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- W2063164530 abstract "본 연구에서는 조밀한 건조 사질토 지반에서 단말뚝 및 <TEX>$3{times}3$</TEX> 군말뚝에 대해 정현파를 이용하여 동적 원심모형실험을 수행하였으며, 군말뚝의 경우 말뚝 중심간격을 지름의 3배, 5배, 7배로 변화시켜 실험을 실시하였다. 실험 결과로 얻은 단말뚝과 군말뚝의 동적 p-y 곡선들을 비교하여, 말뚝 중심 간격 및 군말뚝 말뚝 위치에 따른 말뚝의 동적 군말뚝 효과를 분석하였다. 분석 결과, 첫 번째 열과 세 번째 열의 말뚝인 측면 말뚝에서 유사한 동적 p-y 거동이 나타났으며, 두 번째 열 말뚝들은 측면 말뚝들에 비해 지반반력 감소 효과가 작게 나타났다. 또한, 두 번째 열 내에서 말뚝 위치에 따른 동적 p-y 거동을 비교한 결과, 두 번째 열의 바깥 말뚝에서 중앙 말뚝보다 지반반력 감소 효과가 크게 나타났다. 실험 결과를 바탕으로 제안된 말뚝 중심 간격에 따른 p-승수 값은 측면 말뚝에서 0.28 ~ 0.77, 중앙 말뚝에서 0.55 ~ 1.0, 바깥 말뚝에서 0.39 ~ 0.87로 나타났다. In this study, a series of centrifuge shaking-table tests for a <TEX>$3{times}3$</TEX> group pile and a single pile applied by sinusoidal wave was performed in dry sand for various pile spacings, ranging from three to seven times the pile diameter. A comparison of centrifuge tests of both single pile and group pile showed that the lateral ground response of the group pile was smaller than that of the single pile. In addition, the reduction in subgrade reaction for the group pile increased with decreasing pile spacing. The side piles, that is, the 1st row and 3rd row piles showed identical dynamic p-y behavior and the center pile in the 2nd row caused a lower reduction effect compared with the 1st and 3rd row piles. From the comparison between the p-y curves of the 2nd row piles, it was found that the lateral ground response of the outer pile in the 2nd row was less than that of the center pile in the 2nd row. The p-multipliers for the side piles, for the center pile and for the outer pile ranged from 0.28 to 0.77, from 0.55 to 1.0 and from 0.39 to 0.87, respectively." @default.
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- W2063164530 date "2012-01-31" @default.
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- W2063164530 title "Evaluation of Dynamic Group Pile Effect in Dry Sand by Centrifuge Model Tests" @default.
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- W2063164530 doi "https://doi.org/10.7843/kgs.2012.28.1.67" @default.
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