GNGTS 2013 - Atti del 32° Convegno Nazionale

attenuation equation for , transforming it into a site-specific soil-attenuation equation (Bazzurro and Cornell, 2004b). Before presenting hazard calculations, the study gives a simplified description of the region under study from a geological standpoint and presents results of the ground response analyses performed as a preliminary step to hazard computation. Geological characterization and soil modeling. The collection of geological, geotechnical and geophysical data is the first step to build subsoil models, the basic ingredients that allow the realization of prototypes of site-dependent seismic hazard estimates. The goal of this activity was to coagulate information in sample areas in the Po Valley, northern Italy, at different scale and level of detail. This activity led to devising 31 seismo-stratigraphic columns/models for 1D-to-3D seismic response analyses. Data were collected in the Lombardy region (Soncino Tab. 2 – Soil profile parameterization: V S indicates the shear wave velocity, h the soil thickness, and γ the unit weight. The uncertainty affecting each random variable (expressed in terms of standard deviation) is given in brackets. Models S1 and S2 have been used for Mirandola (Model S1 is a simplification of Model S2), S3 for Casaglia, and S4 for Soncino. 17 GNGTS 2013 S essione 2.1