1. Associate Professor, Dept. of Civil and Structural Engineering, Hong Kong Polytechnic Univ., Hunghom, Hong Kong (corresponding author).
2. Research student, Dept. of Civil and Structural Engineering, Hong Kong Polytechnic Univ., Hunghom, Hong Kong.
3. Professor, School of Civil and Environmental Engineering, Univ. of Science and Technology Beijing, Beijing, People’s Republic of China.
4. Assistant Professor, Dept. of Civil Engineering, Hong Kong Univ., Hong Kong.