Structural Dynamics

In an event of an earthquake, source, path, and site characteristics as well as soil-foundation-structure interaction strongly affects the seismic action to structures. The members of our lab pursue studies to understand the characteristics and the influence of these aspects as well as to improve seismic safety of structures based on observation. Main research topics of this research section is as follows.

1) Seismic risk evaluation based on strong motion estimation considering heterogeneous source process and subsurface velocity structure
2) System development for improving precision of subsurface velocity structures
3) Methodology for identifying the subsurface structure based on microtremor measurements
4) Studies on Soil-Foundation-Structure interaction
 

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The directional dependency of Horizontal-to-Vertical spectral ratio of microtremors (MHVR) (above) and the assumed location of the heterogeneous subsurface structure inferred from the MHVRs (below)

The directional dependency of Horizontal-to-Vertical spectral ratio of microtremors (MHVR) (above) and the assumed location of the heterogeneous subsurface structure inferred from the MHVRs (below)


 

One scene from microtremor observation in the field

One scene from microtremor observation in the field

 

Faculty Members

  • ProfessorShinichi Matsushima 

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