Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Estimation on the Wave Transmission and Stability/Function Characteristics of the Submerged Rubble-Mound Breakwater

수중 잠제구조물의 파랑 전달율과 안정성 및 기능성 평가

  • KIM Yong Woo (Department of Ocean Engineering, Pukyong National University) ;
  • YOON Han Sam (Department of Ocean Engineering, Pukyong National University) ;
  • RYU Cheong Ro (Department of Ocean Engineering, Pukyong National University) ;
  • SOHN Byung Kyu (National Fisheries Research & Development Institute)
  • Published : 2003.10.01
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Abstract

The 2-D hydraulic experimental results for the submerged rubble-mound structure, we have been concerned with the slability/function characteristics of the structures by the effects of wave force, scour/deposition at the toe and the wave transmission ratio at the lee-side sea. So, to investigate the variation characteristics of the wave transmission ratio which depended on a geometrical structure of the submerged breakwater profiles, the critical conditions for the depth of submergence and crest width were obviously presented. In summary, the results lead us to the conclusion that the wave control capabilities of submerged breakwaters by the variation of the submergence depth is higher than about 4 times the degree at the efficiency than the that of crest width. The destruction of the covering block at the crest generated at the region which was located between the maximum and minimum damage curve, and it's maximum damage/failure station from the toe of the structure was $0.2\;L_s.$ As the wave transmission coefficient and the slope of the structure increase, the damage/failure ratio and the maximum scour depth at the toe was extended, respectively. When the maximum scour depth happened, the destruction of the covering block which was located at the toe generated at the front of the submerged rubble-mound breakwater. Finally, it was found from the results that the optimization of the structure may be obtained by the efficient decision of the submergence depth and crest width in the permissible range of the wave transmission ratio.

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References

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