A new non-destructive damage detection method for reinforced concrete beams based on modal strain energy

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Conference Proceeding
Futures in Mechanics of Structures and Materials - Proceedings of the 20th Australasian Conference on the Mechanics of Structures and Materials, ACMSM20, 2008, pp. 773 - 779
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This paper presents a new non-destructive damage detection algorithm to predict locations and severities of damage in concrete beams based on modal strain energy. The new method only relies on the measured mode shapes from damaged and undamaged states. Furthermore, theoretical development of the new method requires only a simple assumption, that is, structural mass invariability before and after damage. After brief introduction of the new method, Finite Element (FE) models of RC beam are constructed. Structural vibration response time histories of RC beam models are obtained from transient analysis under impact loading. To simulate real life applications, various levels of noise are added to the response time histories. The results from both numerical work and experimental work show that the new method is not only sensitive to damage, but also simple and robust in locating and estimating the severity of damage. © 2009 Taylor & Francis Group, London.
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