Localized failure of concrete in compression identified by AE method

When concrete is subjected to uniaxial compression, the failure process is normally initialed from a localized zone. The localization of failure governs structural behaviors of concrete. In particular, the post-peak region of load–deformation curve is greatly affected. Therefore, it is necessary to...

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Bibliographic Details
Published in:Construction & building materials 2004-04, Vol.18 (3), p.189-196
Main Authors: Watanabe, Ken, Niwa, Junichiro, Iwanami, Mitsuyasu, Yokota, Hiroshi
Format: Article
Language:English
Subjects:
Acoustic emission
Concrete
Failure zone
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Summary:When concrete is subjected to uniaxial compression, the failure process is normally initialed from a localized zone. The localization of failure governs structural behaviors of concrete. In particular, the post-peak region of load–deformation curve is greatly affected. Therefore, it is necessary to investigate the extent of the localized failure zone in compression. In this study, acoustic emission (AE) method is applied to distinguish the damage level of concrete, because the method can be applied to quantify the damage in concrete structures. The length of compressive failure zone is quantified by AE activity, which is compared with visual observation of cracks, the distribution of the local energy consumption by the acrylic rod method, and the calculated length by the simplified relation. Then, AE method is applied to a reinforced concrete deep beam which fails under shear compression, and of which two dimensional failure zone is identified.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2003.10.008