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On-line Access: 2022-06-24
Received: 2021-07-02
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Jing HU, Xue-cheng BIAN. Analysis of dynamic stresses in ballasted railway track due to train passages at high speeds[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2100305 @article{title="Analysis of dynamic stresses in ballasted railway track due to train passages at high speeds", %0 Journal Article TY - JOUR
高速列车荷载作用下的有砟轨道动应力分析机构:1福州大学,土木工程学院,中国福州,350108;2浙江大学,建筑工程学院,中国杭州,310058;3浙江大学,软弱土与环境土工教育部重点实验室,中国杭州,310058 目的:研究高速列车荷载作用下有砟轨道路基和地基内部的动应力特征。 创新点:1.推导有砟轨道的2.5维有限元求解方程。2.从应力的角度出发,确定已有分析模型适用的列车速度范围。3.揭示轨道不平顺对路基和地基内部应力大小和应力路径的重要作用。 方法:1.基于2.5维有限元理论推导出有砟轨道的动力控制方程(公式(20))。2.利用秦沈客运专线的现场测试结果验证模型的准确性(图5)。3.基于验证后的模型,分析列车速度、扣件性能及轨道不平顺对动应力的影响。 结论:1.Boussinesq解无法考虑列车速度和实际路基结构对应力的影响。2.平顺轨道模型只适用于列车速度不超过100km/h的情况。3.轨道不平顺不仅会增大动应力的强度还会引起多次主应力旋转,使得土体更加容易被破坏。 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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