1. Ph.D. Research Assistant, Dept. of Civil and Environmental Engineering, Hong Kong Univ. of Science and Technology, Clear Water Bay, Hong Kong.
2. Professor, Dept. of Civil and Environmental Engineering, Hong Kong Univ. of Science and Technology, Clear Water Bay, Hong Kong (corresponding author).
3. Research Engineer, AECOM Asia Company Ltd., 138 Shatin Rural Committee Rd., Hong Kong.