Soil Dynamics and Earthquake Engin n e

a the Jan r s apparent building–foundation–soil system frequency changes due to water saturation. The model consists of a shear wall supported by a rigid circular foundation embedded in a homogenous, isotropic poroelastic half-space, fully saturated by a compressible and inviscid interaction are based on equivalent single-phase material models of the soil, two-phase models are not uncommon. number of investigators, mostly for vertical motions [5–18]. To the knowledge of the authors, the only such published study for embedded foundation is that of Senjuntichai et al. companion paper [20], we consider embedded two-dimen-sional (2D) foundations, with circular arc cross-section, pore fluid on the horizontal stiffness. While for surface footings this effect on the horizontal stiffness has been considered less significant (and often omitted from the ARTICLE IN PRESSanalysis), our results will show that for embedded footings this effect is comparable to the effect on the vertical and rocking stiffness. Biot’s original theory [2] and all of th