Abstract
In this paper, a FE-BE procedure is implemented for dynamic analysis of concrete arch dams, which considers the effects of non-uniform ground motion. The technique relies on the finite element method for the discretization of the dam body, while the foundation rock domain is handled by three dimensional boundary element formulations with no restrictions imposed on the geometry of the canyon shape. A previously developed special purpose program is enhanced based on this approach and the response of the Morrow Point arch dam is studied as an example. The efficiency of the analysis is highly influenced by an interpolation scheme, which is used for evaluation of foundation impedance matrix and force vector. The convergence of this method is initially controlled for uniform, as well as non-uniform ground excitations. Subsequently, the effects of non-uniform ground motion are evaluated and discussed for vertically propagating SH, P and SV waves.
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