Ground motion modification over large areas is generally evaluated by focusing on sourceeffects disregarding local lithostratigraphic site conditions. Hence, amplification maps ofpeak ground acceleration and peak ground velocity are proposed to improve the forecast ofground motion on a national scale. Topological information about litho-type successionsand soil mechanical behaviour were retrieved from the Italian database of seismicmicrozonation and more than 30 million of seismic site response analyses were performedto quantify the amplification factors (i.e. the ratio between expected ground motion at thesite of interest and that at the outcropping engineering bedrock). The maximum value ofthe amplified peak ground acceleration on the Italian territory results in about twice asmuch as the value expected at the outcropping of the engineering bedrock. Finally, damagescenario maps based on the amplified ground motion could be produced as a supportingtool for urban planning and emergency system management.

Italian seismic amplification factors for peak ground acceleration and peak ground velocity

Amerigo Mendicelli;Gaetano Falcone;Gianluca Acunzo;Federico Mori;Edoardo Peronace;Attilio Porchia;Gino Romagnoli;Massimiliano Moscatelli
2022

Abstract

Ground motion modification over large areas is generally evaluated by focusing on sourceeffects disregarding local lithostratigraphic site conditions. Hence, amplification maps ofpeak ground acceleration and peak ground velocity are proposed to improve the forecast ofground motion on a national scale. Topological information about litho-type successionsand soil mechanical behaviour were retrieved from the Italian database of seismicmicrozonation and more than 30 million of seismic site response analyses were performedto quantify the amplification factors (i.e. the ratio between expected ground motion at thesite of interest and that at the outcropping engineering bedrock). The maximum value ofthe amplified peak ground acceleration on the Italian territory results in about twice asmuch as the value expected at the outcropping of the engineering bedrock. Finally, damagescenario maps based on the amplified ground motion could be produced as a supportingtool for urban planning and emergency system management.
2022
Istituto di Geologia Ambientale e Geoingegneria - IGAG
Italian seismic microzonation data
one-dimensional geotechnical model
seismic site response analyses
maps of amplification factors
territorial and emergency planning
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Descrizione: Italian seismic amplification factors for peak ground acceleration and peak ground velocity
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.14243/451752
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