1. School of Mechatronics and Vehicle Engineering, Chongqing Jiaotong University, Chongqing, PR China
2. State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing, PR China
3. School of Physical Science and Technology, Southwest Jiaotong University, Chengdu, PR China
4. Department of Materials Science and Engineering, University of Toronto, Toronto, Canada
5. Key Laboratory of Roads and Railway Engineering Safety Control (Ministry of Education), Shijiazhuang Tiedao University, Shijiazhuang, China