1. Associate Professor, Dept. of Civil Engineering, The Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.
2. Lecturer, Dept. of Materials Science and Engineering, Southeast Univ., Nanjing, Jiangsu 210096, China.
3. Visiting Scholar, Dept. of Civil Engineering, The Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon, Hong Kong.