正弦波多軸入力による剛体基礎の浮上り性状に関する研究

概要

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The primary purpose of this paper is to describe how the base slab uplift would be affected by three directional motions and to discuss the problem on analytical method commonly used for the evaluation of uplift. The model considered in this study is a rigid body, and harmonic excitations were used for the analysis. From analytical result, the following conclusions were drawn. 1) Vertical ground motion does not give a significant effect on base slab uplift. 2) Orthogonal two components of horizontal ground motions give a significant effect on uplift. 3) Even though any vertical ground motion is not imposed, comparatively large vertical acceleration is caused by vertical movement due to base slab uplift especially in the short period region. 4) Static method based on linear analysis (which ingnores the nonlinear soil structure interaction effects of base slab uplift) predicts the uplift suitably as far as the uplift retio is smaller than 20 percent. 5) Energy balance technique gives smaller uplift ratio than the other methods. 6) Three directional motion gives a significant effect on floor response spectra and increases the value in short period region.
社団法人日本建築学会の論文
1984-06-30