1. School of Civil Engineering, Southwest Jiaotong University, 111 1st North Section, 2nd Ring Rd., Chengdu 610031, China, https://orcid.org/0000-0003-1368-3296 (H.L.)
2. Ministry of Education Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, 111 1st North Section, 2nd Ring Rd., Chengdu 610031, China
3. School of Civil Engineering, Southwest Jiaotong University, 111 1st North Section, 2nd Ring Rd., Chengdu 610031, China (Corresponding author), e-mail: w@swjtu.edu.cn, https://orcid.org/0000-0003-4079-0687
4. Ministry of Education Key Laboratory of Impact and Safety Engineering, Ningbo University, 818 Fenghua Rd., Ningbo 315211, China