THIN LAYER METHOD SIMULATION OF NEAR SOURCE GROUND MOTIONS DUE TO DISCRETIZED DISLOCATIONS IN LAYERED SOILS

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  • 薄層要素に基づく離散ディスロケーション法による断層近傍地震動のシミュレーション
  • ハクソウ ヨウソ ニ モトヅク リサン ディスロケーションホウ ニ ヨル ダンソウ キンボウ ジシンドウ ノ シミュレーション

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Abstract

A new technique, based on the kinematic model for dislocation is developed for simulating ground motions caused by fault ruptures. The concerned motions are solved by the convolution scheme in time for source function and in space along rupture direction with the relevant Green function obtained by the thin layer method along depth. The Laplace transform is used for the former and the Fourier transform for the latter. Focused points in the formulation are the effects of asperity distribution, soil layering and rupture process on the transient response. The validation is made from the existing work for a Haskell rupture model in layered soil and a Kostrov model in uniform halfspace soil.

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