1. State Key Laboratory of Traction Power, Southwest Jiaotong Univ., Chengdu 610031, China.
2. Professor, State Key Laboratory of Traction Power, Southwest Jiaotong Univ., Chengdu 610031, China.
3. China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, P.R. China.
4. Ph.D. Candidate, Faculty of Civil Engineering and Geosciences, Delft Univ. of Technology, Delft 2628CN, Netherlands. (corresponding author). ORCID: .
5. School of Civil and Transportation Engineering, Guangdong Univ. of Technology, Guangzhou, Guangdong 510006, P.R. China.