Detecting damage location and severity in a double layer grid using modal strain energy method and data fusion

Changes in modal strain energy of elements before and after damage is a robust damage detection index. However, in structures like double layer grids which have large number of elements, this method has some problems. First, In large structures this method needs more mode shapes to detect damage thr...

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Autores principales:	hamed teimouri, Mohammad Reza Davoodi, Seyed amin Mostafavian
Formato:	article
Lenguaje:	FA
Publicado:	Iranian Society of Structrual Engineering (ISSE) 2020
Materias:	damage detection modal strain energy method bayesian theory double layer grid charged system search Bridge engineering TG1-470 Building construction TH1-9745
Acceso en línea:	https://doaj.org/article/70b1438754fb4daf8e32c89e5db0f16b
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id	oai:doaj.org-article:70b1438754fb4daf8e32c89e5db0f16b
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spelling	oai:doaj.org-article:70b1438754fb4daf8e32c89e5db0f16b2021-11-08T15:53:20ZDetecting damage location and severity in a double layer grid using modal strain energy method and data fusion2476-39772538-261610.22065/jsce.2018.126917.1518https://doaj.org/article/70b1438754fb4daf8e32c89e5db0f16b2020-09-01T00:00:00Zhttps://www.jsce.ir/article_70568_b4085ea9e1a76bff5b74c6bfa8203747.pdfhttps://doaj.org/toc/2476-3977https://doaj.org/toc/2538-2616Changes in modal strain energy of elements before and after damage is a robust damage detection index. However, in structures like double layer grids which have large number of elements, this method has some problems. First, In large structures this method needs more mode shapes to detect damage through modal strain energy method which in practice is difficult to determine. Second, this method introduce some healthy elements as damaged element. To overcome these problems, in this paper a two stage damage detection technique based on modal strain energy method is presented for detecting damage in double layer grids. First, the Modal Strain Energy Based Index (MSEBI) for each mode shape is determined. Then a data fusion technique based on Bayesian theory is used to combine MSEBI values obtained from each mode shape to find damaged elements. Then Charged System Search (CSS) optimization method which is a powerful optimization method is employed to optimize an objective function based on natural frequency to determine damage severity of damaged elements. To demonstrate the performance of the proposed method, a large double layer grid with 1536 elements and different single and multiple damage cases is considered. Numerical results show that the proposed method can successfully find damaged elements and their severities using only few first numbers of mode shapes and frequencies.hamed teimouriMohammad Reza DavoodiSeyed amin MostafavianIranian Society of Structrual Engineering (ISSE)articledamage detectionmodal strain energy methodbayesian theorydouble layer gridcharged system searchBridge engineeringTG1-470Building constructionTH1-9745FAJournal of Structural and Construction Engineering, Vol 7, Iss 3, Pp 35-54 (2020)
institution	DOAJ
collection	DOAJ
language	FA
topic	damage detection modal strain energy method bayesian theory double layer grid charged system search Bridge engineering TG1-470 Building construction TH1-9745
spellingShingle	damage detection modal strain energy method bayesian theory double layer grid charged system search Bridge engineering TG1-470 Building construction TH1-9745 hamed teimouri Mohammad Reza Davoodi Seyed amin Mostafavian Detecting damage location and severity in a double layer grid using modal strain energy method and data fusion
description	Changes in modal strain energy of elements before and after damage is a robust damage detection index. However, in structures like double layer grids which have large number of elements, this method has some problems. First, In large structures this method needs more mode shapes to detect damage through modal strain energy method which in practice is difficult to determine. Second, this method introduce some healthy elements as damaged element. To overcome these problems, in this paper a two stage damage detection technique based on modal strain energy method is presented for detecting damage in double layer grids. First, the Modal Strain Energy Based Index (MSEBI) for each mode shape is determined. Then a data fusion technique based on Bayesian theory is used to combine MSEBI values obtained from each mode shape to find damaged elements. Then Charged System Search (CSS) optimization method which is a powerful optimization method is employed to optimize an objective function based on natural frequency to determine damage severity of damaged elements. To demonstrate the performance of the proposed method, a large double layer grid with 1536 elements and different single and multiple damage cases is considered. Numerical results show that the proposed method can successfully find damaged elements and their severities using only few first numbers of mode shapes and frequencies.
format	article
author	hamed teimouri Mohammad Reza Davoodi Seyed amin Mostafavian
author_facet	hamed teimouri Mohammad Reza Davoodi Seyed amin Mostafavian
author_sort	hamed teimouri
title	Detecting damage location and severity in a double layer grid using modal strain energy method and data fusion
title_short	Detecting damage location and severity in a double layer grid using modal strain energy method and data fusion
title_full	Detecting damage location and severity in a double layer grid using modal strain energy method and data fusion
title_fullStr	Detecting damage location and severity in a double layer grid using modal strain energy method and data fusion
title_full_unstemmed	Detecting damage location and severity in a double layer grid using modal strain energy method and data fusion
title_sort	detecting damage location and severity in a double layer grid using modal strain energy method and data fusion
publisher	Iranian Society of Structrual Engineering (ISSE)
publishDate	2020
url	https://doaj.org/article/70b1438754fb4daf8e32c89e5db0f16b
work_keys_str_mv	AT hamedteimouri detectingdamagelocationandseverityinadoublelayergridusingmodalstrainenergymethodanddatafusion AT mohammadrezadavoodi detectingdamagelocationandseverityinadoublelayergridusingmodalstrainenergymethodanddatafusion AT seyedaminmostafavian detectingdamagelocationandseverityinadoublelayergridusingmodalstrainenergymethodanddatafusion
_version_	1718441574780633088

Detecting damage location and severity in a double layer grid using modal strain energy method and data fusion

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