1. Assistant Professor, Dept. of Civil Engineering, Hong Kong Univ. of Science and Technology, HKSAR, China (corresponding author). E-mail: ceyhwang@ust.hk
2. Research Student, Dept. of Civil Engineering, Hong Kong Univ. of Science and Technology, HKSAR, China.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Univ. of Macau, Macau SAR, China.