大型振動台基礎と周辺地盤の同時地震観測に基づく基礎有効入力動

概要

論文の詳細を見る
The response of a foundation during earthquakes, which includes the effects of inertial and kinematic interactions, is referred to as an effective input motion It expresses the total interaction effects during earthquakes and is regarded as one of the key factors in the soil-structure interaction study This paper discusses characteristics of the effective input motions extracted from earthquake observations of 19 events recorded at a large scale shaking-table-foundation and the surrounding soil. The main findings obtained in this study can be summarized as follows (1) The characteristics and magnitudes of effective input acceleration motions compared to the surface ground motions depend greatly on the frequency components included in the earthquake ground motions (2) The ratio of the vertical effective input motions to the surface ground motions becomes slightly larger than that for the horizontal components (3) The vertical motions at the sides of the foundation due to the rocking motion become as much as a quarter of the vertical ground motion on the soil surface (4) The results of the effective input motions obtained by the analysis of small to mid ground motions differ in magnitude from those obtained for strong around motion records of the Hyogo-ken Nanbu earthquake, but show the similar in tendency
社団法人日本建築学会の論文
2000-11-30