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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...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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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. |
format | Online Article Text |
id | pubmed-10674468 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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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