Abstract: In order to explore the effects caused by variable load and chloride environment on the mechanical properties of each steel strand in cables even to predict their corrosion fatigue life. In this paper, a salt spray corrosion test is set up to simulate the corrosion process of steel strands under the couple effect of chloride environment and variable load with different stress amplitude. and the corrosion laws of steel strands are obtained by proposing grayscale analysis on the cables. The corrosion degrees of the steel strands are divided according to the gray treatment solution. The results show that The steel strand outside of the cable is more likely to corrode than the steel strand inside of the cable,and the corrosion degree is related to the stress amplitude. with the stress amplitude applied on the steel strand increased, the corrosion degree of wires seemed to be se-riously, the cracking toughness is lower than before, and the brittleness failure is easy to occur. With the decrease of stress amplitude, the crac-king toughness of steel strand increases, and the failure mode of steel strand will be changed from brittle failure mode to ductile failure mode. Additionally, the steel strands corrosion fatigue predicted model of different corrosion grades are obtained by the three-parameter method, which contributes to the prediction and evaluation of the fatigue life of corrosion cables.
喻宣瑞, 姚国文, 范伟庆. 交变荷载和氯盐环境作用下钢绞线的腐蚀疲劳性能研究[J]. 材料导报, 2021, 35(20): 20087-20091.
YU Xuanrui, YAO Guowen, FAN Weiqing. Experimental on the Corrosion Fatigue Behavior of Steel Strands Under the Couple Effect of Variable Load and Choride Environment. Materials Reports, 2021, 35(20): 20087-20091.
1 Mayrbaurl R M, Camo S. Journal of Bridge Engineering,2001,6(6),645. 2 Faber M H, Engelund S, Rackwitz R, et al. Structural Safety,2003,25(2),201. 3 Nakamura S, Suzumura I, Tarui K. Structural Engineering International,2012,14(1),50. 4 Rebak P B, Perez T. Engineering Structural,2017,14(1),89. 5 Yu X R, Yao G W, Gu L F, et al. Matericals,2020,2,1303. 6 Codaro E N, Nakazato R Z, Horovistiz A L. Materials Science & Engineering A,2008,10(3),189. 7 Mahmoud K M. Theoretical and Applied Fracture Mechanics,2007,48(2),152. 8 Paolo C. Experimental Mechanics,1988,28(4),346. 9 Dolly E, Wei R. Fatigue & Fracture of Engineering Materials & Structures,2000,23(7),555. 10 Yang S C, Yao G W, Zhang J Q. Advances in Mechanical Engineering,2017,9(12),168. 11 ASTIM G85-94. International helping our world work better, West Conshohocken, PA, USA,2011. 12 Xu J, Chen W. Journal of Constructional Steel Research,2013,85,40. 13 Zheng X L, Xie X, Li X Z, et al. Journal of Civil Engineering,2017,3,105.