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) 3–10

© 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: MPS04; MPS19; exceedance of PSHA seismic actions; ShakeMap envelope. Abstract In Italy, seismic grou d motion intensity for structural design relies on probabilistic seismic hazard analysi (PSHA). Research ha shown that, even in the case of a oderate magnitude ea thquake, it is expected that grou d motion intensities larger than the design count rparts are observed a some sites in the epicentral region. The area where such an exceedanc has p ssibly occurred can b a se sed via ShakeM p. I th case of s ismic equences, ShakeMap envelopes allow to identify the fraction of t e r gion of inter st subjected to at l ast one exc e ance of d sign s ismic actions. For the 2016-2017 central Italy sequence, ShakeMap envelope reveal that exce dance of the design intensity enforced by the cu rent building code occurred in an area covering thousand of square kilometers, depe ing on the spectr l an exceedance retu n period of the design intensity. This study quantifies th exceed nce area of ground motion intensity accor ing to the PSHA results based n two alternative PSHA m dels for Italy. One is that at the basis of the official PSHA for Italy adopted by the curr t building code, known as MPS04; the other relies on a grid-seismicity source model deriving from a set f source model recently dev loped for new PSHA study for the country (MPS19). L oking at ShakeMap envelop s, it is found that the stimated exceeda ce area is of the same order of magnitude for the two hazard models, at least for the spectral and exceedance return periods considered herein. © 2022 The Authors. Published ELSEVIER B.V. This is an open access article under he 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: MPS04; MPS19; exceedance of PSHA seismic actions; ShakeMap envelope. XIX ANIDIS Conference, Seismic Engineering in Italy Exceedance of design seismic actions during the 2016-2017 central Italy seismic sequence: sensitivity to two seismic hazard models Pasquale Cito, a, * Antonio Vitale, a Iunio Iervolino a a Dipartimento di Strutture per l’Ingegneria e l’Architettura, Università degli studi di Napoli Federico II, via Claudio 21,Napoli, 80125, Italia Abstract In Italy, seismic ground motion intensity for structural design relies on probabilistic seismic hazard analysis (PSHA). Research has shown that, even in the case of a moderate magnitude earthquake, it is expected that ground motion intensities larger than the design counterparts are observed at some sites in the epicentral region. The area where such an exceedance has possibly occurred can be assessed via ShakeMap. In the case of seismic sequences, ShakeMap envelopes allow to identify the fraction of the region of interest subjected to at least one exceedance of design seismic actions. For the 2016-2017 central Italy sequence, ShakeMap envelopes reveal that exceedance of the design intensity enforced by the current building code occurred in an area covering thousands of square kilometers, depending on the spectral and exceedance return period of the design intensity. This study quantifies the exceedance area of ground motion intensity according to the PSHA results based on two alternative PSHA models for Italy. One is that at the basis of the official PSHA for Italy adopted by the current building code, known as MPS04; the other relies on a grid-seismicity source model deriving from a set of source models recently developed for a new PSHA study for the country (MPS19). Looking at ShakeMap envelopes, it is found that the estimated exceedance area is of the same order of magnitude for the two hazard models, at least for the spectral and exceedance return periods considered herein. XIX ANIDIS Conference, Seismic Engineering in Italy Exceedance of design seismic actions during the 2016-2017 central Italy seismic sequence: sensitivity to two seismic hazard models Pasquale Cito, a, * Antonio Vitale, a Iunio Iervolino a a Dipartimento di Strutture per l’Ingegneria e l’Architettura, Università degli studi di Napoli Federico II, via Claudio 21,Napoli, 80125, Italia

* Corresponding author. Tel.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: pasquale.cito@unina.it * Correspon ing author. T l.: +0-000-000-0000 ; fax: +0-000-000-0000 . E-mail address: pasquale.cito@unina.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 art cle under th CC BY-NC-ND license (https://creativecommons.org/licens s/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.2023.01.002