| Seismic Response of a Three Dimensional Hill Analyzed by the Domain Reduction Method |
 |
| Chiaki YOSHIMURA |
The amplification characteristics of 3-dimensional hills are estimated by considering complex geology such as surface weathered layer and stratified structure under the hill. The 3D analysis results are compared to those by 2D analysis.
Hill topography and layer structure work synergistically in amplifying seismic waves. In case of oblique incidence, strong diffraction waves appear on the opposite slope of the source. The amplification at the top of 3D hill is larger than that of 2D hill. Animation of wave propagation displays the concentration of waves near the hill top and the generation of diffraction waves. |
| keywords: |
3D finite element method, Substructure method, Local geography, Topography, Amplification factor, Strong ground motion |