2005 Fiscal Year Final Research Report Summary
A study on construction of databases for high-precision prediction of long period motions on sedimentary basin
| Project/Area Number |
14205081
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
SEO Kazuoh Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Professor (30089825)
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| Co-Investigator(Kenkyū-buntansha) |
YAMANAKA Hiroaki Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Associate Professor (00212291)
KINUGASA Yoshihiro Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Professor (30313365)
MOTOKI Kentaro Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Assistant Professor (60334520)
MIZUTA Toshihiko Akita National College of Technology, Civil and Environmental Engineering, Associate Professor (30342455)
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| Project Period (FY) |
2002 – 2005
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| Keywords | long period motion / earthquake observation / microtremor array measurement / model of subsurface structure / ground motion simulation / database |
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| Research Abstract |
In order to construct a database for high precise estimation of long period motions, we have performed explorations of subsurface structure, earthquake observation, analysis of earthquake motions, and theoretical simulation with 2D or 3D model. The results are as follows.
1) Microtremor array measurements and mobile microtremor measurements were conducted. The target areas are Kanto basin, Tokachi basin, Ojiya area, the basins in Shikoku island, Shonai basin, Akita basin, Tottori basin. Some disastrous earthquakes occurred near some of them. In addition to the measurements, fundamental techniques have been developed, for example, high performance heuristic method and simultaneous inversion with another data set.
2) Seismometers were installed on Kanto basin to investigate how the surface waves which mainly consist of long period motions were generated and amplified. It was successfully observed that the duration of the earthquake motions was getting long inside of the basin and the later phases looked to be spread from the edge of the basin. In addition to the observation, we conducted aftershock observations of the disastrous earthquakes that occurred in this research term, and the effects of surface geology, which cause the damage were experimentally evaluated.
3) The mechanism to generate and amplify the surface waves from the basin edge was made clear using 2D model of the eastern part of Kanto basin. Furthermore, the ground motion simulation with 3D model of Kanto basin was performed to reproduce completely the seismic wave-field. This simulation was applied to the small earthquakes to confirm the validity of the model, and the characteristics of observed motions could be reproduced. To aim for the precise agreement in waveforms, it is necessary to modify this 3D model.
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[Presentation] 仙台市松森周辺における余震・微動観測と地盤震動特性2005
Author(s)
Yu YAMAMOTO, Masashi ABE, Masato MOTOSAKA, Hiroaki YAMANAKA, Kentaro MOTOKI
Organizer
Annual meeting Japan soc. of Natural Disaster Science
Place of Presentation
Tohoku Univ.
Year and Date
20051117-20051118
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 天井落下被害を受けた空間構造物の地震観測に基づく動的応答性状2005
Author(s)
Masato MOTOSAKA, Hiroaki YAMANAKA, Kentaro MOTOKI, Yu YAMAMOTO, Masashi ABE
Organizer
Annual meeting Japan soc. of Natural Disaster Science
Place of Presentation
Tohoku Univ.
Year and Date
20051117-20051118
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 微動アレイ観による四国主要平野でのS波速度構造の推定2005
Author(s)
Hiroaki YAMANAKA, Kentaro MOTOKI, Masanari MURAYAMA, Kiminobu ETO, Nobuhiko KOMABA, Yasuyuki KAMIMURA, Tomoaki YOSHIMURA, Yasuo UCHIYAMA
Organizer
JAEE meeting
Place of Presentation
Waseda Univ.
Year and Date
20050111-20050113
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 十勝平野南部における微動アレイ観測2004
Author(s)
アムール・アガン, 山中浩明, 元木健太郎, 駒場信彦, 上村康之, 大田原薫, 笹谷努, オウズ・オゼル, 三浦尚史, 高井伸雄, 清水学
Organizer
日本地震学会講演予稿集秋季大会
Place of Presentation
九州大学
Year and Date
2004-10-11
Description
「研究成果報告書概要(和文)」より
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[Presentation] 島根県浜田市の常時微動特性2004
Author(s)
足立正夫, 元木健太郎, 瀬尾和大
Organizer
日本地震学会秋季大会講演会
Place of Presentation
九州大学
Year and Date
2004-10-11
Description
「研究成果報告書概要(和文)」より
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[Presentation] Microtremor array exploration in southern part of Tokachi plain2004
Author(s)
A. Agan, Hiroaki YAMANAKA, Kentaro MOTOKI, Nobuhiko KOMABA, Yasuyuki KAMIMURA, Kaoru OHTAHARA, Tsutomu SASATANI, O. Ozel, N. Miura, N. Takai, G. Shimizu
Organizer
Fall meeting SSJ
Place of Presentation
Kyushu Univ.
Year and Date
2004-10-11
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 宮城県北部地震の震源域の地盤構造と地盤増幅特性2004
Author(s)
Hiroaki YAMANAKA, Kentaro MOTOKI, Nobuhiko KOMABA, Yasuyuki KAMIMURA, Masanari MURAYAMA
Organizer
2003年宮城県北部地震シンボジウム
Place of Presentation
Heanel Sendai
Year and Date
2004-01-31
Description
「研究成果報告書概要(欧文)」より
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[Presentation] ニューラルネットワークによる強震記録の初動走時の読み取り2003
Author(s)
Hiroaki YAMANAKA, Aki HIDANI, Nobuyuki YAMADA
Organizer
Annual meeting Japan soc. of Natural Disaster Science
Place of Presentation
Kochi Univ.
Year and Date
2003-09-18
Description
「研究成果報告書概要(欧文)」より
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[Presentation] 微動観測に基づく北上盆地における地盤振動特性2003
Author(s)
Kentaro MOTOKI, Victor RODORIGUEZ, Shigeru ARAI
Organizer
Annual meeting Japan soc. of Natural Disaster Science
Place of Presentation
Kochi Univ.
Year and Date
2003-09-18
Description
「研究成果報告書概要(欧文)」より
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