1. Ph.D. Student, Dept. of Civil and Environmental Engineering, National Univ. of Singapore, 1 Engineering Dr. 2, Singapore 117576.
2. Professor, Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing Univ. of Technology, No. 100 Pingleyuan, Beijing 100124, China; Guest Professor, National Engineering Laboratory for High Speed Railway Construction, Central South Univ., 22 Shaoshannan Rd., Changsha 410075, China (corresponding author).
3. Professor, School of Engineering, Royal Melbourne Institute of Technology Univ., Melbourne, VIC 3001, Australia.
4. Professor, Dept. of Architecture, Kanagawa Univ., 3-27-1 Rokkakubashi, Kanagawa-ku, Yokohama 221-8686, Japan.