Evaluation of strain energy based damage indices for flexural crack detection of RC beams

Wahalathantri, Buddhi Lankananda, Thambiratnam, David, Chan, Tommy H.T., & Fawzia, Sabrina (2012) Evaluation of strain energy based damage indices for flexural crack detection of RC beams. In Tong, Nguyen Thien, Hung, Nguyen Xuan, Trung, Nguyen Thoi, & Thanh, Chau Dinh (Eds.) ACOME 2012 : Proceedings of the International Conference on Advances in Computational Mechanics, Tri Thuc Publisher, Ho Chi Minh City, Vietnam, pp. 421-433.

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Vibration Based Damage Identification Techniques which use modal data or their functions, have received significant research interest in recent years due to their ability to detect damage in structures and hence contribute towards the safety of the structures. In this context, Strain Energy Based Damage Indices (SEDIs), based on modal strain energy, have been successful in localising damage in structuers made of homogeneous materials such as steel. However, their application to reinforced concrete (RC) structures needs further investigation due to the significant difference in the prominent damage type, the flexural crack. The work reported in this paper is an integral part of a comprehensive research program to develop and apply effective strain energy based damage indices to assess damage in reinforced concrete flexural members. This research program established (i) a suitable flexural crack simulation technique, (ii) four improved SEDI's and (iii) programmable sequentional steps to minimise effects of noise. This paper evaluates and ranks the four newly developed SEDIs and existing seven SEDIs for their ability to detect and localise flexural cracks in RC beams. Based on the results of the evaluations, it recommends the SEDIs for use with single and multiple vibration modes.

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ID Code: 58896
Item Type: Conference Paper
Refereed: Yes
Keywords: Strain Energy, Damage Index, Damage Localization, Flexural Cracks, RCC Beam, False Alarms
ISBN: 9786049085772
Divisions: Current > Schools > School of Civil Engineering & Built Environment
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 Tri Thuc Publisher
Deposited On: 09 Apr 2013 23:31
Last Modified: 11 Apr 2013 19:06

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