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Volume 11
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10.3390/buildings11090398
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Article

Experimental, Analytical and Numerical Studies of Interfacial Bonding Properties between Silane-Coated Steel Fibres and Mortar

by
Yong Yao
1,
Hui Zhang
2,
Xin Zhang
1,
Feifan Ren
3,
Yaqi Li
2 and
Zhenjun Yang
2,*
1
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
2
Hubei Key Laboratory of Geotechnical and Structural Safety, School of Civil Engineering, Wuhan University, Wuhan 430072, China
3
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
*
Author to whom correspondence should be addressed.
Buildings 2021, 11(9), 398; https://doi.org/10.3390/buildings11090398
Submission received: 26 July 2021 / Revised: 24 August 2021 / Accepted: 1 September 2021 / Published: 6 September 2021
(This article belongs to the Section Building Energy, Physics, Environment, and Systems)
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Abstract

A systematic investigation of the effects of silane coatings on steel fibre–mortar interfacial bond properties was conducted, combining pullout tests, analytical solutions, and meso-scale FE simulations. Nine silane coatings were tested, and their effects were evaluated by 30 single fibre pullout tests. They were found to increase the peak force and energy consumption up to 5.75 times and 2.48 times, respectively. Closed-form analytical solutions for pullout load, displacement, and interfacial stress distribution during the whole pullout process were derived based on a tri-linear bond-slip model, whose parameters were calibrated against the pullout tests. Finally, the calibrated bond-slip models were used to simulate the pullout tests and complex failure of multi-fibre specimens in mesoscale finite element models. Such an approach of combining pullout tests, analytical solutions, and mesoscale modelling provides a reliable way to investigate the effects of fibre–mortar interfacial properties on the mechanical behaviour of steel fibre reinforced concrete members in terms of structural strength, stiffness, ductility, and failure mechanisms.
Keywords: silane coating; bond-slip relationship; single fibre pullout; meso-scale modeling; steel fibre reinforced concrete silane coating; bond-slip relationship; single fibre pullout; meso-scale modeling; steel fibre reinforced concrete

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MDPI and ACS Style

Yao, Y.; Zhang, H.; Zhang, X.; Ren, F.; Li, Y.; Yang, Z. Experimental, Analytical and Numerical Studies of Interfacial Bonding Properties between Silane-Coated Steel Fibres and Mortar. Buildings 2021, 11, 398. https://doi.org/10.3390/buildings11090398

AMA Style

Yao Y, Zhang H, Zhang X, Ren F, Li Y, Yang Z. Experimental, Analytical and Numerical Studies of Interfacial Bonding Properties between Silane-Coated Steel Fibres and Mortar. Buildings. 2021; 11(9):398. https://doi.org/10.3390/buildings11090398

Chicago/Turabian Style

Yao, Yong, Hui Zhang, Xin Zhang, Feifan Ren, Yaqi Li, and Zhenjun Yang. 2021. "Experimental, Analytical and Numerical Studies of Interfacial Bonding Properties between Silane-Coated Steel Fibres and Mortar" Buildings 11, no. 9: 398. https://doi.org/10.3390/buildings11090398

APA Style

Yao, Y., Zhang, H., Zhang, X., Ren, F., Li, Y., & Yang, Z. (2021). Experimental, Analytical and Numerical Studies of Interfacial Bonding Properties between Silane-Coated Steel Fibres and Mortar. Buildings, 11(9), 398. https://doi.org/10.3390/buildings11090398

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