1. Beijing Key Laboratory of Track Engineering, Beijing Jiaotong University, No. 3 Shangyuancun, Haidian District, Beijing 100044, P.R. China; and Beijing Engineering and Technology Research Center of Rail Transit Line Safety and Disaster Prevention, Beijing Jiaotong University, Beijing 100044, P.R. China (Corresponding author), e-mail: ypshen@bjtu.edu.cn, https://orcid.org/0000-0002-9753-9269
2. Department of Railway and Highway Engineering, School of Civil Engineering, Beijing Jiaotong University, No. 3 Shangyuancun, Haidian District, Beijing 100044, P.R. China
3. Key Laboratory for Bridge and Tunnel of Shanxi Province, Chang’an University, Middle Section, South of the Second Ring, Xi’an 710064, P.R. China