PSI - Issue 44

Giacomo Lazzerini et al. / Procedia Structural Integrity 44 (2023) 163–170 Giacomo Lazzerini et al. / Structural Integrity Procedia 00 (2022) 000–000

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The database consists of eight groups of fragility curves and can be intuitively used: to know the fragility of a given building of the studied typology, all that is required is to enter the database with the number of storeys, the type of material at the ground floor, and the percentage of openings at the ground floor. Once the group of fragility curves is identified, the probability of exceeding a given level of damage at an assigned seismic intensity is found. The database can be a useful tool for assessing damage scenarios at a territorial scale on a large number of buildings. The eight groups of curves refer to the eight sub-typologies in the database in Fig. 7, although due to the graphical scale they may appear to be very similar to each other they are considerably different. This can be well noticed by observing the ranges of variation that are obtained by making the maximum and minimum envelope, for each damage limit state (DL i ), among all the fragility curves considered in the database (Fig. 8). Especially for high damage levels, significant differences are obtained.

Fig. 7: Database of fragility curves

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Fig. 8: Cuvers variation ranges for DL4 and DL4