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http://dx.doi.org/10.9765/KSCOE.2017.29.1.20

Numerical Analysis on Liquefaction Countermeasure of Seabed under Submerged Breakwater Using Concrete Mat Cover (for Irregular Waves)  

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.29, no.1, 2017 , pp. 20-35 More about this Journal
Abstract
In the 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 significantly generated due to pore volume change associated with rearrangement soil grains. This effect will lead a seabed liquefaction around and under structures as a result of the decrease in the effective stress, and eventually the possibility of structure failure will be increased. The study of liquefaction potential for regular waves had already done, 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 safer design can be obtained when analyzing case with a regular wave condition corresponding to a significant wave of the irregular wave.
Keywords
submerged breakwater; seabed; liquefaction; concrete mat; pore water pressure ratio; dynamic response; irregular waves;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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1 Hsu, T.J., Sakakiyama, T., and Liu, P.L.F. (2002). A numerical model for wave motions and turbulence flows in front of a composite breakwater. Coastal Engineering, 46(1), 25-50.   DOI
2 Iai, 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., 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
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., Ryu, H.W., Kim, D.W, Kim, D.S. and Kim, T.H. (2016a). 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
8 Lee, K.H., Ryu, H.W., Kim, D.W, Kim, D.S. and Kim, T.H. (2016b). Irregular waves-induced seabed dynamic responses around submerged breakwater, J. of Korean Society of Coastal and Ocean Engineers, 28(4), 177-190 (in Korean).   DOI
9 Lee, K.H., Ryu, H.W., Kim, D.W, Kim, D.S. and Kim, T.H. (2016c). Numerical analysis on liquefaction countermeasure of seabed under submerged breakwater using concrete mat cover (for regular waves), J. of Korean Society of Coastal and Ocean Engineers, 28(6), 361-374 (in Korean).   DOI
10 Losada, I.J., Silva, R. and Losada, M.A. (1996). 3-D non-breaking regular wave interaction with submerged breakwaters, Coastal Engineering, 28, 229-248.   DOI
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 Mitsuyasu, H. (1970). On the growth of spectrum of wind-generated waves (2)-spectral shape of wind waves at finite fetch, Proc. 17 th Japanese Conf. Coastal Eng., 1-7 (in Japanese).
13 Mizutani, N., Mostafa, A.M. and Iwata, K. (1998). Nonlinear regular wave, submerged breakwater and seabed dynamic interaction. Coastal Engineering, 33, 177-202.   DOI
14 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.
15 Sekiguchi, H., Sassa, S., Miyamoto, J. and Sugioka, K. I. (2000). Wave-induced liquefaction, flow deformation and particle transport in sand beds, ISRM International Symposium, International Society for Rock Mechanics.
16 Sumer, B. M., Dixen, F. H. and Fredsoe, J. (2010). Cover stones on liquefiable soil bed under waves. Coastal Engineering, 57(9), 864-873.   DOI
17 Yasuda, S. (1988). From investigation to countermeasure for liquefaction, Kajima Press, 256p (in japanese).
18 Goda, Y. (2010). Random seas and design of maritime structures, World Scientific.
19 Biot, M.A. (1941). General theory of three-dimensional consolidation, J. of Applied Physics, 12, 155-165.   DOI
20 CDIT(2001). Research and development of numerical wave channel( CADMAS-SURF), CDIT library, 12.
21 Godbold, J., Sackmann, N. and Cheng, L. (2014). Stability design for concrete mattresses, Proceedings of 24 th International Ocean and Polar Engineering Conference, ISOPE, 302-308.
22 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