1. Assistant Professor, Dept. of Building and Construction, City Univ. of Hong Kong, Tat Chee Ave., Kowloon, Hong Kong (corresponding author).
2. Associate Professor, Dept. of Building and Construction, City Univ. of Hong Kong, Tat Chee Ave., Kowloon, Hong Kong.
3. Professor Emeritus, School of Civil and Environmental Engineering, Cornell Univ., Hollister Hall, Ithaca, NY 14853-3501.