IBEM-FEM model of the vibratory response of a buried, elastic strip footing

Resumo

This work investigates the dynamic response of an elastic, partially buried strip footing under vertical
and horizontal external time-harmonic loads. The footing is modeled as a two-dimensional embedded rectangle
discretized by a plane-strain isoparametric finite element. The soil is a two-dimensional, isotropic, viscoelastic
half-space modeled through an Indirect-Boundary Element formulation. Solutions for this medium are obtained
by superposition of Green’s functions for buried loads. Direct kinematic compatibility and equilibrium conditions
are used to couple the finite element mesh to the boundary element mesh, assuming perfectly bonded contact at
the foundation-soil interface. The effect of foundation embedment and elastic properties on the dynamic behavior
of the foundation is illustrated with selected numerical examples.