PSI - Issue 44

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

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 44 (2023) 582–589

© 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. Abstract Past and recent seismic events underlined unexpected damage mechanisms of RC-frames consisting of widespread damages and collapses of beam-column joints. These outcomes, mainly concerned RC-frames designed before the introduction of modern seismic codes, clearly emphasize the paramount role of the beam-column joints in the context of the seismic safety assessment of RC-frames. In this paper, the Authors present a study devoted to numerically analyze the seismic response of RC-frames obtained by introducing in the finite element model of the frame with only beams and columns an additional component interposed between beam and column members able to reproduce the monotonic and cyclic nonlinear behavior of the beam-column joint element. In particular, the additional component consists of springs arranged according to the scissors model and characterized by constitutive laws calibrated by the Authors in a previous study with reference to different beam-column joint configurations. The numerical simulations carried out with reference to a literature case study highlight the importance of considering the contribution of the beam-column joints in the seismic analysis of RC frames. © 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: RC beam-column joints; nonlinear analysis; rotational springs; seismic capacity. XIX ANIDIS Conference, Seismic Engineering in Italy Modelling of exterior RC beam-column joints for the seismic assessment of RC-frames Ernesto Grande a , Maura Imbimbo b , Annalisa Napoli c , Riccardo Nitiffi b *, Roberto Realfonzo c a Department of Engineering Sciences, University Guglielmo Marconi, Via Plinio, 44, 00193, Roma, Italy b Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via G. Di Biasio, 43, 03043, Cassino (FR), Italy c Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy Abstract Past and recent seismic events underlined unexpected damage mechanisms of RC-frames consisting of widespread damages and collapses of beam-column joints. Thes outcomes, mainly concerned RC-frames designed before the introduction of modern seismic codes, clearly e phasize the paramount role of the beam-column joints in the cont xt of th seismic safety assess ent of RC-frames. In this pap r, t e Authors p esent a study devoted to numerically analyze the seismic respon e of RC-frames obtained by introducing in the finite element mod l of the frame with only beams and columns an additional component interpos d be we n eam and olumn members able to reproduce the monotonic and cyclic onlinear behavior of the beam-colum joint lement. I particular, the additional component consists of springs arranged a cordi g to the scissors m del and characterized by constitutive laws calibrat d by the Authors in a previous study with refer nce t ifferen beam-c lu n joint configurations. The numerical simulations carried out wit eference to a literature case study highlight the importance of co siderin the contribution of the beam-column jo nts in the seismic analysis of RC frame . © 2022 The Authors. Published by ELSEVIE 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 re ponsibility of scientific committe of the XIX ANIDIS C nference, Seismic Engineering in Italy Keywords: RC beam-column joints; nonlinear analysis; rotational springs; seismic capacity. XIX ANIDIS Conference, Seismic Engineering in Italy Modelling of exterior RC beam-column joints for the seismic assessment of RC-frames Ernesto Grande a , Maura Imbimbo b , Annalisa Napoli c , Riccardo Nitiffi b *, Roberto Realfonzo c a Department of Engineering Sciences, University Guglielmo Marconi, Via Plinio, 44, 00193, Roma, Italy b Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Via G. Di Biasio, 43, 03043, Cassino (FR), Italy c Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (SA), Italy

* Corresponding author. E-mail address: riccardo.nitiffi@unicas.it * Corresponding author. E-mail address: riccardo.nitiffi@unicas.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 © 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.2023.01.076