掲載雑誌（和）： 日本地震工学シンポジウム講演集 Vol： 7巻 年： 1986年 頁： 541-546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）： Tadanobu SATO, Junji KIYONO, Toshikazu MATUOKA タイトル（英）： ATTENUATION OF PEAK GROUND MOTION TAKING INTO ACCOUNT THE FAULT EXTENT 抄録（英）：
We here report a simplified analytical procedure with which to estimate the attenuation of peak ground motions taking into account the fault extent. The attenuation laws for peak ground motion proposed so far are functions of the magnitude, the epicentral distance and the soil condition of the site. Estimated peak acceleration using these attenuation laws becomes unrealistic in the region near the source because the epicentral distance is not a proper parameter with which to express the distance between the source region and the site. The expectation of peak acceleration is derived in terms of three moments of the power spectrum calculated by superposing the source spectra of small events. The expectation, therefore, includes effects of the rupture process of the fault and the duration of the earthquake motion. Results show that the peak acceleration is strongly affected by the rupture process of the fault and the spatial collocation between the fault position and the observation site. The attenuation of peak acceleration has an upper bound near the source region if the corresponding distance between the site and the source region becomes less than the fault length. キーワード（英）： - 記事区分： - 区分 　　　委員会論文集