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 Sci nceDire t Available online at www.sciencedirect.com ScienceDirect

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

Procedia Structural Integrity 44 (2023) 187–194

© 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. The objective of the study is establishing a preliminary relationship between a) the DS attained by a certain building due to the occurrence of an earthquake with a certain intensity, and, so, the consequent usability judgment, with b) its period elongation. This is done in order to establish whether the vibration period elongation – which can be practically evaluated by means of ambient vibration tests – can be used for the assessment of structural usability after an earthquake as a tool for decision supporting in the aftermaths of a destructive event © 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: reinforced concrete; structure; vibration period; damage state; usability In this w rk, num ical incrementa t me-history analyses ar performed on case-study reinforced concrete residential buildings. The analyses results re used to establish the expected DS attained by stru tural an nonstru tural compon nts and, so, by the considered building: this is also r lated to a c rtain usability judgment, a already mentioned. In ne, the analyses results are also used to evaluate the period e ongation of the building t ncreasing i en ity of the s ismic emand. Th obj ctive of the study is est blishing a preliminary relationship between a) th DS attained by a certain building due to the occurren e of an earthquake wi h a certain intensity, and, so, the consequ t usability judgment, with b) ts period elongation. This is done in order to establ s whe her the vibration period elongation – which can be practically evaluated by means of ambient vibration t sts – c n be used for t e assessment of structural usability after an earthquake as a tool for d ci i n supporting in the af rmaths of a destructive ev nt © 2022 The Authors. Publi hed 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 u der re ponsibility of scientific committe of the XIX ANIDIS C nfere ce, Seismic Engineering in Italy K ywords: reinforced concrete; structure; vibration period; damag state; usability During an earthquake, the progressive damage of structural and nonstructural components of a structure yields to the degradation of their stiffness, thus resulting in a progressive increase of the vibration period of the structure as a whole. Also, the damage amount on structural and nonstructural elements, also known as Damage State (DS), can be determined by visual inspection or predicted, for a given earthquake scenario, by means of numerical analyses by relating the exceedance of a certain Engineering Demand Parameter (EDP) threshold to the attainment of a certain DS. Also, upon an earthquake, the observation of a certain DS in a building is the basis for the decision regarding its usability. In this work, numerical incremental time-history analyses are performed on case-study reinforced concrete residential buildings. The analyses results are used to establish the expected DS attained by structural and nonstructural components and, so, by the considered building: this is also related to a certain usability judgment, as already mentioned. In tune, the analyses results are also used to evaluate the period elongation of the building at increasing intensity of the seismic demand. During an earthquake, the progressive damage of structural and nonstructural components of a structure yields to the degradation of their stiffness, thus resultin in a progressive increase of the vibration pe iod f the structure as a whole. Also, the damage amount o structu al and no st uctural el ments, also known as Damage State (DS), can be determined by visual inspection or predicted, for a given earthquake scenario, by means of numerical an lyses by relating the xce danc of a cert in Engineering D man Pa ameter (EDP) thr shold to the attai ment of a ert i DS. Also, upon an arthquak , the observation of a certain DS in a building is the basis for the decision regardi g its usability. XIX ANIDIS Conference, Seismic Engineering in Italy Numerical evaluation of period elongation for the assessment of seismic damage and usability of RC residential buildings Mariano Di Domenico a *, Paolo Ricci a , Gerardo M. Verderame a a Department of Structures for Engineering and Architecture, University of Naples Federico II, Via Claudio 21, Naples 80125, Italy XIX ANIDIS Conference, Seismic Engineering in Italy Numerical evaluation of period elongation for the assessment of seismic damage and usability of RC residential buildings Mariano Di Domenico a *, Paolo Ricci a , Gerardo M. Verderame a a Department of Structures for Engineering and Architecture, University of Naples Federico II, Via Claudio 21, Naples 80125, Italy Abstract Abstract

* Corresponding author. Tel.: +39-081-7683341; fax: +39-081-7683332. E-mail address: mariano.didomenico@unina.it * Corresponding author. Tel.: +39-081-7683341; fax: +39-081-7683332. E-mail address: mariano.didomenico@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 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.2023.01.025