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Effect of loading rates on bond behaviour between basalt fibre-reinforced polymer bars and concrete
https://orcid.org/0000-0003-3441-5805
https://orcid.org/0000-0003-4743-540X
Highlights Bond performance between BFRP bars and sea sand concrete is tested. Loading rates representing static, earthquake and impact loads are considered. The failure mode and bond mechanism are summarized. The bond strength, slip, and bond stress-slip curve are discussed. Formulae of dynamic influence factor are proposed.
Abstract In this study, bond performance between basalt fibre-reinforced polymer bars and sea sand concrete was investigated using pull-out tests that considered two parameters, loading rate and concrete type. All pull-out specimens exhibited a pull-out failure mode. Moreover, bond mechanism, bond strength, slip, and bond stress–slip curve are discussed. The bond behaviour was found to be sensitive to the loading rate. The bond mechanism was controlled by mechanical interlocking at static loading rate, friction at the earthquake loading rate, and chemical adhesion and the shear strength of the fibre layers at impact loading rate. The bond strength with a high-speed loading rate was lower than that with a static loading rate. The variation trends for the bond strength and slip differed with the type of loading rate. Finally, formulae are proposed for estimating a dynamic influence factor, which is used to evaluate the influence of the strain rate on the bond strength and slip.
Effect of loading rates on bond behaviour between basalt fibre-reinforced polymer bars and concrete
https://orcid.org/0000-0003-3441-5805
https://orcid.org/0000-0003-4743-540X
Highlights Bond performance between BFRP bars and sea sand concrete is tested. Loading rates representing static, earthquake and impact loads are considered. The failure mode and bond mechanism are summarized. The bond strength, slip, and bond stress-slip curve are discussed. Formulae of dynamic influence factor are proposed.
Abstract In this study, bond performance between basalt fibre-reinforced polymer bars and sea sand concrete was investigated using pull-out tests that considered two parameters, loading rate and concrete type. All pull-out specimens exhibited a pull-out failure mode. Moreover, bond mechanism, bond strength, slip, and bond stress–slip curve are discussed. The bond behaviour was found to be sensitive to the loading rate. The bond mechanism was controlled by mechanical interlocking at static loading rate, friction at the earthquake loading rate, and chemical adhesion and the shear strength of the fibre layers at impact loading rate. The bond strength with a high-speed loading rate was lower than that with a static loading rate. The variation trends for the bond strength and slip differed with the type of loading rate. Finally, formulae are proposed for estimating a dynamic influence factor, which is used to evaluate the influence of the strain rate on the bond strength and slip.
Effect of loading rates on bond behaviour between basalt fibre-reinforced polymer bars and concrete
https://orcid.org/0000-0003-3441-5805
https://orcid.org/0000-0003-4743-540X
Highlights Bond performance between BFRP bars and sea sand concrete is tested. Loading rates representing static, earthquake and impact loads are considered. The failure mode and bond mechanism are summarized. The bond strength, slip, and bond stress-slip curve are discussed. Formulae of dynamic influence factor are proposed.
Abstract In this study, bond performance between basalt fibre-reinforced polymer bars and sea sand concrete was investigated using pull-out tests that considered two parameters, loading rate and concrete type. All pull-out specimens exhibited a pull-out failure mode. Moreover, bond mechanism, bond strength, slip, and bond stress–slip curve are discussed. The bond behaviour was found to be sensitive to the loading rate. The bond mechanism was controlled by mechanical interlocking at static loading rate, friction at the earthquake loading rate, and chemical adhesion and the shear strength of the fibre layers at impact loading rate. The bond strength with a high-speed loading rate was lower than that with a static loading rate. The variation trends for the bond strength and slip differed with the type of loading rate. Finally, formulae are proposed for estimating a dynamic influence factor, which is used to evaluate the influence of the strain rate on the bond strength and slip.
Effect of loading rates on bond behaviour between basalt fibre-reinforced polymer bars and concrete
Wei, Wei (author) / Liu, Feng (author) / Xiong, Zhe (author) / Yang, Fei (author) / Li, Lijuan (author) / Luo, Hanwei (author)
2019-10-02
Article (Journal)
Electronic Resource
English