1. Lecturer, School of Civil Engineering, Beijing Jiaotong Univ., Beijing, China.
2. Chair Professor, Dept. of Civil and Structural Engineering, The Hong Kong Polytechnic Univ., Kowloon, Hong Kong, China.
3. Professor, School of Civil Engineering, Beijing Jiaotong Univ., Beijing, China.
4. Professor, Dept. of Engineering Mechanics, Dalian Univ. of Technology, Dalian, China.
5. Research Associate, Dept. of Civil and Structural Engineering, The Hong Kong Polytechnic Univ., Kowloon, Hong Kong, China.