建物周囲に設置した地中壁による杭基礎の水平力低減効果

概要

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A method for reducing earthquake load acting on piles by means of diaphragm walls installed around pile foundation is proposed. First, a shaking table test was carried out. Test specimens are 1/40 scale structural models, which consist of soil, piles and a building with or without diaphragm walls. The pile head moment of the specimens with diaphragm walls showed only 60% of that of the specimens without the diaphragm walls. An FEM analysis was carried out for both cases and the results were compared with the test results showing a good agreement. Furthermore, a simplified calculation method is proposed. This method takes account of the inertia force of buildings and the earth pressure to piles. The earth pressure is represented by Winkler's springs. This simplified model gives a good agreement with those experimental and analytical results and is proved to be applicable to design purposes.
社団法人日本建築学会の論文
1995-01-30