The physical understanding of ground/structure vibrational interaction is e
ssential in order to relate ground vibration levels outside buildings to st
ructural vibration levels in buildings. A 2-D FEM/BEM computer program has
been developed and is used to study the simple problem of surface excitatio
n of a single wall and its foundation. It gives some understanding for the
case of buildings parallel to nearby surface railway tracks. (C) 2000 Acade
mic Press.