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Seismic Retrofitting of Existing Industrial Steel Buildings: A Case-Study

Industrial single-storey buildings are the most diffuse typology of steel construction located in Italy. Most of these existing buildings were erected prior to the enforcement of adequate seismic provisions; hence, crucial attention is paid nowadays to the design of low-impact retrofit interventions...

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Autores principales: Tartaglia, Roberto, Milone, Aldo, Prota, Alessandro, Landolfo, Raffaele
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9101308/
https://www.ncbi.nlm.nih.gov/pubmed/35591610
http://dx.doi.org/10.3390/ma15093276
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author Tartaglia, Roberto
Milone, Aldo
Prota, Alessandro
Landolfo, Raffaele
author_facet Tartaglia, Roberto
Milone, Aldo
Prota, Alessandro
Landolfo, Raffaele
author_sort Tartaglia, Roberto
collection PubMed
description Industrial single-storey buildings are the most diffuse typology of steel construction located in Italy. Most of these existing buildings were erected prior to the enforcement of adequate seismic provisions; hence, crucial attention is paid nowadays to the design of low-impact retrofit interventions which can restore a proper structural performance without interrupting productive activities. Within this framework, an existing industrial single-storey steel building located in Nusco (Italy) is selected in this paper as a case-study. The structure, which features moment resisting (MR) truss frames in both directions, is highly deformable and presents undersized MR bolted connections. Structural performance of the case-study was assessed by means of both global and local refined numerical analyses. As expected, the inadequate performance of connections, which fail due to brittle mechanisms, detrimentally affects the global response of the structure both in terms of lateral stiffness and resistance. This effect was accounted for in global analyses by means of properly calibrated non-linear links. Thus, both local and global retrofit interventions were designed and numerically investigated. Namely, lower chord connections were strengthened by means of rib stiffeners and additional rows of M20 10.9 bolts, whereas concentrically braced frames (CBFs) were placed on both directions’ facades. Designed interventions proved to be effective for the full structural retrofitting against both seismic and wind actions without limiting building accessibility.
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spelling pubmed-91013082022-05-14 Seismic Retrofitting of Existing Industrial Steel Buildings: A Case-Study Tartaglia, Roberto Milone, Aldo Prota, Alessandro Landolfo, Raffaele Materials (Basel) Article Industrial single-storey buildings are the most diffuse typology of steel construction located in Italy. Most of these existing buildings were erected prior to the enforcement of adequate seismic provisions; hence, crucial attention is paid nowadays to the design of low-impact retrofit interventions which can restore a proper structural performance without interrupting productive activities. Within this framework, an existing industrial single-storey steel building located in Nusco (Italy) is selected in this paper as a case-study. The structure, which features moment resisting (MR) truss frames in both directions, is highly deformable and presents undersized MR bolted connections. Structural performance of the case-study was assessed by means of both global and local refined numerical analyses. As expected, the inadequate performance of connections, which fail due to brittle mechanisms, detrimentally affects the global response of the structure both in terms of lateral stiffness and resistance. This effect was accounted for in global analyses by means of properly calibrated non-linear links. Thus, both local and global retrofit interventions were designed and numerically investigated. Namely, lower chord connections were strengthened by means of rib stiffeners and additional rows of M20 10.9 bolts, whereas concentrically braced frames (CBFs) were placed on both directions’ facades. Designed interventions proved to be effective for the full structural retrofitting against both seismic and wind actions without limiting building accessibility. MDPI 2022-05-03 /pmc/articles/PMC9101308/ /pubmed/35591610 http://dx.doi.org/10.3390/ma15093276 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Tartaglia, Roberto
Milone, Aldo
Prota, Alessandro
Landolfo, Raffaele
Seismic Retrofitting of Existing Industrial Steel Buildings: A Case-Study
title Seismic Retrofitting of Existing Industrial Steel Buildings: A Case-Study
title_full Seismic Retrofitting of Existing Industrial Steel Buildings: A Case-Study
title_fullStr Seismic Retrofitting of Existing Industrial Steel Buildings: A Case-Study
title_full_unstemmed Seismic Retrofitting of Existing Industrial Steel Buildings: A Case-Study
title_short Seismic Retrofitting of Existing Industrial Steel Buildings: A Case-Study
title_sort seismic retrofitting of existing industrial steel buildings: a case-study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9101308/
https://www.ncbi.nlm.nih.gov/pubmed/35591610
http://dx.doi.org/10.3390/ma15093276
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