STP1353

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

    Published: Jan 1999


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    Abstract

    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.

    Keywords:

    acoustic emission, cyclic loading test, evaluation criteria, Kaiser effect, reinforced concrete, structural integrity


    Author Information:

    Yuyama, S
    President, Nippon Physical Acoustics Ltd., Higashi, Shibuya-ku, Tokyo

    Okamoto, T
    Chief researcher, Central Research Laboratory, Nihon Cement Co., Ltd., Tokyo,

    Shigeishi, M
    Associate professor and professor, Faculty of Engineering, Kumamoto University, Kumamoto,

    Ohtsu, M
    Associate professor and professor, Faculty of Engineering, Kumamoto University, Kumamoto,

    Kishi, T
    Professor, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo,


    Paper ID: STP15778S

    Committee/Subcommittee: E07.04

    DOI: 10.1520/STP15778S


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