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Effect of Wave Nonlinearity on the Instantaneous Seabed Liquefaction

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The nonlinear variation of wave is commonly seen in nearshore area,and the resulting seabed response and liquefaction are of high concern to coastal engineers.In this study,an analytical formula considering the nonlinear wave skewness and asymmetry is adopted to provide wave pressure on the seabed surface.The liquefaction depth attenuation coefficient and width growth coefficient are defined to quantitatively characterize the nonlinear effect of wave on seabed lique-faction.Based on the 2D full dynamic model of wave-induced seabed response,a detailed parametric study is carried out in order to evaluate the influence of the nonlinear variation of wave loadings on seabed liquefaction.Further,new empirical prediction formulas are proposed to fast predict the maximum liquefaction under nonlinear wave.Results indicate that(1)Due to the influence of wave nonlinearity,the vertical transmission of negative pore water pressure in the seabed is hindered,and therefore,the amplitude decreases significantly.(2)In general,with the increase of wave nonlinearity,the liquefaction depth of seabed decreases gradually.Especially under asymmetric and skewed wave loading,the attenuation of maximum seabed liquefaction depth is the most significant among all the nonlinear wave conditions.However,highly skewed wave can cause the liquefaction depth of seabed greater than that under linear wave.(3)The asymmetry of wave pressure leads to the increase of liquefaction width,whereas the influence of skewedness is not significant.(4)Compared with the nonlinear waveform,seabed liquefaction is more sensitive to the variation of nonlinear degree of wave loading.

nonlinear waveseabed responseseabed liquefactionnumerical simulationliquefaction prediction

WANG Zhao-jun、SUI Ti-ti、ZHANG Chi、PAN Jun-ning

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Key Laboratory of Port,Waterway and Sedimentation Engineering of the Ministry of Transport,Nanjing Hydraulic Research Institute,Nanjing 210024,China

Key Laboratory of Coastal Disaster and Protection(Hohai University),Ministry of Education,Nanjing 210098,China

The National Key Laboratory of Water Disaster Prevention,Nanjing 210098,China

国家重点研发计划国家重点研发计划Central Public-Interest Scientific Institution Basal Research Fund国家自然科学基金Key Laboratory of Ministry of Education for Coastal Disaster and Protection,Hohai UniversityKey Project of National Natural Science Foundation of China-Shandong Joint Research Funding POW3C

2021YFB26007002022YFC3102302Y22100752271274202205U1906230

2024

10.1007/s13344-024-0008-z

中国海洋工程(英文版)
中国海洋学会

中国海洋工程(英文版)

CSTPCDEI
影响因子：0.338
ISSN：0890-5487
年,卷(期)：2024.38(1)
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