Dynamic Analysis of Single Pile in Liquefied Soils Considered as Newtonian Fluid
Dynamic Analysis of Single Pile in Liquefied Soils Considered as Newtonian Fluid作者机构：The 3rd Geological Brigade of Jiangsu Geology & Mineral Exploration Bureau Nanjing China Urban Underground Space Research Center Nanjing Tech University Nanjing China
出 版 物：《Open Journal of Geology》 (地质学期刊（英文）)
年 卷 期：2021年第11卷第2期
页 面：19-37页
学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程]
主 题：Pile Liquefaction-Induced Lateral Spreading Newtonian Fluid CFD Method
摘 要：Case histories have shown that the liquefaction-induced soil lateral spreading is one of the main causes of damage to pile foundations subjected to seismic loading. Post-liquefaction soil behaves similarly to a viscous fluid. This study investigated the effect of soil lateral spreading on a single pile based on fluid mechanics in which the liquefied soils were treated as Newtonian fluids. A numerical simulation on a single pile embedded in a fully saturated sandy foundation was conducted and compared with shake table tests. The lateral flow effect and the effect of shear strain rate were discussed. After liquefaction, the acceleration of the foundation shows that there are no obvious spikes and finally reaches a stable state. The presented method can predict the pile response better than p-y curve method. A parametric study was performed to explore the effect of several influence factors on pile behaviors. The results show that the pile head displacement decreases and the maximum bending moment at pile bottom increases with the increase of bending stiffness. With the same pile bending stiffness, the displacement and bending moment of pile increase with the increase of soil viscosity and acceleration amplitude.
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