Poroelastic analysis for wave-seabed interaction problem

Abstract

The analysis of the wave-induced pore pressures and effective stresses in a poroelastic seabed has attracted attention from marine geotechnical and coastal engineers in recent years. However, to simplify the complicated problem, most previous investigations have been only concerned with the waves propagating over an isotropic seabed with uniform soil characteristics, ignoring the anisotropic soil behaviour and variable soil characteristics. This paper proposes a simple finite element model to investigate the wave-induced soil response in a cross-anisotropic seabed of finite thickness with variable soil permeability and Young's modulus. The numerical results indicate that the effects of anisotropic soil behaviour and variable soil characteristics on the wave-induced soil response can not always be ignored without substantial errors.