Nonuniform earthquake input for arch dam-foundation interaction

Wave scattering and dam-foundation interaction are important aspects of a r ealistic earthquake analysis of arch dams. In the first part of this paper it is shown how the motion obtained from a two-dimensional scattering analy sis can be used as an input for a three-dimensional dam-foundation analysis . In the second part, a method for calculating the scattered motion is expl ained. The scattered motion is obtained via the two-dimensional dynamic sti ffness matrix. The dynamic stiffness matrix for an out-of-plane motion is c alculated by the Complementary-Domain Method (CDM). Some examples are prese nted to verify the method and to show the influence of the scattering of th e seismic ground motion. (C) 1999 Elsevier Science Ltd. All rights reserved .