论文部分内容阅读
发展重载列车增加运输密度是提高铁路运输能力的有效措施,但是,列车的轴重、长度和运营密度增加以后,对现有铁路桥梁的运营强度影响是需要研究的一个问题。本文介绍了浙赣线浦阳桥上所测得的应力历程曲线分析结果,并拟定了一个假想的重载列车模式,用这个重载列车模式通过不同跨度的桥梁计算其引起的疲劳累积损伤,用以来探讨发展重载列车对现有桥梁结构的影响。并对各种跨度桥梁的疲劳控制部位的疲劳寿命进行了估算,得到了一些有参考价值的结论。最后针对发展重载列车,桥梁结构的局部构件应采取的措施提出了若干建议。
However, increasing the axle load, length and operating density of trains will have an impact on the operating strength of the existing railway bridges. Therefore, it is an issue to be studied that increasing the density of heavy haul trains is an effective measure to improve the capacity of railway transportation. This paper introduces the stress history curve analysis results measured on the Puyang Bridge of Zhejiang-Jiangxi Line and draws up a hypothetical heavy-haul train model. With this heavy-haul train model, the accumulated fatigue damage caused by the bridges with different span is calculated, To explore the impact of developing heavy-haul trains on existing bridge structures. The fatigue life of the fatigue control parts of bridges with various span is estimated, and some conclusions of reference value are obtained. Finally, some suggestions are put forward for the measures to be taken to develop partial components of heavy-haul trains and bridge structures.