PSI - Issue 44

Giuseppina De Martino et al. / Procedia Structural Integrity 44 (2023) 1800–1807 Giuseppina De Martino et al. / Structural Integrity Procedia 00 (2022) 000–000

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economic point of view;

• the repair and strengthening cost were fully covered by public grant.

At the end of 2013, the Filiera had examined 5,775 projects and approved 4,280 of them (3,734 related to buildings OHC of L’Aquila municipality and 546 related to buildings OHC of the other municipalities). The total allocated funds for residential buildings OHC of L'Aquila municipality until September 2013 was about 2,1 billion Euro and the total amount due to the activity of the Filiera can be estimated of the order of 2.6 billion euros. Details on the data related to both "light damage" and "heavy damage” reconstructions are reported in [Di Ludovico et al., (2017a,b)]. Concerning the residential buildings IHC to date the reconstruction process of is still ongoing. At the end of 2019, 3,938 funding requests for repair and strengthening interventions on AMU’s were submitted to USRA (1,581) and USRC (2,357). The Special Offices approved 1,328 funding requests (566 by USRA and 762 by USRC). The total amount of public grant allocated for IHC residential buildings until December 2019 was about €1,6 billion (€0.913 billion by USRA and 0.690 billion by USRC). 3. Damaged buildings dataset The analysis of the funding requests related to both analytical (adopted OHC) and parametric models (adopted IHC) allowed to collect not only the usability ratings and repair and strengthening intervention costs but also building characteristics and the type of valuable elements. The buildings OHC are characterized by reinforced concrete buildings, masonry buildings or buildings with mixed structures. The historical centers are mainly characterized by masonry buildings. To compare the data provided by the analytical model with those provided by the parametric model only the buildings OHC with masonry structures are taken into account. The database analyzed contains data related to 1,563 funding requests for buildings OHC, and 730 and 833 funding requests for AMU IHC and approved by USRA and USRC, respectively. Each AMU’s can be made of one or more buildings with the one usability rating only (namely mono-rating AMU in the following) or with different usability ratings (namely multi-rating AMU’s in the following). In case of multi-rating, the AMU usability ratings can be: A BC; A-E; BC-E, A-BC-E. Fig. 1 depicts the distribution of usability ratings for OHC buildings (a) and for the AMU located inside historical center of L’Aquila (IHC L’Aquila ) (b) and of the other municipalities (IHC other ) (c).

Mono-rating

Multi-rating

Mono-rating

Multi-rating

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%

800

700

1.200

700

600

1.000

600

500

800

500

400

400

600

300

N. of AMU

300 N. of AMU

% of AMU

% of AMU

400

200

N. of builidings

200

100

100

200

0

0

BC

E

A-BC A-E BC-E A-BC-E

BC

E

A-BC A-E BC-E A-BC-E

0

BC

E

Usability rating AMU

Usability rating

Usability rating AMU

Mono-building AMU

Multi-buildings AMU

Mono-building AMU

Multi-buildings AMU

(a)

(b) (c) Fig. 1. Usability ratings of (a) OHC buildings, (b) AMU located IHC L’Aquila and (c) IHC Other

The distribution of buildings OHC as a function of building surface (i.e. total gross floor area) is reported in Fig. 2a; the distributions of AMU IHC L’Aquila and IHC Other as a function of AMU surface are reported in Fig. 2b and Fig. 2c, respectively. As expected, the average building OHC surface is lower than AMU IHC L’Aquila and in IHC other . This result is coherent with the different typological features of the built inside and outside historical center.