A New Modal Based Damage Detection Approach utilising Added Mass

Xu, Y; Samali, B; Li, J

A New Modal Based Damage Detection Approach utilising Added Mass

Xu, Y Samali, B Li, J

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Publisher:: Taylor & Francis Group
Publication Type:: Conference
Citation:: Xu You-Lin, Samali Bijan, and Li Jianchun 2009, 'A New Modal Based Damage Detection Approach utilising Added Mass', , Taylor & Francis Group, USA, , pp. 789-793.
Issue Date:: 2009

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Field	Value	Language
dc.contributor.author	Xu, Y	en_US
dc.contributor.author	Samali, B	en_US
dc.contributor.author	Li, J	en_US
dc.contributor.editor	Editor(s): Thiru Aravinthan; Warna (Karu) Karunasena; Hao Wang	en_US
dc.date	20081202	en_US
dc.date.accessioned	2010-05-28T10:01:58Z
dc.date.available	2010-05-28T10:01:58Z
dc.date.issued	2009	en_US
dc.identifier	2008007031	en_US
dc.identifier.citation	Xu You-Lin, Samali Bijan, and Li Jianchun 2009, 'A New Modal Based Damage Detection Approach utilising Added Mass', , Taylor & Francis Group, USA, , pp. 789-793.	en_US
dc.identifier.issn	9780415491969	en_US
dc.identifier.other	E1	en_US
dc.identifier.uri	http://hdl.handle.net/10453/11119
dc.description.abstract	To reliably detect structural damage and estimate damage severity at its early stage poses a great challenge to engineering community. Despite a great deal of research and development in the areas of damage detection and health monitoring, there are very few successful applications in real life damage detection in engineering practices. One of the main obstacles for successful application of damage detection algorithms to real life civil infrastructure is the complex nature of structures and the uncertainties associated with modelling and measurement. This paper presents a new modal based damage detection approach aiming to provide an effective means to improve reliability and accuracy of damage detection. The proposed approach requires measurement data from two states of the structure, ie, data from the structure â¿¿as-isâ¿ and data from the structure after adding a known mass. By means of experimental modal analysis (EMA), the modal parameters of the structure with and without added mass can be obtained. With modal parameters of the said two states and the known added mass, the proposed method will be able to produce the â¿¿in-serviceâ¿ system stiffness matrix. With the element connectivity being known a priori (or assumed reasonably), the â¿¿inserviceâ¿ element stiffness can be obtained. Location of damage as well as damage severity of the structure will therefore be known. Experimental verification of the proposed method was carried out using a three storey shear building model. The experimental results show that the proposed damage detection method is superior in both damage localisation and damage severity estimation.	en_US
dc.publisher	Taylor & Francis Group	en_US
dc.relation.ispartof	Verified OK	en_US
dc.relation.ispartof	Futures in Mechanics of Structures and Materials, Australasian Conference on the Mechanics of Structures and Materials (ACMSM20)	en_US
dc.relation.isbasedon	NA	en_US
dc.subject.classification	Structural Engineering	en_US
dc.title	A New Modal Based Damage Detection Approach utilising Added Mass	en_US
dc.type	Conference
utslib.location	USA	en_US
utslib.citation.startpage	789	en_US
utslib.citation.endpage	793	en_US
utslib.identifier.org	FEIT.School of Elec, Mech and Mechatronic Systems	en_US
utslib.for	090506	en_US
utslib.percentage	000100	en_US
dc.location.activity	Toowoomba, Queensland, Australia	en_US
utslib.copyright.status	closed_access

Abstract:

To reliably detect structural damage and estimate damage severity at its early stage poses a great challenge to engineering community. Despite a great deal of research and development in the areas of damage detection and health monitoring, there are very few successful applications in real life damage detection in engineering practices. One of the main obstacles for successful application of damage detection algorithms to real life civil infrastructure is the complex nature of structures and the uncertainties associated with modelling and measurement. This paper presents a new modal based damage detection approach aiming to provide an effective means to improve reliability and accuracy of damage detection. The proposed approach requires measurement data from two states of the structure, ie, data from the structure â¿¿as-isâ¿ and data from the structure after adding a known mass. By means of experimental modal analysis (EMA), the modal parameters of the structure with and without added mass can be obtained. With modal parameters of the said two states and the known added mass, the proposed method will be able to produce the â¿¿in-serviceâ¿ system stiffness matrix. With the element connectivity being known a priori (or assumed reasonably), the â¿¿inserviceâ¿ element stiffness can be obtained. Location of damage as well as damage severity of the structure will therefore be known. Experimental verification of the proposed method was carried out using a three storey shear building model. The experimental results show that the proposed damage detection method is superior in both damage localisation and damage severity estimation.

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http://hdl.handle.net/10453/11119