PSI - Issue 44

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

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Procedia Structural Integrity 44 (2023) 291–298

© 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. In this paper, a numerical study on the response of multi-storey moment-resisting steel frames subjected to seismic actions, accounting for the real behavior of both the beam-to-column joints and the column bases, is presented. Two real benchmark buildings are considered for the purpose. The examined buildings are characterized by beam-to-column joints and column bases with semi-rigid and partial-strength behavior, although they were improperly assumed as rigid and full-strength in the original design process of the frames. In order to appraise how this wrong assumption influenced the building safety, finite element models are set up, first by modelling the joints according to the original design approach and then including the real stiffness and strength. Nonlinear dynamic analyses are performed and fragility curves for different limit states are obtained, considering the record-to record variability as main source of uncertainty. © 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: Semi-rigid joints; Multi-storey steel frames; Seismic performance; Fragility curves. is This is an open access article under the CC BY-NC-ND license ( XIX ANIDIS Conference, Seismic Engineering in Italy Seismic performance of multi-storey steel frames with semi-rigid joints Greta Agata Venneri a , Giuseppe Giampaolo Di Girolamo a , Ivan Memmo a , Giuseppe Brando a* , Gianfranco De Matteis b a Department of Engineering and Geology, University “G. d’Annunzio” of Chieti-Pescara, Viale Pindaro 42, Pescara 65127, Italy b Department of Architecture and Industrial Design, University of Campania “L. Vanvitelli”, Aversa (CE), 81031, Italy e a a a a a* b Abstract

1. Introduction

The structural behavior of steel Moment Resisting Frames (MRFs) is significantly affected by their joints performance, which has to be taken into account carefully whether reliable structural evaluations are desired to be

* Corresponding author. Tel.: 0854537071. E-mail address: giuseppe.brando@unich.it

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.2023.01.038