PSI - Issue 44

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 44 (2023) 1188–1195

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy. © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy Keywords: Precast RC buildings; fuse device; dissipative connection; industrial buildings; time history analyses; seismic retrofitting. Abstract Prec st RC structures are a typology of constructio widely spread in Italy among industrial buildings, made of single-storey isostatic RC frames built, in past decades, without ny connection between beams and c lumns. The Emilia Earthquake (2012) caused extensive damages in this kind of buildings that have a si nificant mass located at roof level a d lack of connections etween horizontal and vertical elements. The recent seismic events highlighted that the lack of connectio s is the main v lnerability of existing precast RC buildings and at the same time that lar e displacements are determined between beams nd columns. In order to improve the seismic performance of precast RC buildings a cost-effecti e solution is to dissipate energy at roof level, avoiding at the same time any loss of support between elements. Dissipative fuse devices (Sismocell) placed at beam-column joints are abl to dissipate energy and guarantee an effective connection between elements. To evaluate the improvement achieved with the use of Sismocell devices, on-linear time history analyses are usually performed, taking into account the plasti hi ges at column base. This work aims t quantify the improveme t that can be obtained using Sismocell devices, in terms of reduction of effect of actions in different typologies of structures, remaining in the range of elastic behavior of materials. The TH analyses have been performe on differe t frame configurations with different seismic input, comparing the behavior of models with hinged connections and connections equipped with dissipative fuse devices. In order to define the optimal force of plastic activation of Sis ocell devices, different device sizes have been considered. The results have been analyzed in terms of reductions of shear and moment at base of the columns, with different scaling factor applied to seismic input. Finally, a proposal of a simplified approach based on linear analyses has been compared to TH results. © 2022 The Authors. Published by ELSEVIER B.V. This is an ope acces article under t CC BY-NC-ND lic nse ( https://creativec mmons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy Keywords: Precast RC buildings; fuse device; dissipative connection; industrial buildings; time history analyses; seismic retrofitting. XIX ANIDIS Conference, Seismic Engineering in Italy TH Analyses and Simplified Approach for Precast RC Frames Retrofit with Dissipative Fuse Devices Sismocell Devis Sonda a *, Andrea Vittorio Pollini a a Sismo Solution s.r.l. Viale Angelo Masini 48, 40126 Bologna, Italy Abstract Precast RC structures are a typology of construction widely spread in Italy among industrial buildings, made of single-storey isostatic RC frames built, in past decades, without any connection between beams and columns. The Emilia Earthquake (2012) caused extensive damages in this kind of buildings that have a significant mass located at roof level and lack of connections between horizontal and vertical elements. The recent seismic events highlighted that the lack of connections is the main vulnerability of existing precast RC buildings and at the same time that large displacements are determined between beams and columns. In order to improve the seismic performance of precast RC buildings a cost-effective solution is to dissipate energy at roof level, avoiding at the same time any loss of support between elements. Dissipative fuse devices (Sismocell) placed at beam-column joints are able to dissipate energy and guarantee an effective connection between elements. To evaluate the improvement achieved with the use of Sismocell devices, non-linear time history analyses are usually performed, taking into account the plastic hinges at column base. This work aims to quantify the improvement that can be obtained using Sismocell devices, in terms of reduction of effect of actions in different typologies of structures, remaining in the range of elastic behavior of materials. The TH analyses have been performed on different frame configurations with different seismic input, comparing the behavior of models with hinged connections and connections equipped with dissipative fuse devices. In order to define the optimal force of plastic activation of Sismocell devices, different device sizes have been considered. The results have been analyzed in terms of reductions of shear and moment at base of the columns, with different scaling factor applied to seismic input. Finally, a proposal of a simplified approach based on linear analyses has been compared to TH results. XIX ANIDIS Conference, Seismic Engineering in Italy TH Analyses and Simplified Approach for Precast RC Frames Retrofit with Dissipative Fuse Devices Sismocell Devis Sonda a *, Andrea Vittorio Pollini a a Sismo Solution s.r.l. Viale Angelo Masini 48, 40126 Bologna, Italy

* Corresponding author. Tel.: +39 051 0218168 E-mail address: dsonda@sismosolution.com * Corresponding author. Tel.: +39 051 0218168 E-mail address: dsonda@sismosolution.com

2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy 2452-3216 © 2022 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the XIX ANIDIS Conference, Seismic Engineering in Italy. 10.1016/j.prostr.2023.01.153