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Hazard and Risk Evaluation Research Division
Earthquake Engineering
Susumu Ohno (Assoc. Prof.)
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Research summary


The followings are our main research topics for the purpose of earthquake disaster mitigation.

GeolStrong Motion Observation and Development of Rapid Shake-Map Estimation Method

In order to grasp vibration damage after an earthquake, it is very important to estimate areal distribution of ground motion strength rapidly. However, strong motion stations are too sparsely distributed for this purpose. Also, the seismic intensity scale without period information cannot predict various kinds of vibration damages appropriately.
To overcome these difficulties, 1) we have installed and operated the strong-motion network in Sendai, and based on this network, 2) we are developing the period-dependent precise shake map estimation method by correcting the effects of both shallow and deep subsurface structures.


Modeling of Strong-Motion Characteristics and Development of Ground Motion Prediction Method

In order to predict earthquake input motion precisely for seismic design of various structures such as buildings, plants, bridges, and dams, it is commonly important to model the characteristics of site-amplification on the building site, attenuation along the propagation path of seismic waves, and radiated spectra by seismic sources. We have estimated these characteristics from observation records and revealed their regional variations. Based on these results, we are developing precise strong-motion prediction method by taking into account the above regional variations.