1. MOE Key Laboratory of High-Speed Railway Engineering, Southwest Jiaotong University, Chengdu, People's Republic of China
2. SWJTU-Leeds Joint School, Southwest Jiaotong University, Chengdu, People's Republic of China
3. School of Civil Engineering, Southwest Jiaotong University, Chengdu, People's Republic of China
4. Infrastructure Inspection Research Institute, China Academy of Railway Sciences, Beijing, People's Republic of China