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| | Abstract | | The objective of this study is to investigate the effect of 3-D configuration of the ground from the viewpoint of elastic wave propagation. In the study, analysis model is 2-D slope ground with a small canyon that penetrates perpendicularly into the upper part of the ground subject to incident surface waves (Rayleigh and Love) and S-wave. The analysis method is a combination of 3-D finite element and 2.5-D thin layered and finite element methods in conjunction with substructure technique. It was found from the result that the wave field becomes very complex when there is a small canyon that penetrates into the upland through the slope. It has also revealed that the frequency characteristics such as H/V spectra, estimated phase velocities and amplification factors are significantly influenced by the irregularity. |
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