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Long-time durability of GFRP bars in the alkaline concrete environment for eight years
Highlights The long-term degradation law of tensile strength of GFRP bars was studied. Alkaline environment, sustained loads, and working cracks were considered. The accuracy of existing tensile strength prediction model of GFRP bar was evaluated. The long-term tensile strength prediction model of GFRP bars was improved.
Abstract The long-term durability of glass fiber reinforced polymer (GFRP) bars under different conditioning environments is investigated in this paper. A batch of GFRP bars exposed to alkaline accelerated corrosion concrete environment for 8 years is studied. The long-term tensile strength degradation law/micro deterioration mechanism are analyzed, and the tensile strength prediction model of GFRP bars is established. By comparing the estimated results with the long-term experimental data, it is found that the prediction model fits the first stage degradation data of GFRP bars well and has high accuracy. However, the long-term durability of GFRP bars is significantly underestimated based on the prediction results in the second stage, so an improved long-term tensile strength prediction model is proposed. Finally, the 8-year residual tensile strength of GFRP bars is evaluated according to three current codes.
Long-time durability of GFRP bars in the alkaline concrete environment for eight years
Highlights The long-term degradation law of tensile strength of GFRP bars was studied. Alkaline environment, sustained loads, and working cracks were considered. The accuracy of existing tensile strength prediction model of GFRP bar was evaluated. The long-term tensile strength prediction model of GFRP bars was improved.
Abstract The long-term durability of glass fiber reinforced polymer (GFRP) bars under different conditioning environments is investigated in this paper. A batch of GFRP bars exposed to alkaline accelerated corrosion concrete environment for 8 years is studied. The long-term tensile strength degradation law/micro deterioration mechanism are analyzed, and the tensile strength prediction model of GFRP bars is established. By comparing the estimated results with the long-term experimental data, it is found that the prediction model fits the first stage degradation data of GFRP bars well and has high accuracy. However, the long-term durability of GFRP bars is significantly underestimated based on the prediction results in the second stage, so an improved long-term tensile strength prediction model is proposed. Finally, the 8-year residual tensile strength of GFRP bars is evaluated according to three current codes.
Long-time durability of GFRP bars in the alkaline concrete environment for eight years
Wu, Weiwei (author) / He, Xiongjun (author) / Yang, Wenrui (author) / Dai, Li (author) / Wang, Yingang (author) / He, Jia (author)
2021-11-04
Article (Journal)
Electronic Resource
English
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