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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Acoustic Transmission Technique for Evaluating Fatigue Damage in Concrete Bridge Deck Slabs
Author(s): Stephen D. Butt, Vidyadhar Limaye, Aftab A. Mufti, and Baidar Bakht
Publication: Structural Journal
Appears on pages(s): 3-10
Keywords: bridge deck; crack; fatigue; slab
Abstract:The investigation focuses on the evaluation of a novel acoustic transmission technique (ATT) for tracking the fatigue-induced damage in a steel-free bridge deck slab under laboratory conditions. The technique comprises the identification of changes in acoustic waveform attenuation through concrete by comparing integrated waveform amplitudes recorded at two or more acoustic sensors. This methodology is based on the experimental observation that cracking in concrete leads to increases in attenuation of the acoustic signals. The mapping of cracks and other means of detecting damage induced by cracks were used to independently verify the conclusions from the ATT. Each of the four deck slab panels was subjected to approximately 1700 cycles of a heavy wheel load; the damage induced by this loading was tracked reliably by the ATT. The procedure of evaluating dimensionless integrated amplitude ratios rather than absolute signal magnitudes proved to be a highly robust and stable means of measuring attenuation, hence damage in the slab.
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