PSI - Issue 44

Carolina Bazzani et al. / Procedia Structural Integrity 44 (2023) 171–178 Carolina Bazzani et al. / Structural Integrity Procedia 00 (2022) 000–000

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Municipality was classified according to the building typologies included in the EMS98 Macroseismic Intensity Scale (Grünthal, 1998), and a total of 22 building sectors were identified. The Barberino di Mugello village can be divided into a historic centre sector (1), within which about 70% of the built-up area consists of predominantly irregular masonry buildings (M1), and three expansion sectors (2, 3, 4), consisting of regular masonry buildings of more recent construction (M3-M5) and reinforced concrete buildings (RC); within the most recent expansion sector (4), 100% of the built-up area is made of reinforced concrete buildings (Fig. 2).

M1 = 70%

EXPANSION SECTOR 4

• •

Period: < 1945

Irregular or moderately regular masonry

EXPANSION SECTOR 3

HISTORIC SECTOR

RC = 100%

• •

Period: > 1996 RC structure

EXPANSION SECTOR 2

Fig. 2. Sectors of Barberino di Mugello and percentages of M1 and RC buildings in the historic sector 1 and expansion sector 4.

3. Vulnerability analysis 3.1. Vulnerability assessment

Applying the Macroseismic Method and starting from the definition of the vulnerability at the single building scale and then extending the results to building sectors, the seismic vulnerability can be assessed. A vulnerability graphical representation, that includes its variability, is depicted in the box plot of Fig. 3. It is shown that, as expected, in historical sector 1 (Fig. 3a) the vulnerability is higher than in the more recent expansion sector 4 (Fig. 3b). (a)

0,839

0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0 0,235

(b)

0,0 0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1,0

Fig. 3. Vulnerability index of historic sector 1 (a) and expansion sector 4 (b)

3.2. Application of vulnerability analysis methods

To assess the seismic vulnerability of each building or group of buildings, the following methods were adopted and compared: the EMS98 Method, the Macroseismic Method, the updated Macroseismic Method (Lagomarsino et al., (2021), the S.A.V.E. Method (Zuccaro & Cacace, 2015), and the updated S.A.V.E. Method (Zuccaro et al., 2021). The EMS98 Method allows for a simple estimation of the most likely vulnerability class of the buildings as a function of their typology. In the municipality of Barberino di Mugello, it is shown that 41% of the buildings belong