1. Ph.D. Candidate, College of Civil Engineering, Southeast Univ., Nanjing 210096, China; formerly, Ph.D. Candidate, Dept. of Civil and Resources Engineering, Kyoto Univ., Kyoto 6110011, Japan (corresponding author).
2. Professor, College of Civil Engineering, Southeast Univ., Nanjing 210096, China.
3. Professor, Dept. of Civil Earth Resources Engineering, Kyoto Univ., Kyoto 6110011, Japan.