1. Professor, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Kowloon, Hong Kong (corresponding author).
2. Ph.D. Candidate, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Kowloon, Hong Kong.
3. Engineer, Dept. of Architecture and Civil Engineering, City Univ. of Hong Kong, Kowloon, Hong Kong.