1. School of Civil Engineering, Central South University, Changsha, Hunan, China
2. National Engineering Research Center of High-speed Railway Construction Technology, Changsha, Hunan, China
3. Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA
4. Department of Civil Engineering, University of British Columbia, Vancouver, British Columbia, Canada
5. School of Civil Engineering, Beijing Jiaotong University, Beijing, China
6. China Railway Siyuan Survey and Design Group Co. Ltd, Wuhan, Hubei, China