PSI - Issue 62

329 7

Stefano Bozzaa et al. / Procedia Structural Integrity 62 (2024) 323–330 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

Figure 1. Fragility curves for different construction period, reference time and span for first class bridges and second class bridges.

Considering the effects of corrosion, 90s bridges are less vulnerable with respect to older ones, with the exception of first class bridges longer than 30 m, which are more vulnerable compared to 60s first class ones. Generally, corrosion decrease the median and increase the dispersion of the fragility curves, with higher effects on second class bridges than on first class ones, and higher effects on short span bridges than on long span bridges. This seems to indicate that sections with less resistance are more sensitive to the effects of corrosion.