1. Associate Professor, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Tat Chee Ave., Kowloon, Hong Kong (corresponding author).
2. Research Associate, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Tat Chee Ave., Kowloon, Hong Kong.
3. Ph.D. Student, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Tat Chee Ave., Kowloon, Hong Kong.
4. Distinguished Professor, Dept. of Civil and Environmental Engineering, National Univ. of Singapore, Singapore 119077.