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The intercity high-speed railway is developing towards an operating mode of ultra high speed, large capacity, and high frequency, and the frequency of driving loads borne by structures has also significantly increased, which is bound to accelerate the accumulation and development process of fatigue damage on elevated bridge vehicles. Therefore, this article takes the 32 m prestressed concrete box girder of Tianjin High Speed Railway as the research object, and uses similarity theory to design and manufacture three model test beams. To study the fatigue stiffness degradation of prestressed concrete box beams.

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Research on Fatigue Rigidity Degradation of Prestressed Concrete Box Girders

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  • 出版模式：

    开放获取

  • 发表日期：

    2025年

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  • Hongyu Zhou,
  • Haoda Wang,
  • Quanzhou Ma,
  • Shuai Han

摘要

The intercity high-speed railway is developing towards an operating mode of ultra high speed, large capacity, and high frequency, and the frequency of driving loads borne by structures has also significantly increased, which is bound to accelerate the accumulation and development process of fatigue damage on elevated bridge vehicles. Therefore, this article takes the 32 m prestressed concrete box girder of Tianjin High Speed Railway as the research object, and uses similarity theory to design and manufacture three model test beams. To study the fatigue stiffness degradation of prestressed concrete box beams.