PSI - Issue 78

Giovanni Smiroldo et al. / Procedia Structural Integrity 78 (2026) 1585–1592

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Fig. 2 . View of the receivers’ location with the horizontal projection of the ITIS131 fault geometry.

The models incorporate detailed knowledge of the crustal properties along the path of seismic wave propagation. The deep geological structure for each fault is chosen to agree with the regional tectonics obtained from tomographic investigations (Brandmayr et al., 2010). To adequately represent site effects, real shallow soil profiles are superimposed on the deeper path structures. These local stratigraphies are assigned according to Eurocode 8 classes (soil types A, B, and C), and three corresponding site models are presumed. Shallow geotechnical profiles are derived from the European Strong Motion Database (Luzi et al., 2020) and selected in terms of depth of investigation and quality of site characterization (Barnaba, 2021; Smiroldo et al., 2025), as shown in Fig. 3.

(a) (c) Fig. 3. ITIS131 velocity profile of the (a) deep structure, (b) shallow structure (shallow soil A); (c) Q s and Q p profiles. (b)

4. Seismological validation The herein described methodology was adopted to validate the PBS database. In Italy, the reference GMPEs for the PSHA are those obtained by (Bindi et al., 2011), named ITA10. Thus, in the present work the same GMPEs are used for the comparison, considering the following intensity measures:  Spectral Acceleration ( ( )): This is a key measure of the amplitude of ground shaking at a specific period T , and the GMPE relation used for this parameter is from (Bindi et al., 2011).