Bond Behavior of Corroded Reinforcement in Concrete Wrapped with Carbon Fiber Reinforced Polymer Under Cyclic Loading

doi:10.1007/s12204-013-1393-2

摘要/Abstract

摘要： Abstract: 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.

关键词: carbon fiber reinforced polymer (CFRP), bond, corrosion, cyclic loading, hysteresis curve

Abstract: Abstract: 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.

Key words: carbon fiber reinforced polymer (CFRP), bond, corrosion, cyclic loading, hysteresis curve

中图分类号:

TU 5

DAI Xiao-dong* (代晓东), WANG Xiao-hui (王小惠), KOU Xin-jian (寇新建). Bond Behavior of Corroded Reinforcement in Concrete Wrapped with Carbon Fiber Reinforced Polymer Under Cyclic Loading[J]. 上海交通大学学报（英文版）, 2013, 18(3): 271-277.

DAI Xiao-dong* (代晓东), WANG Xiao-hui (王小惠), KOU Xin-jian (寇新建). Bond Behavior of Corroded Reinforcement in Concrete Wrapped with Carbon Fiber Reinforced Polymer Under Cyclic Loading[J]. Journal of shanghai Jiaotong University (Science), 2013, 18(3): 271-277.

参考文献

[1] Ismail M A F. Bond deterioration in reinforced concrete under cyclic loading [D]. Houston, Texas, USA: College of Engineering, Rice University, 1970.
[2] Panda A K. Bond of deformed bars in steel fiberreinforced concrete under cyclic loading [D]. Vancouver, Canada: College of Civil Engineering, University of British Columbia, 1984.
[3] Eligehausen R, Popov E P, Bertero V V. Local bond stress-slip relationships of deformed bars under generalized excitations [R]. Berkeley: University of California, 1983.
[4] Bal′azs G L. Fatigue of bond [J]. ACI Materials Journal, 1991, 88(6): 620-629.
[5] Alavi-Fard M, Marzouk H. Bond behavior of high strength concrete under reversed pull-out cyclic loading [J]. Canadian Journal of Civil Engineering, 2002, 29(2): 191-200.
[6] Li J, Gao X L, Zhang P. Experimental investigation on the bond of reinforcing bars in high performance concrete under cyclic loading [J]. Materials and Structures, 2007, 40(10): 1027-1044.
[7] Verderame G M, Ricci P, Carlo G D, et al. Cyclic bond behavior of plain bars. Part I. Experimental investigation [J]. Construction and Building Materials, 2009, 23(12): 3499-3511.
[8] Harajli M H. Bond stress-slip model for steel bars in unconfined or steel, FRC, or FRP confined concrete under cyclic loading [J]. Journal of Structural Engineering, 2009, 135(5): 509-518.
[9] Guizani L, Chaallal O. An experimental study on bond-slip in moderately confined concrete subjected to monotonic and cyclic loading using an experimental plan [J]. Canadian Journal of Civil Engineering, 2011, 38: 272-282.
[10] Fang C Q, Gylltoft K, Lundgren K, et al. Effect of corrosion on bond in reinforced concrete under cyclic loading [J]. Cement and Concrete Research, 2006, 36(3): 548-555.
[11] Kivell A, Palermo A, Scott A. Effects of bond deterioration due to corrosion in reinforced concrete [C]//Proceedings of the Ninth Pacific Conference on Earthquake Engineering, Building an Earthquake-Resilient Society. Auckland, New Zealand: PCEE, 2011: 1-8.
[12] Soudki K, Sherwood T. Bond behavior of corroded steel reinforcement in concrete wrapped with carbon fiber reinforced polymer sheets [J]. Journal of Materials in Civil Engineering, 2003, 15(4): 358-370.
[13] Papakonstantinou C G, Balaguru P N, Auyeung Y. Influence of FRP confinement on bond behavior of corroded steel reinforcement [J]. Cement and Concrete Composites, 2011, 33(5): 611-621.
[14] Wang X G, ZhangW P, CuiW, et al. Bond strength of corroded steel bars in reinforced concrete structural elements strengthened with CFRP sheets [J]. Cement and Concrete Composites, 2011, 33(4): 513-519.
[15] Zuo J, Daruin D. Bond slip of high relative rib area bars under cyclic loading [J]. ACI Structural Journal, 2000, 97(2): 331-334.
[16] Chen Liu-guo. Bond of corroded reinforcement and concrete [D]. Shanghai: Department of Civil Engineering, Shanghai Jiaotong University, 2004 (in Chinese).
[17] Rteil A. Fatigue bond behavior of corroded reinforcement and CFRP confined concrete [D]. Ontario, Canada: College of Engineering, Waterloo University, 2007.