1. Lecturer, Research Institute of Structural Engineering and Disaster Reduction, Tongji Univ., Shanghai 200092, China. E-mail: thstj@mail.tongji.edu.cn
2. Associate Professor, Dept. of Architecture, School of Science and Engineering, Kinki Univ., Kowakae 3-4-1, Higashi Osaka City 577-0056, Japan.
3. Professor, Disaster Prevention Research Institute, Kyoto Univ, Uji, Kyoto 611-0011, Japan.