Numerical Investigation of the Bond-Slip Behavior between Double-Helix BFRP Macrofibers and Concrete
Publication: Journal of Materials in Civil Engineering
Volume 36, Issue 12
Abstract
Basalt fiber–reinforced polymer (BFRP) is widely used to reinforce concrete due to its high strength, lightweight nature, good corrosion resistance, and low cost. Previous studies have shown that the double-helix BFRP macrofiber has better bond behavior with concrete compared with other types of BFRP fibers. This is attributed to its irregular geometry. The bond-slip behavior between double-helix BFRP macrofiber and concrete is further numerically studied in this study. The corresponding finite-element model is established, and the accuracy of the numerical method is validated by the experimental results based on fiber-matrix pullout tests. The effects of twisted pitches, bundle numbers, and cross-section shapes of the fiber on the bond-slip behavior are extensively investigated and discussed. It is shown by the numerical results that the bond stress and energy-dissipating capacity increase with the decrease of twisted pitches (30, 20, 10, and 5 mm). The bond stress of the fiber with a twisted pitch of 5 mm can be increased by 17.0% at most compared with the fiber with a twisted pitch of 30 mm. Furthermore, it is found that the double-helix BFRP fiber has higher bond stress than the fiber with three or four bundles, with corresponding increases of 11.9% and 16.9%, respectively.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors would like to acknowledge financial support from the National Natural Science Foundation of China (Grant No. 52208498), the China Postdoctoral Science Foundation (Grant No. 2023M732608), the Tianjin Nature Science Foundation (Grant No. 23JCQNJC00900), the Postdoctoral Fellowship Program of CPSF under Grant No. GZC20231359, and the “Spring Sunshine Plan” cooperative research project of the Ministry of Education of China (Grant No. HZKY20220593).
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Published In
Journal of Materials in Civil Engineering
Volume 36 • Issue 12 • December 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Jan 2, 2024
Accepted: Apr 26, 2024
Published online: Oct 3, 2024
Published in print: Dec 1, 2024
Discussion open until: Mar 3, 2025
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