Abstract
Experiments were conducted to verify the validity of the BEM-FEM and poro-elastic FEM models, developed by the authors, for composite breakwaters. The BEM-FEM model is confirmed to predict well the wave field. The poro-elastic FEM model uses an equivalent nonlinear Darcy coefficient of permeability and runs under the surface pressure computed by the BEM-FEM model. The poro-elastic model computes the pore pressure in the porous media more accurately than the BEM-FEM model. The transmitted wave characteristics along with the dynamic behaviour of the composite breakwater and seabed are investigated. A study is conducted to find out the parameters causing a high pressure gradient at the offshore toe.
