Dynamic soil-structure interaction applying a hybrid ITM/FEM approach

The paper deals with the prediction of vibrations caused by the passage of a train in a tunnel or trench. Superposing the fundamental solutions of the Integral Transform Method (ITM) for a uniform half-space and a full space with a cylindrical cavity the frequency/wave number impedances at the boundaries of geometrically ideal embedded structures (surfaces of the half-space, tunnel and/or trench) are derived. These impedances can be coupled with the Finite Element Method (FEM), so that arbitrary and complex structures of a tunnel/trench can be implemented.