PSI - Issue 78

Marco Civera et al. / Procedia Structural Integrity 78 (2026) 1783–1790

1789

reached, not even for a single bridge or building, for any of the 2000 simulations. Instead, despite the lower seismic input, at least one asset reached DS1 – DS4, as shown here below. Due to space limitations, these results are grouped together in Figure 4.

(a)

(b)

(c) (d) Fig. 4. Uncorrected RN efficiency for a scenario with return period =50 years and considering (a) DS1, (b) DS2, (c) DS3, and (d) DS4. 4.6. Comparison of long- vs short-term RN resilience To recapitulate, Figure 5.a summarises all these findings for Sc475, comparing vs , , from DS1 to DS4, while Figure 5.b reports the same for Sc50. By comparing the two graphs, one can notice that the effect of the correcting factors for DS3 and DS4 makes the results of Sc50 and Sc475 almost identical to the third decimal digit.

(a) (b) Fig. 5. Trends of corrected (yellow) and uncorrected (red) RN efficiency indices for a scenario with return period (a) =475 years and (b) =50 years, in both cases considering DS1, DS2, DS3, and DS4.