PSI - Issue 62

Diana Salciarini et al. / Procedia Structural Integrity 62 (2024) 522–529

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Author name / Structural Integrity Procedia 00 (2019) 000 – 000

severe landslide-AC due to their associated sizing. On the contrary, rapid landslides generally have smaller volumes (for example rainfall-induced shallow landslides, sometimes evolving into debris flows, or rockfalls) and, in principle, they can produce a less severe landslide-AC because of the smaller associated size. Indeed, from Fig. 7 it is evident that the two less critical landslides- AC categories (Medium, and Medium-Low) are associated with Rapid or Very Rapid phenomena.

Fig. 7. Distributions of landslide maximum expected velocity (PV) for different landslide-AC levels.

Of considerable interest is the histogram presented in Fig. 8, which highlights the correlation between the landslide-AC and the extent of interference of the landslide with the infrastructure From this analysis it emerges that a total interference between the landslide and the infrastructure leads to an assignment of the landslide-AC in the most severe category (High). However, the presence of cases with a partial interaction is noteworthy, particularly contributing to the Medium-High landslide-AC category, meaning that the role of partial interference is still relevant in bringing the landslide-AC evaluation toward the most severe categories. Conversely, the presence of a landslide in the approaching zone typically leads to the less severe landslide-AC category (Medium-Low). This observation emphasizes the pivotal role of the specific extent of interference in determining the severity of the landslide-AC, with total interference presenting the highest risk, partial interference contributing to a significant risk, and the presence of a landslide in the approach zone resulting in a comparatively lower risk.

Fig. 8. Distribution of the extent of interference of the landslide with the infrastructure for different landslide-AC levels.