PSI - Issue 29

Leonardo Zaffi et al. / Procedia Structural Integrity 29 (2020) 157–164 Zaffi, Capestro and Viti / Structural Integrity Procedia 00 (2019) 000 – 000

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© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of Marco Tanganelli and Stefania Viti Keywords: Artifacts; safety of artifacts; blast hazard; vulnerability of case-studies; FE analysis. 1. Introduction The paper describes an experience made within the School of Architecture of the University of Florence together with Clet (Abraham2016, https://it.wikipedia .org/wiki/Clet_Abraham), a well-known representative of the street art, and a loca l rea l estate company. The experience consisted in the creation of a big temporary three-dimensiona l nose shaped staging which should change the façade of the Power Station, a forsaken industria l building, currently loca ted in Novoli, a modern residential area of Florence. Clet has a lready made severa l urban site-specific interventions in the town (see Figure 1), having different dimensions and duration. One of these interventions (Figure 1a) consisted of a wood-made nose-shaped sculpture which was located on the vertica l wa ll of the San Niccolò tower, in Florence. The sculpture was very light, and it was fixed a t the wall through some chords, without followingany specific technical requirement. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of Marco Tanganelli and Stefania Viti

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Fig. 1. Some urban interventions made by Clet: a. temporary art installations at the San Niccolò tower (Florence), b and c. “Eyes” of Prato Project” a temporary staging of the gates in the walls of the ancient city of Prato, d. Examples of art bombing on road signs: maybe the most famous Clet’s art works. (photo credits a,b,c by Clet) The current intervention had the purpose to enhance the area, underlining the role pla id by the Power Station, which is the symbol of the industria l identity of the town in the first ha lf of the XX century. The experience consisted of both the design and the rea lization of the intervention, and it involved a multidisciplina ry team, coordinated by the authors. The sculptu re consisted in a big nose ca lled “Maso”, having a light wood truss structure; it had to stand on the building façade for some months, before the beginning of a renewa l intervention on the building. Despite its temporary dura tion, the intervention had to face the possible cha llenge of the weather (ra in, wind etc.), since the