A comparison of modal flexibility method and modal curvature method in structural damage detection

Vibration based damage detection techniques examines the changes in dynamic properties of a structure such as frequency, mode shape and damping to indicate the presence of damage. This method is preferred for its ease of implementation, non-destructive nature and its ability to identify damage that...

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Bibliographic Details
Main Author:	Zaharudin, Noor Sabrina
Format:	Thesis
Language:	English
Published:	2010
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/15922/4/NoorSabrinaZaharudinMFKA2010.pdf
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id	my-utm-ep.15922
record_format	uketd_dc
spelling	my-utm-ep.159222017-09-19T07:28:01Z A comparison of modal flexibility method and modal curvature method in structural damage detection 2010-12 Zaharudin, Noor Sabrina TA Engineering (General). Civil engineering (General) Vibration based damage detection techniques examines the changes in dynamic properties of a structure such as frequency, mode shape and damping to indicate the presence of damage. This method is preferred for its ease of implementation, non-destructive nature and its ability to identify damage that is invisible to the surface. Two vibration based damage detection methods are used in this study, namely Modal Flexibility Method and Modal Curvature Method. Although there have been numerous publications on these two methods, there is lack of study on the direct comparison of the methods. Finite element modal analysis of a reinforced concrete slab and steel frame was carried out to obtain the dynamic responses that were used to calculate the Modal Flexibility and Modal Curvature. The structural models were simulated using four damage cases: damage at single location, damage at multiple locations, damage at support location and damage at different damage severities. The comparison of the sensitivity and reliability of Modal Flexibility and Modal Curvature were evaluated using the results of these four damage cases. The results show that the sensitivity and reliability of both methods are affected by the size of the damaged area, its location relative to the support location and the number of damaged segments. 2010-12 Thesis http://eprints.utm.my/id/eprint/15922/ http://eprints.utm.my/id/eprint/15922/4/NoorSabrinaZaharudinMFKA2010.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Zaharudin, Noor Sabrina A comparison of modal flexibility method and modal curvature method in structural damage detection
description	Vibration based damage detection techniques examines the changes in dynamic properties of a structure such as frequency, mode shape and damping to indicate the presence of damage. This method is preferred for its ease of implementation, non-destructive nature and its ability to identify damage that is invisible to the surface. Two vibration based damage detection methods are used in this study, namely Modal Flexibility Method and Modal Curvature Method. Although there have been numerous publications on these two methods, there is lack of study on the direct comparison of the methods. Finite element modal analysis of a reinforced concrete slab and steel frame was carried out to obtain the dynamic responses that were used to calculate the Modal Flexibility and Modal Curvature. The structural models were simulated using four damage cases: damage at single location, damage at multiple locations, damage at support location and damage at different damage severities. The comparison of the sensitivity and reliability of Modal Flexibility and Modal Curvature were evaluated using the results of these four damage cases. The results show that the sensitivity and reliability of both methods are affected by the size of the damaged area, its location relative to the support location and the number of damaged segments.
format	Thesis
qualification_level	Master's degree
author	Zaharudin, Noor Sabrina
author_facet	Zaharudin, Noor Sabrina
author_sort	Zaharudin, Noor Sabrina
title	A comparison of modal flexibility method and modal curvature method in structural damage detection
title_short	A comparison of modal flexibility method and modal curvature method in structural damage detection
title_full	A comparison of modal flexibility method and modal curvature method in structural damage detection
title_fullStr	A comparison of modal flexibility method and modal curvature method in structural damage detection
title_full_unstemmed	A comparison of modal flexibility method and modal curvature method in structural damage detection
title_sort	comparison of modal flexibility method and modal curvature method in structural damage detection
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2010
url	http://eprints.utm.my/id/eprint/15922/4/NoorSabrinaZaharudinMFKA2010.pdf
_version_	1747814998073147392

A comparison of modal flexibility method and modal curvature method in structural damage detection

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