An approach, capable of synthesising strong ground motion form a basic understanding of fault mechanism and of seismic wave propagation in the Earth, is applied to model the seismic input at a set of 25 sites along a chosen profile at Russe, Ne Bulgaria, due to two intermediate-depth Vrancea events (August 30, 1986, Mw=7.2, and May 30, 1990 Mw=6.9). Accordingly to our results, once a strong ground motion parameter has been selected its values and the features of the earthquake source, the path to the site and the nature of the site. Therefore, a proper seismic hazard assessment requires an appropriate parametric study to define the different ground shaking scenarios corresponding to the relevant seismogenic zones affecting the give site. Site response assessment is provided simultaneously in frequency and space domains, and thus the applied procedure differs from the traditional engineering approach that discusses the site as a single point. The applied procedure can be efficiently, urban planning, retrofitting or insurance of the built environment.
Modelling of the ground motion at Russe site (NE Bulgaria) due to the Vrancea earthquakes
KOUTEVA, MIHAELA;PANZA, GIULIANO;ROMANELLI, Fabio;
2004-01-01
Abstract
An approach, capable of synthesising strong ground motion form a basic understanding of fault mechanism and of seismic wave propagation in the Earth, is applied to model the seismic input at a set of 25 sites along a chosen profile at Russe, Ne Bulgaria, due to two intermediate-depth Vrancea events (August 30, 1986, Mw=7.2, and May 30, 1990 Mw=6.9). Accordingly to our results, once a strong ground motion parameter has been selected its values and the features of the earthquake source, the path to the site and the nature of the site. Therefore, a proper seismic hazard assessment requires an appropriate parametric study to define the different ground shaking scenarios corresponding to the relevant seismogenic zones affecting the give site. Site response assessment is provided simultaneously in frequency and space domains, and thus the applied procedure differs from the traditional engineering approach that discusses the site as a single point. The applied procedure can be efficiently, urban planning, retrofitting or insurance of the built environment.Pubblicazioni consigliate
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