期刊
EUROPEAN JOURNAL OF ENVIRONMENTAL AND CIVIL ENGINEERING
卷 26, 期 10, 页码 4346-4373出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/19648189.2020.1848640
关键词
Acoustic emission (AE) technique; digital image correlation (DIC) technique; strain hardened concrete; damage mechanisms; crack classification
This study investigates the damage mechanisms of PVA fiber-reinforced concrete using both AE and DIC techniques. The combined use of these techniques has the potential to analyze crack bridging phenomenon, damage progression, and failure mechanism identification.
The crack formation, propagation and failure mechanism of concrete are very complex. Incorporation of fibers complicates it further, alters the damage characteristics of concrete. There is a consistent effort to impart the strain hardening properties, for which the special type of chemical fibers (Polyvinyl alcohol, PVA) is found to be very promising. Presently, an attempt has been made to understand the damage mechanisms of PVA fibers incorporated concrete (with three fibre dosages (0%, 1%, 2%) subjected to flexural loading using both contact (Acoustic Emission, AE) and noncontact (Digital Image Correlation, DIC) techniques. The advantages of AE which provides information on internal cracking and DIC which provides surface crack characteristics information are suitably exploited in this study. It was found that the combined use of both techniques has the potential to investigate the crack bridging phenomenon, to analyse the damage progression during loading, and to identify the critical failure mechanism and damage classification.
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