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http://dx.doi.org/10.9765/KSCOE.2016.28.4.177

Irregular Waves-Induced Seabed Dynamic Responses around Submerged Breakwater  

Lee, Kwang-Ho (Dept. of Energy Resources and Plant Eng., Catholic Kwandong University)
Ryu, Heung-Won (Dept. of Civil and Environmental Eng., Graduate School, Korea Maritime and Ocean University)
Kim, Dong-Wook (Dept. of Civil and Environmental Eng., Graduate School, Korea Maritime and Ocean University)
Kim, Do-Sam (Dept. of Civil Eng., Korea Maritime and Ocean Univ.)
Kim, Tae-Hyung (Dept. of Civil Eng., Korea Maritime and Ocean Univ.)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.28, no.4, 2016 , pp. 177-190 More about this Journal
Abstract
In case of the seabed around and under gravity structures such as submerged breakwater is exposed to a large wave action long period, the excess pore pressure will be generated significantly due to pore volume change associated with rearrangement soil grains. This effect will lead a seabed liquefaction around and under structures as a result from decrease in the effective stress. Under the seabed liquefaction occurred and developed, the possibility of structure failure will be increased eventually. Lee et al.(2016) studied for regular waves, and this study considered for irregular waves with the same numerical analysis method used for regular waves. Under the condition of the irregular wave field, the time and spatial series of the deformation of submerged breakwater, the pore water pressure (oscillatory and residual components) and pore water pressure ratio in the seabed were estimated and their results were compared with those of the regular wave field to evaluate the liquefaction potential on the seabed quantitatively. Although present results are based on a limited number of numerical simulations, one of the study's most important findings is that a more safe design can be obtainable when analyzing case with a regular wave condition corresponding to a significant wave of irregular wave.
Keywords
submerged breakwater; irregular waves; pore water pressure(oscillatory and residual components); pore water pressure ratio; liquefaction;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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1 Hirt, C.W. and Nichols, B.D. (1981). Volume of fluid(VOF) method for the dynamics of free boundaries, J. of Computational Physics, 39, 201-225.   DOI
2 lai, S., Matsunaga, Y. and Kameoka, T. (1992a). Strain space plasticity model for cyclic mobility, Soils and Foundations, Japanese Society of Soil Mechanics and Foundation Eng., 32(2), 1-15.
3 Iai, S., Matsunaga, Y. and Kameoka, T. (1992b). Analysis of undrained cyclic behavior of sand under anisotropic consolidation, Soils and Foundation, Japanese Society of Soil Mechanics and Foundation Eng., 32(2), 16-20.
4 Jeng. D.S., Ye, J.H., Zhang, J.S. and Liu, P.F. (2013). An integrated model for the wave-induced seabed response around marine structures : Model verifications and applications. Coastal Engineering, 72, 1-19.   DOI
5 Lee, K.H., Baek, D.J., Kim, D.S., Kim, T.H. and Bae, K.S. (2014). Numerical Simulation of Dynamic Response of Seabed and Structure due to the Interaction among Seabed, Composite Breakwater and Irregular Wave (II). J. of Korean Society of Coastal and Ocean Engineers, 26(3), 174-183 (in Korean).   DOI
6 Lee, K.H., Park, J.H., Cho, S. and Kim, D.S. (2013). Numerical simulation of irregular airflow in OWC generation system considering sea water exchange, J. of Korean Society of Coastal and Ocean Engineers, 25(3), 128-137 (in Korean).   DOI
7 Lee, K.H., Park, J.H. and Kim, D.S. (2012). Numerical simulation of irregular airflow within wave power converter using OWC by action of 3-dimensional irregular waves, J. of Korean Society of Coastal and Ocean Engineers, 24(3), 189-202 (in Korean).   DOI
8 Lee, K.H., Ryu, H.W., Kim, D.W., Kim, D.S. and Kim, T.H. (2016). Regular Waves-induced Seabed Dynamic Responses around Submerged Breakwater, J. of Korean Society of Coastal and Ocean Engineers, 28(3), 132-145 (in Korean).   DOI
9 Mizutani, N., Mostafa, A.M. and Iwata, K. (1998). Nonlinear regular wave, submerged breakwater and seabed dynamic interaction. Coastal Engineering, 33, 177-202.   DOI
10 Morita, T., Iai, S., Hanlong, L., Ichii, Y. and Satou, T. (1997). Simplified set-up method of various parameters necessary to predict liquefaction damage of structures by FLIP program, Technical Note of the Port and Harbour Research Institute Ministry of Transport, PARI, Japan, 869, 1-36.
11 Sakakiyama, T. and Kajima, R. (1992). Numerical simulation of nonlinear wave interaction with permeable breakwater, Proceedings of the 22nd ICCE, ASCE, 1517-1530.
12 Sumer, B.M. and Cheng, N.S. (1999). A random-walk model for pore pressure accumulation in marine soils, Proceedings of the 9th International Offshore and Polar Engineering Conference, ISOPE-99, Brest, France, 1, 521-526.
13 Xu, H. and Dong, P. (2011). A probabilistic analysis of random wave-induced liquefaction, Ocean Engineering, 38(7), 860-867.   DOI
14 Dong, P. and Xu, H. (2010). An ensemble modelling for the assessment of random wave-induced liquefaction risks, Abstract Book of the 32nd International Conference on Coastal Engineering, ICCE 2010, Paper No. 214.
15 CDIT (2001). Research and development of numerical wave channel(CADMAS-SURF), CDIT library, 12.
16 Chen, Y.L., Tzang, S.Y. and Ou, S.H. (2008). Application of the EEMD method to investigate pore pressure buildups in a wavefluidized sandbed, Proceedings of the 31st International Conference on Coastal Engineering, 2, 1614-1624.
17 De Groot, M.B., Kudella, M., Meijers, P. and Oumeraci, H. (2006). Liquefaction phenomena underneath marine gravity structures subjected to wave loads, J. Waterway, Port, Coastal, Ocean Eng., ASCE, 132(4), 325-335.   DOI
18 Goda, Y. (2010). Random seas and design of maritime structures, World Scientific.