1. Professor, Dept. of Civil Engineering, Beihang Univ., Beijing, China (corresponding author).
2. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Hong Kong Univ. of Science and Technology, Hong Kong Special Administrative Region, China.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Hong Kong Univ. of Science and Technology, Hong Kong Special Administrative Region, China.
4. Ph.D. Candidate, Dept. of Civil Engineering, Beihang Univ., Beijing, China.