Real-Time Quantitative Evaluation on the Longitudinal Slip Performance of Spherical Steel Bearings of Long-Span Bridges

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-03-15 DOI:10.1155/2024/6461381

Shiyang Xu, Xin Zhou, Gaoxin Wang, Youliang Ding

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Abstract

Spherical steel bearings play an important role in the normal longitudinal expansion of the main girders of long-span bridges. With the increase in service time, the wear damage will deteriorate the longitudinal slip performance of spherical steel bearings. In this research, a method of real-time quantitative evaluation on longitudinal slip performance is proposed through monitoring data analysis, correlation analysis, damage evaluation analysis, and experiment data analysis. Monitoring data analysis shows that the temperature field has a good linear relationship with longitudinal displacement. Correlation analysis shows that this relationship is well described by a time-varying multiple linear regression model. Furthermore, bearing friction is used as an index for real-time quantitative evaluation, and a large value of bearing friction indicates serious damage. An evaluation model considering the influence of temperature field and bearing frictions is proposed. The time-varying values of bearing frictions are calculated through Kalman filtering analysis. Experimental results show that the maximum evaluation error of this method is less than 5%, verifying that the proposed method is feasible for real-time quantitative evaluation on the longitudinal slip performance of bridge bearings.

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大跨度桥梁球形钢支座纵向滑移性能的实时定量评估

球型钢支座在大跨度桥梁主梁的正常纵向伸缩中起着重要作用。随着使用时间的增加，磨损破坏会使球面钢支座的纵向滑移性能恶化。本研究通过监测数据分析、相关性分析、损伤评估分析和实验数据分析，提出了一种对纵向滑移性能进行实时定量评估的方法。监测数据分析表明，温度场与纵向位移具有良好的线性关系。相关性分析表明，时变多元线性回归模型可以很好地描述这种关系。此外，轴承摩擦力被用作实时定量评估的指标，轴承摩擦力值越大表明损坏越严重。提出了一个考虑温度场和轴承摩擦影响的评估模型。通过卡尔曼滤波分析计算轴承摩擦的时变值。实验结果表明，该方法的最大评估误差小于 5%，验证了所提方法可用于桥梁支座纵向滑移性能的实时定量评估。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.