Assessing Damage in Corroded Reinforced Concrete Using Acoustic Emission
Publication: Journal of Engineering Mechanics
Volume 126, Issue 3
Abstract
The acoustic emission (AE) behavior of reinforced concrete beams tested under flexural loading was investigated to characterize and identify different sources of damage including microcrack development, localized crack propagation, and debonding of the reinforcing steel. By testing plain, notched-plain, reinforced, and corroded-reinforced specimens, different damage mechanisms were isolated and characterized. AE events were analyzed using conventional AE parameters. In addition, waveform analysis was conducted using both fast Fourier transform and wavelet transform methods. AE event rate and AE generation behavior showed different aspects depending on the degree of corrosion of reinforcing steel. The results of the cross-plot, typically amplitude versus duration, showed a clear difference with each stage of damage. Both AE parameter analysis and waveform analysis exhibited a favorable correlation with the condition of damage in the reinforced concrete beams. As a result, AE may provide a promising method to estimate the damage of reinforced concrete structures.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 126 • Issue 3 • March 2000
Pages: 273 - 283
History
Received: May 21, 1999
Published online: Mar 1, 2000
Published in print: Mar 2000
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