PSI - Issue 64

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2023) 000 – 000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 64 (2024) 1041–1048

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Seismic strengthening of existing structures by external steel exoskeletons Alessandro Prota a , Roberto Trataglia b,* , Raffaele Landolfo a a Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Via Forno Vecchio 36, 80134 Na ples, Italy b Department of Engineering, University of Sannio, Piazza Roma 21, 82100 Benevento, Italy Abstract The evaluation of the structural safety of existing schools and the planning of their retrofit measures are vital and top priority tasks. This research intends (i) to assess the structural safety of a steel school building in Italy and (ii) to suggest retrofitting measures to improve its seismic resilience. The first section describes and discusses the data collection and the numerical model developed, representative of the existing building. Pushover analyses are then conducted to evaluate the seismic performance of the completed structure. Based on the identified shortcomings, a novel strengthening intervention using 2D parallel steel exoskeletons was developed following a displacement-based step-by-step method. The exoskeleton systems were designed considering the architectural and functional needs of the school building, with the goal of maintaining structural safety while preserving the building's aesthetics and usability. Lastly, the efficacy of the chosen retrofitting method was verified through non linear static analysis conducted on the reinforced structure. © 2024 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 SMAR 2024 Organizers Keywords: Existing structures; assessment and retrofit; steel bracing; parallel exoskeleton; non-linear analysis. © 2024 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 SMAR 2024 Organizers

* Corresponding author. E-mail address: rotartaglia@unisannio.it

2452-3216 © 2024 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 SMAR 2024 Organizers

2452-3216 © 2024 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 SMAR 2024 Organizers 10.1016/j.prostr.2024.09.395