Abstract
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.
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Acknowledgements
The authors gratefully acknowledge the financial support provided by R&D Program of China Railway Science (2017T001-I), Technology Plan Project of Sichuan Province (18MZGC0186, 18MZGC0247), National Key Research and Development Plan of China (2017YFC0504901), Doctoral Innovation Fund Program of Southwest Jiaotong University (D-CX201703) and the State Scholarship Fund of Studying Abroad (201707000161).
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Cao, L., Yang, C. & Zhang, J. Derailment Behaviors of the Train-Ballasted Track-Subgrade System Subjected to Earthquake Using Shaking Table. KSCE J Civ Eng 24, 2949–2960 (2020). https://doi.org/10.1007/s12205-020-0005-6
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DOI: https://doi.org/10.1007/s12205-020-0005-6