisson. The hydrodynamic characteristics of these composite breakwaters were investigated in irregular waves using physical modelling. Comparisons of the experimental results showed that the semicircular caisson with a double screen of 25% porosity was a better breakwater configuration compared to that with a single screen. The extension of wave screen was also found to be particularly helpful in attenuating longer waves.

Original languageEnglish
Title of host publicationProceedings of the 33rd International Conference on Coastal Engineering 2012, ICCE 2012
PublisherAmerican Society of Civil Engineers (ASCE)
Number of pages11
ISBN (Print)9780989661119
DOIs
Publication statusPublished - 25 Oct 2012
Event33rd International Conference on Coastal Engineering 2012, ICCE 2012 - Santander, Spain
Duration: 1 Jul 20126 Jul 2012

Publication series

NameProceedings of the Coastal Engineering Conference
ISSN (Print)0161-3782

Conference

Conference33rd International Conference on Coastal Engineering 2012, ICCE 2012
Country/TerritorySpain
CitySantander
Period1/07/126/07/12

Keywords

  • Energy dissipation
  • Free surface breakwater
  • Horizontal wave forces
  • Semicircular breakwater
  • Wave reflection
  • Wave screen
  • Wave transmission

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