2023 Volume 79 Issue 13 Article ID: 22-13001
Based on the results of numerous geotechnical investigations, we have developed standard geotechnical information database that can efficiently and adequately represent the characteristics of surface earthquake motion. Specifically, using the results of many geotechnical surveys, we classify the ground by clustering using the natural period Tg and the strength of ground Kf’ as indices, and extract ground information representative of these classifications. As a result, it was confirmed that the surface earthquake motions calculated using the ground information for the 50 sites selected in this study were in good agreement with the probability distribution of those motions calculated using all ground information in Japan. Furthermore, it was shown that the surface earthquake motion can be efficiently and adequately evaluated without constructing a new analysis model by effectively using the nationwide data of seismic response analysis of ground constructed in this study.
