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Derailment Behaviors of the Train-Ballasted Track-Subgrade System Subjected to Earthquake Using Shaking Table
KSCE Journal of Civil Engineering ( IF 2.2 ) Pub Date : 2020-08-05 , DOI: 10.1007/s12205-020-0005-6
Licong Cao , Changwei Yang , Jianjing Zhang

Ballasted track is the most common track model in railway system and earthquake would be a great threaten for train running safety. This study investigates derailment features and lateral displacement response of the train-ballasted track-subgrade system subjected to earthquake using 1-g shaking table. The model was loaded using scaled Zhengzhou Huanghe Qiaozhi (ZHQ) earthquake wave, ALS earthquake and CHY004 earthquake which are with variable-characters. It is observed that current stopping threshold for train is conservative because derailment factor is less than 0.8. The derailment factor of train increase with increasing acceleration amplitude and the critical derailment condition of train under ZHQ earthquake, ALS earthquake and CHY004 earthquake is 0.18 g, 0.15 g and 0.15 g, respectively. The lateral displacement of rail is negligible compared with that of wheel. Lower-frequency earthquake would cause larger derailment factor with derailment analysis and displacement analysis. The maximum peak lateral displacement of wheel under critical derailment condition is significant, which means train safety is under a great danger.



中文翻译:

振动台作用下的铁路道Track轨道路基系统脱轨行为

压载轨道是铁路系统中最常见的轨道模型,地震将严重威胁列车的运行安全。这项研究使用1-g振动台研究了地震作用下的铁路道ball轨道路基系统的脱轨特征和横向位移响应。该模型使用具有可变特征的成比例的郑州黄河桥直地震波,ALS地震和CHY004地震加载。可以看出,当前的列车停止阈值是保守的,因为出轨系数小于0.8。在ZHQ地震,ALS地震和CHY004地震下,列车的出轨因子随加速度幅值的增加而增加,列车的临界出轨条件分别为0.18 g,0.15 g和0.15 g。轨道的横向位移与车轮相比可以忽略不计。低频地震通过脱轨分析和位移分析会导致较大的脱轨因子。在严重脱轨情况下,车轮的最大峰值横向位移非常大,这意味着列车安全处于极大的危险之中。

更新日期:2020-08-04
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