GNGTS 2016 - Atti del 35° Convegno Nazionale

GNGTS 2016 S essione A matrice 39 THE CONTRIBUTION OF RELUIS TO THE USABILITY ASSESSMENT OF SCHOOL BUILDINGS FOLLOWING THE 2016 CENTRAL ITALY EARTHQUAKE M. Di Ludovico 1 , A. Digrisolo 2 , F. Graziotti 3 , C. Moroni 4 , G. Baltzopoulos 5 , S. Biondi 6 , A. Borri 7 , S. Caprili 8 , C. Carocci 9 , A. Dall’Asta 10 , L. Dezi 11 , S. De Santis 12 , F. Di Fabio 13 , L. Di Sarno 14 , B. Ferracuti 15 , D. Ferretti 16 , G. Fiorentino 12 , U. Ianniruberto 17 , A. Mannella 18 , C. Mazzotti 19 , S. Podestà 20 , P. Riva 21 , A. Sandoli 1 , S. Silvestri 19 , L. Sorrentino 22 , A. Vignoli 23 , G. Magenes 3 , A. Masi 2 , A. Prota 1 , M. Dolce 4,1 , G. Manfredi 1 1 Università degli Studi Federico II, Napoli, Italy 2 Università della Basilicata, Potenza, Italy 3 Università di Pavia, Italy 4 Dipartimento della Protezione Civile, Roma, Italy 5 CNR ITC, Napoli, Italy 6 Università degli Studi “G. d’Annunzio”, Chieti, Italy 7 Università di Perugia, Italy 8 Università di Pisa, Italy 9 Università degli Studi di Catania, Italy 10 Università degli Studi di Camerino, Italy 11 Università Politecnica delle Marche, Ancona, Italy 12 Università degli Studi Roma Tre, Italy 13 Università degli Studi dell’Aquila, Italy 14 Università degli Studi del Sannio, Benevento, Italy 15 Università degli Studi N. Cusano, Roma, Italy 16 Università degli Studi di Parma, Italy 17 Università Tor Vergata, Roma, Italy 18 CNR ITC L’Aquila, Italy 19 Università di Bologna, Italy 20 Università di Genova, Italy 21 Università degli Studi di Bergamo, Italy 22 Università degli Studi “La Sapienza”, Roma, Italy 23 Università degli Studi di Firenze, Italy The recent earthquakes have shown the key role of post-earthquake inspections aimed at assessing the seismic safety and/or usability of buildings and the evaluation of the functionality of infrastructural systems. The technical inspections aims at minimizing the impact of the losses on citizens as fast as possible. In the immediate aftermath of the earthquake, the AeDES form (Baggio et al., 2007) is used to evaluate the safety conditions of buildings in order to enable people to return to their social and economic activities. The form can be filled based on the visual in situ inspection of the building, which represents the minimum structural unit with a significant impact on the people safety. The AeDES form is a first level survey form for post- earthquake damage and usability assessment; on May 5, 2011, the AeDES form, together with its field manual, has become the Italian official tool to assess ordinary buildings damaged by an earthquake (D.P.C.M., 2011). One of the main objectives of the Department of Civil Protection (DPC) in the aftermath of the earthquake is the assessment of damage on public and school buildings and the definition of a sound strategy to quickly repair and strengthen the ones with minor structural damage only. In the post-earthquake emergency of recent central Italy earthquake, which occurred on August 24, 2016 at 03:36 AM local time, the total amount of surveys carried out by technicians of several institutions involved 637 public buildings. In particular, post-earthquake inspections were carried out on 538 school buildings with 374 buildings, corresponding to 70% of the dataset, assessed as usable. The remaining buildings resulted usable only after short-term countermeasures or partially usable (buildings with limited or no structural damage but with severe nonstructural damage, about 24%), or unusable (high structural or nonstructural risk, high external or geotechnical risk, about 6%). The ReLUIS (i.e. Laboratories University Network of seismic engineering) consortium, which is a Competence Centre of the Department of Civil Protection (DPC), has been strongly involved in the post-earthquake emergency of central Italy earthquake. The Consortium