1. Ph.D. Candidate, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hong Kong, China.
2. Senior Lecturer, School of Civil, Mining and Environmental Engineering, Faculty of Engineering and Information Sciences, Univ. of Wollongong, NSW 2522, Australia.
3. Chair Professor, Dept. of Civil and Environmental Engineering, Hong Kong Polytechnic Univ., Hong Kong, China (corresponding author).