Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지
DOI QR코드

DOI QR Code

3-D Dynamic Response Characteristics of Seabed around Composite Breakwater in Relation to Wave-Structure-Soil Interaction

파랑-구조물-지반 상호작용에 의한 혼성제 주변 해저지반의 3차원 동적응답 특성

  • Hur, Dong-Soo (Department of Ocean Civil Engineering, Gyeongsang National University) ;
  • Park, Jong-Ryul (Disaster Information Research Division, National Disaster Management Research Institute) ;
  • Lee, Woo-Dong (Institute of Marine Industry, Gyeongsang National University)
  • 허동수 (국립경상대학교 해양토목공학과) ;
  • 박종률 (국립재난안전연구원 재난정보연구실) ;
  • 이우동 (국립경상대학교 해양산업연구소)
  • Received : 2016.07.22
  • Accepted : 2016.12.16
  • Published : 2016.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

If the seabed is exposed to high waves for a long period, the pore water pressure may be excessive, making the seabed subject to liquefaction. As the water pressure change due to wave action is transmitted to the pore water pressure of the seabed, a phase difference will occur because of the fluid resistance from water permeability. Thus, the effective stress of the seabed will be decreased. If a composite breakwater or other structure with large wave reflection is installed over the seabed, a partial standing wave field is formed, and thus larger wave loading is directly transmitted to the seabed, which considerably influences its stability. To analyze the 3-D dynamic response characteristics of the seabed around a composite breakwater, this study performed a numerical simulation by applying LES-WASS-3D to directly analyze the wave-structure-soil interaction. First, the waveform around the composite breakwater and the pore water pressure in the seabed and rubble mound were compared and verified using the results of existing experiments. In addition, the characteristics of the wave field were analyzed around the composite breakwater, where there was an opening under different incident wave conditions. To analyze the effect of the changed wave field on the 3-D dynamic response of the seabed, the correlation between the wave height distribution and pore water pressure distribution of the seabed was investigated. Finally, the numerical results for the perpendicular phase difference of the pore water pressure were aggregated to understand the characteristics of the 3-D dynamic response of the seabed around the composite breakwater in relation to the water-structure-soil interaction.

Keywords

References

  1. Ergun, S., 1952. Fluid Flow through Packed Columns. Chemical Engineering Progress, 48(2), 89-94.
  2. Hur, D.S., Kim, C.H., Kim, D.S., Yoon, J.S., 2008a. Simulation of the Nonlinear Dynamic Interactions between Waves, a Submerged Breakwater and the Seabed. Ocean Engineering, 35, 511-522. https://doi.org/10.1016/j.oceaneng.2007.12.002
  3. Hur, D.S., Lee, K.H., Yeom, G.S., 2008b. The Phase Difference Effects on 3-D Structure of Wave Pressure Acting on a Composite Breakwater. Ocean Engineering, 35, 1826-1841. https://doi.org/10.1016/j.oceaneng.2008.08.019
  4. Hur, D.S., Lee, W.D., Bae, K.S., 2008c. On Reasonable Boundary Condition for Inclined Seabed/structure in Case of the Numerical Model with Quadrilateral Mesh System. Journal of Korean Society of Civil Engineers, KSCE, 28, 591-594 (in Korean).
  5. Hur, D.S., Kim, C.H., Yoon, J.S., 2010. Numerical Study on the Interaction among a Nonlinear Wave, Composite Breakwater and Sandy Seabed. Coastal Engineering, 57, 917-930. https://doi.org/10.1016/j.coastaleng.2010.05.010
  6. Hur, D.S., Lee, W.D., 2007. Three-Dimensional Flow Characteristics and Wave Height Distribution around Permeable Submerged Breakwaters; PART I- without Beach. Journal of the Korean Society of Civil Engineer, 28(3B), 345-354(in Korean).
  7. Hur, D.S., Lee, W.D., Cho, W.C., 2012. Three-dimensional Flow Characteristics around Permeable Submerged Breakwaters with Open Inlet. Ocean Engineering, 44, 100-116. https://doi.org/10.1016/j.oceaneng.2012.01.029
  8. Hur, D.S., Park, J.R., Lee, W.D., 2014. 3D Characteristics of Dynamic Response of Seabed around Submerged Breakwater Due to Wave Loading. Journal of ocean engineering and technology, 28(4), 331-337(in Korean). https://doi.org/10.5574/KSOE.2014.28.4.331
  9. Liu, S., Masliyah, J.H., 1999. Non-iinear Flows in Porous Media. J. Non-Newtonian Fluid Mech., 86, 229-252. https://doi.org/10.1016/S0377-0257(98)00210-9
  10. Kirca, V., Sumer, B., Fredsoe, J., 2013. Residual Liquefaction of Seabed under Standing Waves. Journal of Waterway, Port, Coastal, and Ocean Engineering, ASCE, 139, 489-501. https://doi.org/10.1061/(ASCE)WW.1943-5460.0000208
  11. Mostafa, A.M., Mizutani, N., Iwata, K., 1999. Nonlinear Wave, Composite Breakwater and Seabed Dynamic Interaction. Journal of Waterway, Port, Coastal, and Ocean Engineering, ASCE, 125, 88-97. https://doi.org/10.1061/(ASCE)0733-950X(1999)125:2(88)
  12. Jeng, D.S., Li, J., 2008. Response of Porous Seabed around Breakwater Heads. Ocean Eng., 35, 864-886. https://doi.org/10.1016/j.oceaneng.2008.01.021
  13. Sakakiyama, T., Kajima, R., 1992. Numerical Simulation of Nonlinear Wave Interacting with Permeable Breakwater. Proceedings of the 23rd The International Conference on Coastal Engineering, ASCE, 1517-1530.
  14. Smagorinsky, J., 1963. General Circulation Experiments with the Primitive Equation. Monthly Weather Review, 91(3), 99-164. https://doi.org/10.1175/1520-0493(1963)091<0099:GCEWTP>2.3.CO;2
  15. Sumer, B.M., Fredsoe, J., 2002. The Mechanics of Scour in the Marine Environment. World Scientific, Advanced Series on Ocean Engineering, 17, 552.
  16. Ulker, M.B.C., Rahman, M.S., Guddati, M.N., 2010. Wave- induced Dynamic Response and Instability of Seabed around a Breakwater. Ocean Engineering, 37, 1522-1545. https://doi.org/10.1016/j.oceaneng.2010.09.004
  17. Ulker, M.B.C., 2014. Dynamic Respones of Seabed-Rubble Mound Breakwater System under Seismic Waves. 2nd European World Conference on Earthquake Engineering, 25-29.
  18. Yang, S., 2013. Comparison Study on the Residual Excess Pore Water Pressure Observed in Seabed. Journal of Navigation and Port Research, 37(2), 173-179(in Korean). https://doi.org/10.5394/KINPR.2013.37.2.173
  19. Ye, J., Wang. G., 2015. Seismic Dynamics of Offshore Breakwater Onliquefiable Seabed Foundation. Soil Dynamic sand Earthquake Engineering, 76, 86-99. https://doi.org/10.1016/j.soildyn.2015.02.003