The present paper deals with the influence of soil non-linearity, on the soil-foundation-structure interaction phenomena. Numerical simulations are carried out so as to reveal the beneficial or unfavourable effects of the non-linear SSI on the assessing of damages of masonry structures. The impor
tance of input earthquake characteristics on the structural damages in the masonry structure is evaluated through a numerical pr obabilistic analysis. The influence of the inelastic behaviour of soil deposit on the amplification of ground seismic accelerations and on the soil-interaction effects is highlighted.