The study of shaking table test about single pile-soil dynamic interaction in the liquefied foundation soil

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Journal of Vibration and Shock ›› 2012, Vol. 31 ›› Issue (20) : 189-192.

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The study of shaking table test about single pile-soil dynamic interaction in the liquefied foundation soil

HUANG Zhan-fang1,2,WANG Xian-yao1, WU Zhi-an1,BAI Xiao-hong1

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Abstract

Based on the shaking table tests, the dynamic responses were observed about pile-soil- structure(PSSI) in the earthquake. The soil in the different depth liquefied with the continuous increase of excess pore water pressure in the vibration process, and the top soil first reached liquefaction. Pile side friction reduced greatly after the soil liquefied, the most of load of the upper structure was beared on bearing stratum, the vertical bearing capacity of pile foundation reduced significantly, the larger settlement of the upper structure produced. At the same time, the PSSI amplified earthquake reaction of the bottom super-structure. In this study, the pile-soil-structure dynamic interaction was understood deeply during liquefaction, which helps to build optimized method of seismic design of pile foundation.

Key words

liquefaction / pile-soil-structure / seismic response / pore pressure ratio / side friction / settlement / acceleration

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HUANG Zhan-fang;WANG Xian-yao;WU Zhi-an;BAI Xiao-hong. The study of shaking table test about single pile-soil dynamic interaction in the liquefied foundation soil[J]. Journal of Vibration and Shock, 2012, 31(20): 189-192