A Study on Effects of Subsurface Soil Properties on the Spatial Variability of Ground Motions

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  • 表層の地盤物性が隣接地点間における地震動の空間変動に与える影響に関する検討

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<p>Effects of subsurface soil properties on the spatial variability of ground motions between adjacent sites are examined by analysis of site response considering heterogeneous soil models. The statistical analyses of coherence of the ground motion indicate that the spatial variability increases as the size of the soil model is increased in the depth direction, but the spatial variability becomes stable even if the soil model is deepened from a certain depth. That depth of the soil model can be considered as the depth that affect the spatial variability of ground motions hr, and it is found that hr becomes deeper as the distance between observation sites gets larger.</p>

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