動的な水平載荷を受ける群杭基礎の挙動に関する実験的研究

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This paper deals with the dynamic behavior of a pile-foundation system. Static loading test of a pile in the horizontal direction and dynamic loading test of a 3×3 pile group in the same direction were carried out. The small steel piles used in these tests were 152.4mm diameter, and 7m length. The static cyclic load is applied by a push-pull type hydraulic jack. After the static test, a reinforced concrete foundation (1. 5m×1. 5m×O. 5m) was made on the pile group. The dynamic load is applied by using the vibration generator which is set on the foundation. From these tests, some responses of the pile foundation, the restoring force characteristics, and the strains of pile shafts were obtained. As some significant test results, it was recognized that the resonant frequency and the dynamic stiffness decrease, and the displacement and rocking amplitude increase as the embedment effects of the pile foundation decrease.
社団法人日本建築学会の論文
1991-07-30