| METALS AND METAL MATRIX COMPOSITES |
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| Experimental on the Corrosion Fatigue Behavior of Steel Strands Under the Couple Effect of Variable Load and Choride Environment |
| YU Xuanrui, YAO Guowen, FAN Weiqing
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| School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China |
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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.
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Published: 12 November 2021
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| Fund:Natural Key R & D Program of China(2017YFC0806001). |
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Corresponding Authors:
990020050526@cqjtu.edu.cn
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About author:: Xuanrui Yu, male, Ph.D., School of Civil Enginee-ring, Chongqing Jiaotong University, mainly engaged in bridge health testing, bridge durability research. Parti-cipated in Wanzhou No. 2 Bridge, Hejiang Bridge and other monitoring projects, published more than ten papers.
Guowen Yao, doctor, professor and doctoral supervisor, vice president of School of Civil Engineering, Chongqing Jiaotong University, deputy director of State Key Laboratory of Mountain Bridge and Tunnel Engineering, Young Scientific and Technological Talents of the Ministry of transport. He is mainly engaged in teac-hing and scientific research on intelligent construction and intelligent operation and maintenance of bridges,
long-term performance and detection and reinforcement of bridges, environmental mechanics test technology of engineering structures, presided over the research of more than 20 national, provincial and ministerial projects such as major scientific research instrument development projects and general projects of the National Natural Science Foundation of China, and completed the detection, reinforcement, design and Monitoring and other technical services, won 2 first prizes for scientific and technological progress of the Ministry of education and Chongqing, and published more than 120 academic papers. |
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2021, Vol. 35 
