1. Ph.D. Candidate, College of Civil Aviation, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 211106, China; Lecturer, Economy and Management School, Nan Jing Tech Univ., Nanjing 210094, P.R. China.
2. Professor, College of Civil Aviation, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 211106, P.R. China.
3. Associate Professor, School of Civil Engineering, Southwest Jiaotong Univ., Chengdu 610031, P.R. China; Research Fellow, Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong Univ., Chengdu 610031, P.R. China.
4. Associate Professor, School of Transportation and Logistic, Southwest Jiaotong Univ., Chengdu 610031, P.R. China.
5. Associate Professor, Dept. of Bridge Engineering, Southwest Jiaotong Univ., Chengdu 610031, P.R. China; Visiting Fellow, Center for Infrastructure Engineering and Safety, School of Civil and Environmental Engineering, Univ. of New South Wales, UNSW Sydney, NSW 2052, Australia; Research Fellow, Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong Univ., Chengdu 610031, P.R. China (corresponding author).