WEKO3
アイテム
Finite-Difference Simulation of Long-Period Ground Motion for the Nankai Trough Megathrust Earthquakes
https://nied-repo.bosai.go.jp/records/5422
https://nied-repo.bosai.go.jp/records/542298172bbc-c489-4205-acb9-c0b725e12af7
| Item type | researchmap(1) | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-30 | |||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||
| 言語 | ja | |||||||||||||||||||||||||
| タイトル | Finite-Difference Simulation of Long-Period Ground Motion for the Nankai Trough Megathrust Earthquakes | |||||||||||||||||||||||||
| タイトル | ||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| タイトル | Finite-Difference Simulation of Long-Period Ground Motion for the Nankai Trough Megathrust Earthquakes | |||||||||||||||||||||||||
| 著者 |
Takahiro Maeda
× Takahiro Maeda
× Nobuyuki Morikawa
× Asako Iwaki
× Shin Aoi
× Hiroyuki Fujiwara
|
|||||||||||||||||||||||||
| 抄録 | ||||||||||||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||||||||||||
| 内容記述 | We evaluated long-period ground motions for the anticipated Nankai Trough megathrust earthquake in southwest Japan. To understand a variation of longperiod ground motions caused by the uncertainty of the source model, we performed a finite difference simulation using 104 source models, assuming various possible source parameters, including rupture area, asperity configuration, and hypocenter location. For the variety of rupture areas, we included scenarios that have extremely huge rupture areas, as was proposed by the Japan Central Disaster Management Council of Cabinet Office after the 2011 Tohoku-Oki earthquake. We also included scenarios that have large slip areas near the trough following the lessons learned from the 2011 event. Simulated waveforms and response spectra show a large variation at a site. However, by grouping the simulation results with respect to the source area, we determined that scenarios with wider rupture areas have a larger peak ground velocity and velocity response than those with smaller rupture areas. The influence of the large slip near the trough causes later phases to be large and long. However, the later phases are decreased by using a boxcarlike slip velocity time function instead of a Kostrovlike function and by decreasing rupture velocity. The spatial distribution of the simulated peak ground velocity and velocity response show that the long-period ground motions are amplified particularly on sedimentary basins, where big cities have been established. It is important to consider how to account for the large variation of the simulation results in the seismic hazard assessment. | |||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 書誌情報 |
ja : Journal of Disaster Research en : Journal of Disaster Research 巻 8, 号 5, p. 912-925 |
|||||||||||||||||||||||||
| 出版者 | ||||||||||||||||||||||||||
| 言語 | en | |||||||||||||||||||||||||
| 出版者 | Fuji Technology Press Ltd. | |||||||||||||||||||||||||
| ISSN | ||||||||||||||||||||||||||
| 収録物識別子タイプ | EISSN | |||||||||||||||||||||||||
| 収録物識別子 | 1883-8030 | |||||||||||||||||||||||||
| DOI | ||||||||||||||||||||||||||
| 関連識別子 | 10.20965/jdr.2013.p0912 | |||||||||||||||||||||||||
