1. Seismic Design Method for Pile Foundation
Jiro FUKUI
Public works Research Institute, Japan

2. 2 Level Seismic Load → Seismic Coefficient Method
Ground motion highly probable to occur during service period of bridge (Level ⅠSeismic Load)
→　Seismic Coefficient Method
Ground motion with high intensity , though less probable to occur during service period of bridge (Level Ⅱ Seismic Load)
→　Ductility Design Method

3. Analytical Model of Pile Foundation

4. Analytical Model of Pile Foundation
Seismic Coefficient Method

5. Analytical Model of Pile Foundation
Ductility Design Method

7. Effects of Group Piles

8. Effects of Group Piles