Fatigue Safety Assessment of Concrete Continuous Rigid Frame Bridge Based on Rain Flow Counting Method and Health Monitoring Data

Authors

  • Ying hua Li Shixing County Administrative Service Center
  • Junyong He

    Guangdong College of Industry and Commerce, Guangzhou, Guangdong, 510510, China

  • Xiaoqing Zeng

    Shixing County Statistics Bureau, Shixing, Shaoguan, Guangdong, 512500, China

  • Yanxing Tang

    Shixing County Hospital of Traditional Chinese Medicine, Shixing, Shaoguan, Guangdong, 512500, China

DOI:

https://doi.org/10.30564/jaeser.v6i3.5890

Abstract

The fatigue of concrete structures will gradually appear after being subjected to alternating loads for a long time, and the accidents caused by fatigue failure of bridge structures also appear from time to time. Aiming at the problem of degradation of long-span continuous rigid frame bridges due to fatigue and environmental effects, this paper suggests a method to analyze the fatigue degradation mechanism of this type of bridge, which combines long-term in-site monitoring data collected by the health monitoring system (HMS) and fatigue theory. In the paper, the authors mainly carry out the research work in the following aspects: First of all, a long-span continuous rigid frame bridge installed with HMS is used as an example, and a large amount of health monitoring data have been acquired, which can provide efficient information for fatigue in terms of equivalent stress range and cumulative number of stress cycles; next, for calculating the cumulative fatigue damage of the bridge structure, fatigue stress spectrum got by rain flow counting method, S-N curves and damage criteria are used for fatigue damage analysis. Moreover, it was considered a linear accumulation damage through the Palmgren-Miner rule for the counting of stress cycles. The health monitoring data are adopted to obtain fatigue stress data and the rain flow counting method is used to count the amplitude varying fatigue stress. The proposed fatigue reliability approach in the paper can estimate the fatigue damage degree and its evolution law of bridge structures well, and also can help bridge engineers do the assessment of future service duration.

Keywords:

Long-span continuous rigid frame bridge, Rain flow counting method, Fatigue performance, Health monitoring system, Strain monitoring data

References

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How to Cite

Li, Y. hua, He, J., Zeng, X., & Tang, Y. (2023). Fatigue Safety Assessment of Concrete Continuous Rigid Frame Bridge Based on Rain Flow Counting Method and Health Monitoring Data. Journal of Architectural Environment & Structural Engineering Research, 6(3), 31–40. https://doi.org/10.30564/jaeser.v6i3.5890

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