3D Modeling of Site Amplification Induced by Surface Waves and Base Rock Interaction

Surface geology, geotechnical characteristics of soil deposits and surface topography have a paramount effect on seismic ground motion. Seismic amplification of ground motion is controlled by source, seismic ray-path, topographic effects, dispersion and attenuation. Generally, amplitude, frequency and duration characteristics of the surface waves may change due to geometrical features of soil deposits, surface topography, dispersion and attenuation. In this study, effects of the 1) base-rock topography, 2) dispersion and 3) attenuation of surface waves were modeled and the results were compared with the actual blasting data.