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Abstract In order to analyze the bond slip characteristics of basalt fiber-reinforced steel bars and the long-term bond slip time-varying behaviors of reinforced concrete exposed to marine environments, the effects of bar size, corrosion age, and concrete strength of the Basalt fiber-reinforced polymer (BFRP) on the bond slip behavior of BFRP bars in concrete under artificial seawater were studied. An improved Bertero-Popov-Eligehausen (BPE) model was used to describe the bond slip behavior of BFRP bars. The results showed that as the diameter of BFRP bars increased, the ultimate bond strength and corresponding slip between BFRP bars and geopolymer concrete gradually decreased, and the ultimate slip and corresponding bond strength also gradually decreased. After 90 days of seawater corrosion, the ultimate bond strength and corresponding slip decreased, and the bond slip curve showed a horizontal section. Improving the concrete strength grade was beneficial for improving the bond performance between BFPR bars and concrete in seawater environment. The improved BPE model was more suitable for characterizing the bond slip between BFRP bars and concrete. After seawater corrosion, the rising section of the curve tended to be more rigid, and the falling section of the curve tended to be more flexible.
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2023, Vol. 36 
