1. Assistant Professor, Dept. of Civil and Environment Engineering, Saitama Univ., Saitama 338-8570, Japan (corresponding author).
2. Assistant Professor, Dept. of Civil Engineering, Fuzhou Univ., Fuzhou 350108, China; formerly, Doctor Course Student, Dept. of Civil Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0356, Japan.
3. Professor, Disaster Prevention Research Institute, Kyoto Univ., Uji, Kyoto 611-0011, Japan; formerly, Associate Professor, Dept of Civil and Earth Resources Engineering, Kyoto Univ., Kyoto 614-8426, Japan.
4. Emeritus Professor of Aichi Institute of Technology, Director of Aoki Engineering Laboratory, 1102 Sunago, Nagakute, Aichi 480-1112, Japan; formerly, Professor, Dept. of Civil Engineering, Aichi Institute of Technology, Toyota, Aichi 470-0356, Japan.