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  1. 131 地震研究所
  2. 東京大学地震研究所彙報
  3. 60
  4. 1
  1. 0 資料タイプ別
  2. 30 紀要・部局刊行物
  3. 東京大学地震研究所彙報
  4. 60
  5. 1

Mechanical Interaction between Neighboring Active Faults : Static and Dynamic Stress Field Induced by Faulting

https://doi.org/10.15083/0000032902
https://doi.org/10.15083/0000032902
a3f78d07-607d-44cb-8078-1e2f8048e78e
名前 / ファイル ライセンス アクション
ji0601001.pdf ji0601001.pdf (1.4 MB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2008-05-30
タイトル
タイトル Mechanical Interaction between Neighboring Active Faults : Static and Dynamic Stress Field Induced by Faulting
言語 en
言語
言語 eng
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
ID登録
ID登録 10.15083/0000032902
ID登録タイプ JaLC
その他のタイトル
その他のタイトル 活断層の相互力学作用 : 断層運動による静的・動的応力場
著者 加藤, 照之

× 加藤, 照之

WEKO 128300

加藤, 照之

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笠原, 慶一

× 笠原, 慶一

WEKO 128301

笠原, 慶一

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著者別名
識別子Scheme WEKO
識別子 128302
姓名 Rybicki, Kacper
著者別名
識別子Scheme WEKO
識別子 128303
姓名 Kato, Teruyuki
著者別名
識別子Scheme WEKO
識別子 128304
姓名 Kasahara, Keichi
著者所属
著者所属 東京大学地震研究所
抄録
内容記述タイプ Abstract
内容記述 The seismic disturbances that a potentially active fault receives from a slip on a neighboring fault might be considered as nature's mechanical stability. The problem of static and dynamic stress fields induced by faulting is analysed as a way to estimate the stability of nearby active faults. The source fault is modelled by a Volterra dislocation of a strike-slip type along a vertical surface embedded in an elastic homogeneous infinite medium for both dynamic and static models. In order to represent quantitatively a resultant effect of stress caused by the source fault, a new scalar quantity is introduced in reference to the results of laboratory studies on fault friction. This quantity, which is called the resultant stress, is the linear combination of shear and normal components of the induced stress vector acting on the potential fault which is assumed to be parallel to the source fault. The spatial distribution of the static resultant stress in the seismogenic layer, which was calculated in the semiinfinite medium, indicates four regions around the source where the resultant stress takes positive values. These regions extend from the fault surface and in the direction close to the strike of the fault. The probability of further fracture in these regions increases as a result of stress redistribution in the medium due to faulting. The dominant characteristics of the dynamic stress field is the strong directivity effect, which is especially apparent in the case of a unilateral rupture. The correlation between the static and the dynamic field is also notable. The maximum values of the dynamic resultant stress are of the order of 10 bars at distances comparable to fault dimensions, if we assume a fault model which is equivalent to a M7.0 earthquake. The ratio of maximum dynamic stress to the corresponding static stress takes the values ranging from a few to 50 bars or more, depending on the location of an observer and the character of rupture propagation. This means that if a potentially active fault is located in the vicinity of a seismic source, then it could be loaded with high dynamic stress whose peak value would be equivalent to tens of years of stress accumulation at a normal tectonic rate. Such interpretation, however, must be checked carefully with respect to the time-dependence effect of applied stress on material strength.
書誌情報 東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo

巻 60, 号 1, p. 1-21, 発行日 1985-09-05
ISSN
収録物識別子タイプ ISSN
収録物識別子 00408972
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AN00162258
フォーマット
内容記述タイプ Other
内容記述 application/pdf
日本十進分類法
主題Scheme NDC
主題 453
出版者
出版者 東京大学地震研究所
出版者別名
Earthquake Research Institute, University of Tokyo
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