Numerical Study on Wave-Induced Oscillatory Liquefaction in Anisotropic Seabed

DUAN Lunliang; ZHENG Dongsheng; WANG Shaohua; ZHANG Qibo

doi:10.3969/j.issn.0258-2724.20170810

Volume 54 Issue 4

Jul. 2019

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Journal of Southwest Jiaotong University > 2019 > 54(4): 741-747.

DUAN Lunliang, ZHENG Dongsheng, WANG Shaohua, ZHANG Qibo. Numerical Study on Wave-Induced Oscillatory Liquefaction in Anisotropic Seabed[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 741-747. doi: 10.3969/j.issn.0258-2724.20170810

Citation:

DUAN Lunliang, ZHENG Dongsheng, WANG Shaohua, ZHANG Qibo. Numerical Study on Wave-Induced Oscillatory Liquefaction in Anisotropic Seabed[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 741-747. doi: 10.3969/j.issn.0258-2724.20170810

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Numerical Study on Wave-Induced Oscillatory Liquefaction in Anisotropic Seabed

doi: 10.3969/j.issn.0258-2724.20170810

Received Date: 13 Nov 2017
Rev Recd Date: 13 Sep 2018

Available Online: 06 Mar 2019

Publish Date: 01 Aug 2019

Abstract

Abstract

In order to investigate the wave-induced oscillatory liquefaction in an anisotropic seabed, a two-dimensional numerical model for wave-seabed interactions is proposed. The reynolds-averaged navier-stokes (RANS) equation with the standard k-ε turbulence model was used to describe wave motions, and Biot’s poro-elastic equation was taken as the governing equation for the seabed model. After validation with previous experimental data and analytical solution, the proposed model was further applied to investigate the effects of wave and soil characteristics on anisotropic soil liquefaction. Numerical results show that the maximum liquefaction depth increased with an increase in wave height and wave period, and decreased with the degree of soil saturation. When the value of the soil permeability coefficient along the vertical direction is within a certain range, the effects of soil permeability along the vertical direction on the wave-induced soil response are obvious. Beyond the range, however, the effects of soil permeability along the vertical direction are almost negligible. Besides, the wave-induced oscillatory liquefaction depth in an anisotropic seabed is not sensitive to the variations in soil permeability along the horizontal direction.
- liquefaction,
- RANS equation,
- Biot’s equation,
- seabed,
- anisotropy

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References

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Numerical Study on Wave-Induced Oscillatory Liquefaction in Anisotropic Seabed

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