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当前位置: 首页 > 文章 > 基于流体力学方法的液化后砂土流滑推桩效应 江苏大学学报(自然科学版) 2018 (3) 343-348
Position: Home > Articles > Push pile effect of post-liquefied sand flow slip based on fluid mechanics method Journal of Jiangsu University (Natural Science Edition) 2018 (3) 343-348

基于流体力学方法的液化后砂土流滑推桩效应

作  者：
陆建飞;朱晓冬;周恩全;左熹;王炳辉
单  位：
金陵科技学院建筑工程学院;江苏大学土木工程与力学学院;江苏科技大学土木工程与建筑学院
关键词：
砂土;桩;流滑;VOF方法;牛顿流体;非牛顿流体
摘  要：
采用计算流体动力学(CFD)中的流体体积(VOF)方法和固体力学中的有限元法,对液化后砂土流滑的推桩效应进行研究.将液化后砂土分别视为牛顿流体和剪切稀化非牛顿流体,将单桩视为线弹性结构,分析了牛顿流体黏度、非牛顿流体稠度系数和流动指数对推桩效应的影响.研究结果表明:将液化后砂土视为牛顿流体,则距离桩顶越近,桩身位移越大,距离桩底越近,桩身应力就越大;随着液化后砂土黏度的增大,桩身位移和应力也越大,曲线间差距则越来越小;将液化后砂土视为剪切稀化流体,沿桩身的响应规律与牛顿流体一致;稠度系数和流动指数的变化只会影响桩身位移和应力数值的变化,对变形方式不会产生影响.
译  名：
Push pile effect of post-liquefied sand flow slip based on fluid mechanics method
作  者：
LU Jianfei;ZHU Xiaodong;ZHOU Enquan;ZUO Xi;WANG Binghui;Faculty of Civil Engineering and Mechanics,Jiangsu University;Architectural Engineering Institute,Jinling Institute of Technology;School of Architecture and Civil Engineering,Jiangsu University of Science and Technology;
单  位：
LU Jianfei%ZHU Xiaodong%ZHOU Enquan%ZUO Xi%WANG Binghui%Faculty of Civil Engineering and Mechanics,Jiangsu University%Architectural Engineering Institute,Jinling Institute of Technology%School of Architecture and Civil Engineering,Jiangsu University of Science and Technology
关键词：
sand;;pile;;flow slip;;VOF method;;Newtonian fluid;;non-Newtonian fluid
摘  要：
Baced on the fluid volume(VOF) method in computational fluid dynamics(CFD) and the finite element method in solid mechanics,the push pile effect of post-liquefied sand flow slip was investigated. The post-liquefied sand was regarded as Newtonian fluid and shear thinning non-Newtonian fluid with single pile regarded as linear elastic structure,and the effects of viscosity,consistency coefficient and flow index on the pushing pile effect were analyzed. The results show that when the postliquefied sand is regarded as Newtonian fluid,the shorter the distance from the top of pile is,the larger the displacement is,while the shorter the distance from the bottom of pile is,the greater the pile stress becomes. With the increasing of the viscosity of post-liquefied sand,the displacement and the stress of pile are increased,and the gap between the curves is decreased. When the post-liquefied sand is regarded as shear thinning fluid,the response law along the pile body is consistent with that of Newtonian fluid. The changes of consistency coefficient and flow index only affect the pile body displacement andstress magnitude without impact on deformation mode.

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