SYMPOSIA PAPER Published: 01 January 1999

A Proposed Standard for Evaluating Structural Integrity of Reinforced Concrete Beams by Acoustic Emission


A series of studies has been performed to evaluate the structural integrity of reinforced concrete (RC) beams by acoustic emission (AE). Cyclic loadings were applied to RC beams with a single reinforcing bar, large repaired beams, beams deteriorated due to corrosion of reinforcement, and two beams with different damage levels in an aging dock. The test results demonstrated that the Kaiser effect starts to break down when shear cracking starts to play a primary role. It has been also shown that high AE activity is observed during unloadings after serious damage (slips between the concrete and the reinforcement or those between the original concrete and the repaired part) has occurred. A standard for evaluating structural integrity of RC beams by AE is proposed, based on these results.

Author Information

Yuyama, S
Nippon Physical Acoustics Ltd., Higashi, Shibuya-ku, Tokyo, Japan
Okamoto, T
Central Research Laboratory, Nihon Cement Co., Ltd., Tokyo, Japan
Shigeishi, M
Faculty of Engineering, Kumamoto University, Kumamoto, Japan
Ohtsu, M
Faculty of Engineering, Kumamoto University, Kumamoto, Japan
Kishi, T
Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
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Developed by Committee: E07
Pages: 25–40
DOI: 10.1520/STP15778S
ISBN-EB: 978-0-8031-5402-5
ISBN-13: 978-0-8031-2498-1