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- W4310014949 abstract "To better understand the long-term mechanical performance of glass fiber reinforced polymer (GFRP) bars under aggressive environments, tensile testing was conducted on GFRP bars after exposure to two environmental conditions: 1) immersed in alkaline and saline solutions both for 180 days; and 2) embedded in sustain-loaded concrete beams with or without NaCl solution wet-dry cycles for 366 days. Experimental results revealed that the failure modes and stress-strain curves of tested GFRP bars exhibited similar characteristics regardless of above various aggressive conditions and exposure periods. As to specimens immersed in solutions for 180 days, the degradation of tensile performance in saline solution was smaller than that in alkaline solution. Furthermore, no significant degradation of elastic modulus was observed in the experiment. For GFRP bars embedded in sustain-loaded concrete beams, the average retention of tensile strength was around 93% after one-year experience in concrete, which was nearly 5.0% lower than that of non-stressed GFRP bars in concrete. It is predicted from a comparative study that the degradation of GFRP bar placed in concrete (100% moist) for 7.5 years was equivalent to that exposed to alkaline solution for one year. Based on SEM observations, the degradation mechanism of tensile performance for GFRP bars was attributed to the reduction of bonding between fiber and matrix. Moreover, according to the Fib bulletin 40 method, the tensile strength retention of GFRP bar was predicted to be ranged from 62.8% to 75.1% after 100 years of service under various conditions." @default.
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- W4310014949 date "2023-04-01" @default.
- W4310014949 modified "2023-10-15" @default.
- W4310014949 title "Long-term tensile performance of GFRP bars in loaded concrete and aggressive solutions" @default.
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- W4310014949 doi "https://doi.org/10.1016/j.jobe.2022.105587" @default.
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