2D Seismic response analyses from 3rd Level Seismic Microzonation in the Southern Italy: approaches and applications

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4. 2D Seismic response analyses from 3rd Level Seismic Microzonation in the Southern Italy: approaches and applications

Publication Title
2D Seismic response analyses from 3rd Level Seismic Microzonation in the Southern Italy: approaches and applications

Abstract
Seismic Microzonation studies of 3rd Level (SM3) have been performed for the emergency management and the reconstruction of several Municipalities in the eastern flank of Mt. Etna (Southern Italy) hit by the 2018 seismic sequence. The most energetic event (Mw=4.9) occurred on 26th December 2018, causing phenomena of superficial faulting along the Fiandaca Fault (FF), where the most damaged areas are located. In order to define the subsoil model for each seismic homogeneous microzone (SHM) and to perform extensive numerical analyses, intense investigations have been carried out including in situ and laboratory tests. For the estimation of the spatial variability in seismic response, the finite element code PLAXIS 2D has been employed. Moreover, the Hardening Soil model with small-strain stiffness (HS small model), which includes an increased soil stiffness for small strains, has been adopted in order to consider the soil non-linearity. For each SHM, results are presented in terms of acceleration response spectra and amplification factors (AFj). The latter are calculated for three different period intervals linked to the heights of buildings according to the Italian Guidelines and Standards. The results of this work provide important information for the development of urban planning aimed at reducing seismic risk.
Authors
S. Grasso; M. R. Massimino; M. S. V. Sammito

Published In

18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)

Theme

B - Geohazards

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