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Damage Identification in Cement-Based Structures: A Method Based on Modal Curvatures and Continuous Wavelet Transform

Modal analysis is an effective tool in the context of Structural Health Monitoring (SHM) since the dynamic characteristics of cement-based structures reflect the structural health status of the material itself. The authors consider increasing level load tests on concrete beams and propose a methodol...

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Autores principales: Cosoli, Gloria, Martarelli, Milena, Mobili, Alessandra, Tittarelli, Francesca, Revel, Gian Marco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10674468/
https://www.ncbi.nlm.nih.gov/pubmed/38005678
http://dx.doi.org/10.3390/s23229292
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author Cosoli, Gloria
Martarelli, Milena
Mobili, Alessandra
Tittarelli, Francesca
Revel, Gian Marco
author_facet Cosoli, Gloria
Martarelli, Milena
Mobili, Alessandra
Tittarelli, Francesca
Revel, Gian Marco
author_sort Cosoli, Gloria
collection PubMed
description Modal analysis is an effective tool in the context of Structural Health Monitoring (SHM) since the dynamic characteristics of cement-based structures reflect the structural health status of the material itself. The authors consider increasing level load tests on concrete beams and propose a methodology for damage identification relying on the computation of modal curvatures combined with continuous wavelet transform (CWT) to highlight damage-related changes. Unlike most literature studies, in the present work, no numerical models of the undamaged structure were exploited. Moreover, the authors defined synthetic damage indices depicting the status of a structure. The results show that the I mode shape is the most sensitive to damages; indeed, considering this mode, damages cause a decrease of natural vibration frequency (up to approximately −67%), an increase of loss factor (up to approximately fivefold), and changes in the mode shapes morphology (a cuspid appears). The proposed damage indices are promising, even if the level of damage is not clearly distinguishable, probably because tests were performed after the load removal. Further investigations are needed to scale the methodology to in-field applications.
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spelling pubmed-106744682023-11-20 Damage Identification in Cement-Based Structures: A Method Based on Modal Curvatures and Continuous Wavelet Transform Cosoli, Gloria Martarelli, Milena Mobili, Alessandra Tittarelli, Francesca Revel, Gian Marco Sensors (Basel) Article Modal analysis is an effective tool in the context of Structural Health Monitoring (SHM) since the dynamic characteristics of cement-based structures reflect the structural health status of the material itself. The authors consider increasing level load tests on concrete beams and propose a methodology for damage identification relying on the computation of modal curvatures combined with continuous wavelet transform (CWT) to highlight damage-related changes. Unlike most literature studies, in the present work, no numerical models of the undamaged structure were exploited. Moreover, the authors defined synthetic damage indices depicting the status of a structure. The results show that the I mode shape is the most sensitive to damages; indeed, considering this mode, damages cause a decrease of natural vibration frequency (up to approximately −67%), an increase of loss factor (up to approximately fivefold), and changes in the mode shapes morphology (a cuspid appears). The proposed damage indices are promising, even if the level of damage is not clearly distinguishable, probably because tests were performed after the load removal. Further investigations are needed to scale the methodology to in-field applications. MDPI 2023-11-20 /pmc/articles/PMC10674468/ /pubmed/38005678 http://dx.doi.org/10.3390/s23229292 Text en © 2023 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
Cosoli, Gloria
Martarelli, Milena
Mobili, Alessandra
Tittarelli, Francesca
Revel, Gian Marco
Damage Identification in Cement-Based Structures: A Method Based on Modal Curvatures and Continuous Wavelet Transform
title Damage Identification in Cement-Based Structures: A Method Based on Modal Curvatures and Continuous Wavelet Transform
title_full Damage Identification in Cement-Based Structures: A Method Based on Modal Curvatures and Continuous Wavelet Transform
title_fullStr Damage Identification in Cement-Based Structures: A Method Based on Modal Curvatures and Continuous Wavelet Transform
title_full_unstemmed Damage Identification in Cement-Based Structures: A Method Based on Modal Curvatures and Continuous Wavelet Transform
title_short Damage Identification in Cement-Based Structures: A Method Based on Modal Curvatures and Continuous Wavelet Transform
title_sort damage identification in cement-based structures: a method based on modal curvatures and continuous wavelet transform
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10674468/
https://www.ncbi.nlm.nih.gov/pubmed/38005678
http://dx.doi.org/10.3390/s23229292
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AT tittarellifrancesca damageidentificationincementbasedstructuresamethodbasedonmodalcurvaturesandcontinuouswavelettransform
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