© 2020 IIETA. This article is published by IIETA and is licensed under the CC BY 4.0 license (http://creativecommons.org/licenses/by/4.0/).
OPEN ACCESS
The vehicle running safety on structures during an earthquake is drawing great attention due to the increased frequency of large-scale earthquakes in recent years in Japan. In order to enhance the vehicle running safety on structures during an earthquake, it is important to reinforce existing structures in an effective and efficient way. On this point, it is needed to identify potential weak structures for the running safety in continuous railway structures, understand the dominant factor that contributes to causing derailment, and provide an appropriate reinforcement to the existing structures. In this study, we investigated the influence of various parameters related to the vehicle running safety on structures during an earthquake with simple dynamic structural models using the analysis program DIASTARS III that can consider the dynamic interaction between railway vehicles and railway structures. We also conducted seismic vehicle running analysis on a model line with 4.8 km in length and identified the weak structures for the running safety. Additionally, we proposed an index that is calculated only from structural responses with an earthquake and evaluates the ease of derailment. It was observed that the index could identify the critical structures on the running safety and evaluate the dominant factor.
derailment, dynamic interaction, earthquake, numerical analysis, vehicle running safety
[1] Sogabe, M., Harada, K. & Watanabe, T., Vehicle running quality during earthquake on railway viaducts. Proceedings of the International Symposium on Speed-up, Safety and Service Technology for Railway and Maglev Systems (STECH’09), CD-ROM No.360713, 2009.
[2] Sogabe, M. Goto, K., Tokunaga, M. & Asanuma K., Risk assessment method for trainrunning safety during seismicity on railway line. Proceeding of the Ninth World Congress on Railway Research (WCRR), USB H18P, 2011.
[3] Railway Technical Research Institute, Design Standards for Railway Structures and Commentary (Displacement limits), Maruzen: Tokyo, 2008 (in Japanese).
[4] Wakui, H., Matsumoto, N., Matsuura, A. & Tanabe, M., Dynamic interaction analysis for railway vehicles and structures. Japan Society of Civil Engineers, 513(I-31), pp. 129–138, 1995. (in Japanese)
[5] Matsumoto, N., Sogabe, M., Wakui, H. & Tanabe, M., Running safety analysis of vehicles on structures subjected to earthquake motion. Quarterly Report of RTRI, 45(3), pp. 116–122, 2004.
[6] Goto, K., Sogabe, M., Tanabe, M. & Watanabe, T., Study on contact model between wheel and track structure after derailment. Proceedings of the International Symposium on Speed-up, Safety and Sustainable Technology for Railway and Maglev Systems (STECH 2015), USB, 2015.
[7] Goto, K., Sogabe M., Tanabe, M., Watanabe, T. & Tokunaga, M., Simple method for analyzing contact between wheelset members and track structures using MBD. Quarterly Report of RTRI, 59(1), pp. 57–64, 2018.
[8] Miyamoto, T., Matsumoto N., Sogabe, M., Shimomura, T., Nishiyama, Y. & Matsuo, M, Railway vehicle dynamic behavior against large-amplitude track vibration – a full-scale experiment and numerical simulation. Quarterly Report of RTRI, 45(3), pp. 111–115, 2004.
[9] Railway Technical Research Institute, Design Standards for Railway Structures and Commentary (Seismic Design), Maruzen: Tokyo, 1999 (in Japanese).