1. Project Associate Professor, Graduate School of Frontier Sciences, Univ. of Tokyo, 5-1-5 Kashiwanoha, Chiba, 277-8563, Japan (corresponding author).
2. Senior Lecturer in Civil Engineering, School of Architecture, Dept. of Computing and Engineering, Univ. of East London, Docklands Campus, 4-6 University Way, London E16 2RD, U.K.
3. Assistant Professor, Dept. of Civil and Environmental Engineering, Waseda Univ., 3-4-1 Ookubo, Tokyo 169-8555, Japan.
4. Engineer, Nihon Unisys. Ltd., 1-1-1 Toyosu, Koto-ku, Tokyo 135-8560, Japan.
5. Professor, Dept. of Civil and Environmental Engineering, Waseda Univ., 3-4-1 Ookubo, Tokyo 169-8555, Japan.
6. Assistant Professor, Dept. of Civil Engineering, Ho Chi Minh City Univ. of Technology, 268 Ly Thuong Kiet St., Dist. 10, Ho Chi Minh, Vietnam.
7. Engineer, Chubu Electric Power Company, 1 Higashi-shincho, Higashi-ku, Nagoya, Aichi 461-8680, Japan.
8. Engineer, Ministry of Land, Infrastructure, Transport and Tourism, 2-1-3 Kasumigaseki, Chiyoda, Tokyo 100-0013, Japan.
9. Master's Student, Dept. of Civil and Environmental Engineering, Waseda Univ., 3-4-1 Ookubo, Tokyo 169-8555, Japan.