1. Ph.D. Candidate, Dept. of Civil and Structural Engineering, Hong Kong Polytechnic Univ., Hong Kong, China.
2. Chair Professor, Structural Engineering, Dept. of Civil and Structural Engineering, Hong Kong Polytechnic Univ., Hong Kong, China (corresponding author).
3. Reader, Institute for Infrastructure and Environment, Joint Research Institute for Civil and Environmental Engineering, School of Engineering, Univ. of Edinburgh, Edinburgh, UK.