Bond behavior of corroded reinforcement in concrete wrapped with carbon fiber reinforced polymer under cyclic loading

作者：Dai, Xiao Dong; Wang, Xiao Hui; Kou, Xin Jian

来源：Journal of Shanghai Jiaotong University (Science), 2013, 18(3): 271-277.

DOI：10.1007/s12204-013-1393-2

• Carbon fiber reinforced polymer
• Concrete specimens
• Corroded reinforcement
• Cylindrical concrete
• Electrolyte corrosion
• Experimental parameters
• Hysteresis curve
• Hysteretic curve

Bond behavior of corroded reinforcement in concrete wrapped with carbon fiber reinforced polymer (CFRP) under cyclic loading is experimentally investigated. An electrolyte corrosion technique is used to accelerate the corrosion of the steel bar in cylindrical concrete specimens. Wrapped specimens are strengthened with one layer of CFRP after the reinforcements are corroded. The experimental parameters investigated include: corrosion level, CFRP wrapped and number of loading cycles. Test results indicate that bond strength and area of hysteretic curve of CFRP wrapped specimens are larger than those of the unwrapped specimens. With increasing the number of loading cycles, the bond strength and area of hysteretic curve decrease gradually, especially at the 1st cyclic loading. The CFRP wrapping reduces the bond degradation rate effectively and prevents the bond-splitting failure of the corroded concrete specimens.

• 出版日期2013
• 单位上海交通大学