1. Senior Lecturer, School of Civil, Mining and Environmental Engineering, Faculty of Engineering, Univ. of Wollongong, Northfields Ave., Wollongong, NSW 2522, Australia (corresponding author).
2. M.Phil. Candidate, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hong Kong, China.
3. Chair Professor of Structural Engineering, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hong Kong, China.