In this paper, a three-dimensional poro-elastoplastic model for the short-crested wave-induced pore pressures ina porous seabed is presented. Unlike the previous models, both elasticity and plasticity of seafloor are considered in thepresent model. This study considers the effects of wave and soil characteristics on the pore pressures and was validatedwith the previous wave experiment data. As the numerical analysis shows, higher value of plastic parameter leads to afaster residual pore pressure accumulation, which is closely related to the occurrence of seabed liquefaction. In particular,at the dissipation stage, residual pore pressure sharply decreases when enlarging plastic parameter , which dominates thevelocity of accumulation of plastic volumetric strain.
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