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This article shows how seismic ground response is affected by the presence of a group of rigid inclusions embedded in deposits of soft Mexico City clay. The 3-D finite difference code FLAC3Dwas used to perform numerical analyses in which different configurations of inclusions were studied, including in some of them surface buildings, to incorporate important inertial effects. Results showed that inclusions, together with the surface structure, modify seismic ground response on account of soil-structure interaction. [ABSTRACT FROM PUBLISHER]