• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2023, Vol. 59 ›› Issue (21): 341-355.doi: 10.3901/JME.2023.21.341

• 摩擦学 • 上一篇    下一篇

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悬索桥主缆钢丝与鞍座材料摩擦腐蚀疲劳行为

王博1, 王大刚1, 种海浪1, 沈小满1, 张德坤2   

  1. 1. 中国矿业大学机电工程学院 徐州 221116;
    2. 中国矿业大学材料与物理学院 徐州 221116
  • 收稿日期:2023-02-21 修回日期:2023-07-16 出版日期:2023-11-05 发布日期:2024-01-15
  • 通讯作者: 王大刚(通信作者),男,1984年出生,博士,教授,博士研究生导师。主要研究方向为摩擦疲劳与摩擦传动。E-mail:wangdg@cumt.edu.cn
  • 作者简介:王博,男,1992年出生,博士研究生。主要研究方向为钢丝绳摩擦腐蚀。E-mail:Wangb1213@cumt.edu.cn
  • 基金资助:
    国家自然科学基金(51875565)、中国博士后科学基金(2019M652001,2020T130695)和江苏高校优势学科建设工程(PAPD)资助项目。

Tribo-corrosion-fatigue Behaviors of Suspension Bridge Cable Wires in Contact with the Saddle Material

WANG Bo1, WANG Dagang1, CHONG Hailang1, SHEN Xiaoman1, ZHANG Dekun2   

  1. 1. School of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou 221116;
    2. School of Materials and Physics, China University of Mining and Technology, Xuzhou 221116
  • Received:2023-02-21 Revised:2023-07-16 Online:2023-11-05 Published:2024-01-15

摘要: 大跨度多塔悬索桥主鞍座两侧主缆钢丝与鞍座材料间受恒载、车载、风荷载以及腐蚀环境耦合作用产生摩擦腐蚀疲劳行为,导致钢丝承载强度渐变劣化,严重影响主缆承载安全性。因此,研究主缆钢丝与鞍座材料摩擦腐蚀疲劳行为至关重要。搭建钢丝摩擦腐蚀疲劳试验台开展钢丝与鞍座材料摩擦腐蚀疲劳实验,运用超景深电子显微镜、扫描电子显微镜考察主缆钢丝磨损轮廓、磨损机理、磨损系数和横截面失效面积特性;通过万能试验机并结合损伤力学理论和有限元法,建立疲劳钢丝损伤度演化模型和钢丝承载强度劣化模型。结果表明:钢丝摩擦因数呈迅速增加-减小-增加-稳定趋势,随接触载荷增大而减小,随疲劳载荷增大而增大;磨损轮廓随疲劳次数近似线性增加,失效面积随疲劳次数近似抛物线增加,二者随接触载荷和疲劳载荷的增大均增加;磨损系数在磨损稳定期减小,随疲劳次数增加小幅度增长;磨损机理以黏着磨损、磨粒磨损、疲劳磨损和腐蚀磨损为主;钢丝损伤度与疲劳次数呈二次函数关系;接触载荷和疲劳载荷的增加,导致钢丝损伤度增大、承载强度降低。结果对悬索桥主缆损伤及承载安全性能评估具有理论指导意义。

关键词: 主缆钢丝, 摩擦腐蚀疲劳, 承载强度, 渐变劣化

Abstract: The coupling effect of dead load, vehicle load, wind load and corrosive environment causes the tribo-corrosion-fatigue behaviors between the main cable wires and the saddle material on both sides of main saddle of long-span multi-tower suspension bridge. The tribo-corrosion-fatigue behaviors lead to the gradual deterioration of the load-bearing strength of the wire, which seriously affects the load-bearing safety of the main cable. Therefore, it is very important to study the tribo-corrosion-fatigue behavior between main cable wire and saddle material. The wear profile, wear mechanism, wear coefficient and cross-sectional failure area characteristics of the main cable wire are investigated by ultra-depth electron microscope and scanning electron microscope. The evolution model of wire damage degree and the deterioration model of wire bearing strength are established through the universal testing machine combined with the theory of damage mechanics and finite element method. The results show that the friction coefficient presents a rapid increase - decrease - increase - stabilization trend, decreases with the increasing contact load and increases with the increasing fatigue load. The wire wear profile increases approximately linearly with the fatigue cycles, the failure area increases approximately parabolically with the fatigue cycles, both of them increase with the increase of the contact load and the fatigue load. The wear coefficient decreases in the stable wear period and increases slightly with the increasing fatigue cycles. The wear mechanisms are mainly adhesive wear, abrasive wear, fatigue wear and corrosion wear. There is a good quadratic function relationship between the wire damage degree and the fatigue cycles. The increasing contact load and fatigue load increase the wire damage and decrease the load-bearing strength. The results have theoretical significance for the evaluation of main cable damage and load-bearing safety performance of suspension bridge.

Key words: main cable wire, tribo-corrosion-fatigue, load-bearing strength, gradual deterioration

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