PSI - Issue 44

Franco Braga et al. / Procedia Structural Integrity 44 (2023) 331–338 Franco Braga et al. / Structural Integrity Procedia 00 (2022) 000–000

334

4

Table 3. D-damage index conversion, calculated in the parametric sheet according to the EMS 98 scale. D Global Damage EMS 98 0 D0 >0 e ≤ 0,2 D1 >0,2 e ≤ 0,4 D2 >0,4 e ≤ 0,6 D3 >0,6 e ≤ 0,8 D4 >0,8 e ≤ 1 D5

For more details on the simplified templates, you can refer to the "Manuale di istruzioni della Scheda di Accompagnamento ai Progetti di Ricostruzione del Comune dell’Aquila". 3. Floor connections For connections between masonry and decks, the simplified vulnerability model has two separate entries, entry No. 5 "Intermediate Floor: Connection to load-bearing vertical structures" and item No. 6 "Roof structures: Connection to load-bearing vertical structures." For both items, the vulnerability is to be considered low (V1) if at least 80% of the surface area of the floors/roofs are well connected, high (V3) if the well connected floors/roofs are less than 50%, medium (V2) in the remaining cases. Table 4 and the graph in Fig. 2 show the average damage for the nine combinations given by the vulnerability levels related to the intermediate floor and roof horizons.

Table 4. Average damage Dm assessed because of vulnerability due to floor connections. (*) Damage variation from the low vulnerability condition V1-V1 (effective connections).

Other indicators of vulnerability (average)

vulnerability due to floor connections

vulnerability due to roof horizons

Dm Damage (average)

Dev. standard Dm

No floors (average)

D Dm (*) (%)

No.

D Dm (*)

V1 V1 V1 V2 V2 V2 V3 V3 V3

V1 V2 V3 V1 V2 V3 V1 V2 V3

70

0.241 0.375 0.337 0.275 0.498 0.409 0.353 0.516 0.503

-

-

0.254 0.373 0.275 0.235 0.240 0.226 0.254 0.235 0.269

20.129 20.750 23.197 26.300 27.833 26.684 26.227 28.958 26.744

2.51 2.00 1.61 3.00 3.00 3.11 3.01 3.25 2.70

4

0.134 0.096 0.034 0.257 0.168 0.112 0.275 0.262

55.6% 39.7% 13.9% 106.5% 69.8% 46.6% 113.9% 108.6%

71 10

6

19

119

24

542

At vulnerability V1-V1 (structural units with effective connections), as expected, the damage assumes the minimum value (0.241). In the conditions with higher vulnerability (V3-V2 and V3-V3 combinations), the damage is more than doubled, as shown in the "Dm (%)" column of Table 4. In light of the data shown in Table 4, it is noted that as the vulnerability due to the inefficiency of floor connections and the resulting increase in damage increases, the vulnerability given by the other deficiencies in the simplified model, whose score is shown in the "vulnerability other items (average)" column, also increases significantly.