1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Kowloon, Hong Kong, 999077 China.
2. Chair Professor, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Kowloon, Hong Kong, 999077 China (corresponding author).
3. Postdoctoral Fellow, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Kowloon, Hong Kong, 999077 China.
4. Professor, School of Civil Engineering and Architecture, Zhejiang Univ., Zheda Rd. 38#, Hangzhou 310027, China.