Abstract : A computationally efficient procedure for the linear earthquake analysis of structure-foundation systems is developed, which is specially suited to finite element solutions of complex shaped structures on large, layered foundations. The procedure is very general in scope, being applicable to a large variety of structure-foundation interaction problems. An explicit formulation of the procedure is presented for a plane strain idealization of a dam foundation system. The procedure utilizes a substructure approach. The foundation is analyzed first, independently of the structure, to obtain its frequency dependent compliance characteristics at the connection nodes with the structure. Equations of motion for the structure are then written in the frequency domain incorporating the effect of the foundation, the input to the problem being the freefield motion of the structural base. The substructure approach allows a more detailed modelling of the structure. (Modified author abstract)
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