格子状地盤改良を有する免震建物の動的相互作用効果の観測と解析

抄録

Recently, the grid-form ground improvement against liquefaction got to be used for buildings. We have many earthquake observation records including the 2011 off the Pacific coast of Tohoku Earthquake at a base-isolated building with the ground improvement. In this paper, we studied the dynamic soil-structure interaction of the building. First, the records concerning the soil-structure interaction were analyzed. Then, the earthquake response analysis was conducted to simulate the observed record using a detailed three dimensional FEM model. In the analysis, the input loss effect was confirmed. Moreover, the contribution of the grid-form ground improvement to the effect was estimated.