PSI - Issue 44

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 44 (2023) 550–557

© 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 This work aims at analysing the design rules proposed for DC2 ductility class, introduced in the new prEN1998 draft, that is a new class intermediate between the low and hight ones. Simplified design rules aimed only at avoiding the so called soft-storey mechanism are proposed, because it is considered unnecessary to follow design rules that aim at the development of a global mechanism as occurs in the high ductility class. In particular, the design condition which is the statement of the DC2 design is based on an inequality that must be satisfied at all the storeys, which both does not consider the beam-column hierarchy criterion and does not possess any scientific background. This work aims to highlight the design rules proposed for MRFs in this new ductility class by carrying out a critical analysis. The attention is mainly focused on the soft-storey mitigation criterion and its application in a study case that represent the novelty of the paper. © 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: DC2; Moment Resisting Frames, New EC8, Soft-Storey Mechanism, Seismic Response, Pushover Analysis 1. Introduction The reference code to design seismic resistant structures in the European context is the prEN1998 (2021). Currently a new version of this code is being drafted and it is in the last stages of the revision. It presents a l XIX ANIDIS Conference, Seismic Engineering in Italy Critical discussion of DC2 design rules for MR-Frames in the framework of the prEN1998 draft Maria Maglio a *, Rosario Montuori b , Elide Nastri a , Vincenzo Piluso a a Department of Civil Engineering, University of Salerno b Department of Pharmacy, University of Salerno Via Giovanni Paolo II 132, 84084 Fisciano (SA)

* Corresponding author. Tel.: 349 5918034. E-mail address: mamaglio@unisa.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.2023.01.072