Investigation of Ultrahigh-Performance Concrete Fracture Characteristics with Different Steel Fiber Fractions Based on Acoustic Emission
Publication: Journal of Materials in Civil Engineering
Volume 35, Issue 12
Abstract
Three-point bending test and acoustic emission (AE) monitoring of notched beams with different volume fractions of steel fiber ultrahigh-performance concrete (UHPC) were carried out. The results show that the initiation toughness, unstable toughness, and fracture energy of UHPC notched beams increase at first and then decrease with the increase of fiber fraction. Based on the stress intensity factor theory, the simplified formulas for calculating initiation toughness and fracture energy were derived. The acoustic emission signal of the UHPC notched beam fracture process was analyzed, and the characteristics of the UHPC material fracture process were characterized by AE energy and cumulative count. Based on the excellent correlation between AE signal and fracture characteristics, it was found that there is an excellent linear relationship between AE energy and fracture energy, and the relationship between cumulative count and crack mouth opening displacement was established.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work was financially supported by the Programme of Introducing Talents of Discipline to Universities (i.e., the 111 Project of China, Grant No. D20015) and the 111 Project of Hubei Province (Grant No. 2021EJD026).
Author contributions: Qing Wang: conceptualization, methodology, resources, and project administration; Xiaoxiao Bao: completion of the experiments, writing—original draft, and data curation; Jian Yang: writing—review and editing; Gang Xu: conceptualization, methodology, supervision, and writing—review and editing; and Meng Zhang: design of the experiments and completion of the experiments.
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Published In
Journal of Materials in Civil Engineering
Volume 35 • Issue 12 • December 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Oct 13, 2022
Accepted: Apr 25, 2023
Published online: Sep 22, 2023
Published in print: Dec 1, 2023
Discussion open until: Feb 22, 2024
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