1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong 999077, China.
2. Professor, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong 999077, China (corresponding author).
3. Ph.D. Postdoctoral Fellow, Dept. of Civil and Environmental Engineering, The Hong Kong Polytechnic Univ., Hong Kong 999077, China.