摘要
Wave-induced transient response of displacements, effective stresses and pore pressure in saturate seabed are salved by a consolidation finite element method. The influence of the responses to the stability of seabed and coastal structures is shown by an improved slice method with circular arc slip surface. Dynamic elastic consolidation theory and linear permeability theory are employed in the solution of seabed response. The seabed can be consisted of layered soil with arbitrary boundaries. The acting wave can be regular or irregular . Irregular wave pressure acting on the surface of seabed is calculated by linear superposition method. Wave-induced excess stress on the slip surface is considered in the stability analysis. The spatial and temporal variations of pore pressure in sandy seabed compare well with experiment. Calculations for a vertical breakwater show that the safety factor of seabed and structure will decrease if wave-induced seabed response is considered. The scope of decrease is mainly
Wave-induced transient response of displacements, effective stresses and pore pressure in saturate seabed are salved by a consolidation finite element method. The influence of the responses to the stability of seabed and coastal structures is shown by an improved slice method with circular arc slip surface. Dynamic elastic consolidation theory and linear permeability theory are employed in the solution of seabed response. The seabed can be consisted of layered soil with arbitrary boundaries. The acting wave can be regular or irregular . Irregular wave pressure acting on the surface of seabed is calculated by linear superposition method. Wave-induced excess stress on the slip surface is considered in the stability analysis. The spatial and temporal variations of pore pressure in sandy seabed compare well with experiment. Calculations for a vertical breakwater show that the safety factor of seabed and structure will decrease if wave-induced seabed response is considered. The scope of decrease is mainly related to wave amplitude and permeability of seabed soil. The influence of wave-induced seabed response on the stability of seabed and coastal structures can not be completely neglected.
