Results 11 to 20 of about 11,928 (261)
Frontiers in Built Environment, 2020 This paper aims to develop a hysteretic–viscous hybrid (HVH) damper system for long-period pulse-type earthquake ground motions of large amplitude.
Shoki Hashizume, Izuru Takewaki
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Earthquake Science, 2022 Strong ground motions caused by earthquakes with magnitudes ranging from 3.5 to 6.9 and hypocentral distances of up to 300 km were recorded by local broadband stations and three-component accelerograms within Georgia’s enhanced digital seismic network ...
Nato Jorjiashvili +4 more
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Geoenvironmental Disasters, 2023 Background The Bangkok Basin has been known from non-instrumental observations of the local population to be subject to ground motion amplification due to the deep alluvial sediments and basin geometry.
Teraphan Ornthammarath +6 more
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Earth, Planets and Space, 2021 We conducted centroid moment tensor (CMT) inversions of moderate (Mw 4.5–6.5) earthquakes in the Kanto region, Japan, using a local three-dimensional (3D) model.
Shunsuke Takemura +2 more
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Simulation of long-period ground motion near a large earthquake [PDF]
Bulletin of the Seismological Society of America, 1997 AbstractWe estimated the possible range of long-period ground motion for sites located on a soft sedimentary basin in the immediate vicinity of a large earthquake. Since many large cities in the world (e.g., Los Angeles, San Francisco, and Tokyo) where many large structures have been recently constructed are located in this type of environment, a ...
Minoru Takeo, Hiroo Kanamori
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An Early Forecast of Long‐Period Ground Motions of Large Earthquakes Based on Deep Learning
Geophysical Research Letters, 2023 Long‐period (LP; approximately 2–10 s) ground motions generated by large earthquakes are amplified in large basins and threaten high‐rise buildings in modern cities.
Takashi Furumura, Yusuke Oishi
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A METHOD FOR ESTIMATING LONG PERIOD GROUND MOTION IN A BASIN
Doboku Gakkai Ronbunshu, 2001 本論文では, 盆地内のやや長周期地震動を簡便に推定する手法を提案する. ここで提案する手法は, 盆地内のやや長周期地震動は震源から到来する地震動と, 盆地境界部で生成される盆地生成表面波とで構成されるとし, 前者の地震動は平行成層モデルで求め, 後者は盆地境界におけるエネルギー流量の保存則を用いて推定するものである. 本論では, まず推定手法の説明を行い, 次に単純な形状をした盆地モデルに提案手法を適用し, 三次元境界要素法の計算結果と比較することで手法の妥当性を示す. さらに, 兵庫県南部地震を対象に, 関西地震観測研究協議会の福島観測点および尼崎観測点における地震動を推定し, 観測記録と比較することで, 提案手法が実地震にも適用可能であることを示す.
Shun'ichi KATAOKA, Tatsuo OHMACHI
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Attenuation and Amplification of Long-Period Component of Ground motion
Journal of Japan Association for Earthquake Engineering, 2011 中央防災会議「東南海、南海地震等に関する専門調査会」1は、各専門調査会において構築した深部地下構造モデルを用い、修正を加えて全国の深部地下構造モデルを構築し、その地下構造モデルより計算される全国の深部地盤の一次固有周期の分布図を「長周期地震動の揺れやすさマップ」として公表した。この深部地盤モデルをもとに、筆者らは、全国の地点における長周期地震動の増幅特性を調査し、深部地盤の一次固有周期が長いほど長周期地震動の増幅が大きくなることを見いだした。そして、長周期地震動の増幅率と深部地盤の一次固有周期との関係を整理し、深部地盤の影響を考慮した距離減衰式を考案した。
Takashi, Yokota +4 more
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Seismic Fragility Assessment of Steel SMRF Structures under Various Types of Near and Far Fault Ground Motions [PDF]
Journal of Rehabilitation in Civil Engineering, 2019 In this paper, the seismic collapse probability of special steel moment-resisting frame (SSMRF) structures, designed to 4th edition of Iranian seismic design code, under near fault pulse-like and far fault ordinary ground motions is evaluated through ...
Morteza Razi +3 more
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地球与行星物理论评, 2022 According to the geological and geomorphic characteristics of the Sichuan-Yunnan area, previous geological data and the preliminary inversion results of source parameters of the Yangbi MS6.4 earthquake in 2021, we established a three-dimensional velocity
Zhiwei Ji, Xueliang Chen, Bo Zhang
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