建物・杭-地盤連成質点系の相対剛性による地震時杭頭被害の考察 : 阪神淡路大震災の事例に基づいて

概要

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Authors have already shown that the damage to buildings and the foundations in Hanshin-Awaji Earthquake can be arranged by those natural periods. Many of those cases were pile foundations. In this paper, first of all, the structural characteristic coefficient Ds including the influence of the ground was examined. Soil-structure interaction system was applied to pile foundations, and the above-mentioned result was verified by the numerical analysis in the ground and the building that had been modeled like showing the damage case. It was shown to be able to explain the verified tendency according to the difference of the rigidity between the superstructure and the pile foundation. In conclusion, it was shown that it was more reasonable to use the stiffness ratio of pile foundation that was similar to the definition with the column and considered the influence of the ground for an earthquake-proof design than to use an underground seismic intensity in the pile foundations.
社団法人日本建築学会の論文
2008-06-30