1. Professor, Dept. of Civil Engineering, The Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. E-mail: zongjin@ust.hk
2. Visiting Scholar, Dept. of Civil Engineering, The Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China. E-mail: garrison@ust.hk