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An improved modal strain energy method for damage assessment

Wahalathantri, Buddhi Lankananda, Thambiratnam, David, Chan, Tommy H.T., & Fawzia, Sabrina (2010) An improved modal strain energy method for damage assessment. In Topping, B.H.V., Adam , J.M., Pallarés, F.J., Bru, R., & Romero, M.L. (Eds.) Proceedings of the Tenth International Conference on Computational Structures Technology, Civil-Comp Press, Universidad Politécnica de Valencia, Spain.

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Abstract

The modal strain energy method, which depends on the vibration characteristics of the structure, has been reasonably successful in identifying and localising damage in the structure. However, existing strain energy methods require the first few modes to be measured to provide meaningful damage detection. Use of individual modes with existing strain energy methods may indicate false alarms or may not detect the damage at or near the nodal points. This paper proposes a new modal strain energy based damage index which can detect and localize the damage using any one of the modes measured and illustrates its application for beam structures. It becomes evident that the proposed strain energy based damage index also has potential for damage quantification.

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ID Code: 37700
Item Type: Conference Paper
Keywords: Civil Engineering, Structural Health Monitoring , Damage Detection
DOI: 10.4203/ccp.93.53
ISBN: 9781905088362
ISSN: 1759-3433
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Copyright Owner: Copyright 2010 Civil-Comp Limited
Deposited On: 05 Oct 2010 08:12
Last Modified: 01 Mar 2012 00:21

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