掲載雑誌（和）： 日本地震工学シンポジウム講演集 Vol： 6巻 年： 1982年 頁： 177-184頁 著者（和）： - タイトル（和）： - 抄録（和）：
- キーワード（和）： - 掲載雑誌（英）： PROCEEDINGS OF JAPAN EARTHQUAKE ENGINEERING SYMPOSIUM 著者（英）： Junichi SHIBUYA, Toshio SHIGA タイトル（英）： A GROUND STRUCTURE MODEL IN SENDAI OBTAINED FROM UNDERGROUND OBSERVATIONS OF EARTHQUAKE MOTIONS 抄録（英）：
This paper presents a deep ground structure model in Sendai and its amplification characteristics of earthquake motions through analyses of recordings of underground motions of minor earthquakes and SMAC accelerograms of a strong earthquake. A structural model of the surface ground to the depth of 230m is obtained from an analysis of observed underground motions at the depths of 17m and 230m in Sendai. Amplification characteristics of the model agree well with amplification spectra of the observed underground motions. A deep ground structure model which contains also the ground deeper than 230m as well as the surface ground is obtained from an analysis of strong ground motion recordings in Sendai and Tarumizu-Dam, which is on a hard rock ground in the vicinity of Sendai. It is found that a 400m model to the depth of basement layer interprets well the general spectral characteristics of the observed strong ground motions in Sendai. Amplification characteristics of a deep ground structure model to incident SH and SV waves with an inclined angle of incidence are discussed. Input motions in a basement layer in Sendai are predicted utilizing the proposed ground structure model and the observed strong ground motions in Sendai. A type of waves, SH and SV, and an angle of incidence are taken into account in the analysis. Calculated input motions agree well with the observed motions in Tarumizu-Dam. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集