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タイトル: Crustal Deformation Associated with a Fault Formation Estimated by the Finite Element Method.
その他のタイトル: 有限要素法を使って求めた断層形成に伴う地殻変形
著者: 笠原, 順三
著者(別言語): Kasahara, Junzo
発行日: 1978年9月30日
出版者: 東京大学地震研究所
掲載誌情報: 東京大学地震研究所彙報. 第53冊第2号, 1978.9.30, pp. 339-357
抄録: Crustal deformations associated with fault formation are calculated by the finite element method. Four dip angles are considered : (1) vertical ; (2) 45 degrees ; (3) 26.7 degrees ; and (4) horizontal. A low elasticity area is hypothesized as a fault zone. Sets of double couple forces are applied for a fault. Effects due to several variables (boundary condition, fault thickness, fault length and fault depth) are examined, and surface deformations are calculated. Boundary conditions affect the magnitude of surface deformation ; depth, length and thickness of a fault affect not only the magnitude, but also the pattern of deformation. For two cases, displacement field and stress field are shown. Using comparisons of the above crustal deformations and field data in the Mikawa earthquake of 1945 (M=7.1), a best-fit model for fault parameters is obtained. The model is in fairly good agreement with that obtained by Ando's dislocation model.
URI: http://hdl.handle.net/2261/12660
ISSN: 00408972


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