Numerical Analyses for Dynamic Response of Clayey Seabed under Wave Loading

The effect of dynamic response of clayey seabed on the stability of marine structures under wave loading is appreciably large.Based on the FEM software ABAQUS,the lateral boundary in the FE model is set up according to repeatability principle,and the clayey soil is simulated by utilizing the improved Cam-clay dynamic constitutive model proposed by Carter et al (1982).Compared with the relevant analytical solutions for behavior of elastic seabed under wave loading,the present FE model was validated firstly.Then,the parametric studies are conducted to explore the effect of some factors,such as wave height,wave period and permeability coefficient etc.on the dynamic response of elasto-plastic clayey seabed.The computational results indicate that the clayey seabed tends to instability more likely under the conditions of larger height wave,shorter wave period and lower permeability coefficient.