Cohesive Fracture and Fiber Pullout Responses in Normal and SCC Fiber–Reinforced Concrete
Publication: Journal of Engineering Mechanics
Volume 147, Issue 12
Abstract
The link between the fracture behavior of fiber–reinforced concrete composite and the underlying mechanisms that influence the pullout behavior of fiber are studied. The influence of the fiber-matrix bond on the cohesive stress response in fracture is evaluated for normal vibration compacted concrete (NC) and self-compacting concrete (SCC) matrixes. The fracture response of steel fiber–reinforced SCC (SFSCC) improves significantly when compared with steel fiber–reinforced NC (SFNC). The cohesive stress-crack opening () relationship derived from the measured fracture responses indicates that a significantly higher crack closing stress is generated at smaller crack opening in SFSCC than SFNC. The pullout resistance of the steel fiber embedded in the SCC matrix improves significantly compared with NC. The enhancements in the cohesive debonding and frictional components of resistance contribute to the improved pullout resistance of the steel fiber from SCC. The improvement in the fiber-SCC matrix bond results in increased efficiency of the fibers and produces an increase in stiffness and peak load in the resistance to the pullout of fiber from the SCC matrix when compared with NC. The enhancement in the pullout response of the fibers from SCC contributes to improvements in the cohesive stress mobilized at smaller crack openings in SFSCC.
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Data Availability Statement
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Acknowledgments
The authors would like to acknowledge support from Mr. K. Chiranjeevi Reddy for data interpretation and inversion analysis. The authors’ contributions to this paper are as follows: Manjunath V. Bhogone contributed Methodology, Investigation, and Writing in the original draft; Silpa S. Pazhankave contributed Methodology and Investigation; and Kolluru V. L. Subramaniam reviewed and edited Conceptualization and Writing, and editing for Supervision.
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Published In
Journal of Engineering Mechanics
Volume 147 • Issue 12 • December 2021
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© 2021 American Society of Civil Engineers.
History
Received: Apr 5, 2021
Accepted: Aug 12, 2021
Published online: Sep 28, 2021
Published in print: Dec 1, 2021
Discussion open until: Feb 28, 2022
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