Effects of shallow and deep geology on seismic hazard estimates: a case study of pseudo-acceleration response spectra for the northwestern Balkans

摘要: Northwestern Balkans represents one of the rare regions where data on both shallow geology (i.e., local soil conditions) and deep exist for stations that recorded hundreds strong motion records. The database used in this study consists 203 accelerograms (each with three orthogonal translational components), former Yugoslavia period 1976–1983, from 108 contributing earthquakes. In paper, results a series regression analyses are presented empirical equations scaling pseudo-acceleration response spectra were developed basis 5 subsets using prediction models. Results show ground horizontal direction, site conditions have to be taken into account or else spectral estimates might considerably biased. influences amplitudes most short range has much lesser effects larger periods, while influence is expressed wider intermediate long periods. also if model considers solely used, peaks been related will completely vanish source-to-site distances, case when considered, not visible any distance. As vertical although less than one, they still cannot neglected—the vibration some only periods smaller ~0.3 s.