CAJ | 학술논문

基于ABAQUS有限元软件,采用主从接触算法模拟桩-土相互作用、修正剑桥模型作为土体本构模型,通过在桩顶施加竖向位移荷载以及合适的网格划分技术建立了较为符合压入管桩压桩实际的有限元模型.利用得到的有限元模型模拟了压入管桩压桩产生的挤土位移场,对不同泊松比时压入管桩单桩挤土位移场进行了对比分析.结果表明:不同泊松比时竖向和水平挤土位移场沿深度方向和径向的分布规律趋于一致;土体泊松比的变化会对压入管桩压桩产生的竖向和水平挤土位移场产生较大影响;泊松比越大,压桩产生的竖向和水平挤土位移越大.
기우ABAQUS유한원연건,채용주종접촉산법모의장-토상호작용、수정검교모형작위토체본구모형,통과재장정시가수향위이하재이급합괄적망격화분기술건립료교위부합압입관장압장실제적유한원모형.이용득도적유한원모형모의료압입관장압장산생적제토위이장,대불동박송비시압입관장단장제토위이장진행료대비분석.결과표명:불동박송비시수향화수평제토위이장연심도방향화경향적분포규률추우일치;토체박송비적변화회대압입관장압장산생적수향화수평제토위이장산생교대영향;박송비월대,압장산생적수향화수평제토위이월대.
On the basis of the finite element software ABAQUS,an appropriate finite element model which adopts contact algo?rithm to simulate the interaction between pile and soil and utilizes the modified Cambridge model as the constitutive model of soil is given according to the actual piling process of press?in pipe pile through vertical displacement loading on pile top and suitable mesh technology. The pile?sinking process is simulated and the compacting displacement field is studied through this new finite element model. The comparative analysis of compacting displacement field of single press?in pipe pile is carried out under different Poisson rations of soil. The result shows that the distribution rule of vertical and horizontal displacement with the radial distances or with the depths at different Poisson rations tends to be same. The variation of Poisson ration of soil could greatly affect the vertical and horizon?tal compacting displacement field caused by the pile?sinking of press?in pipe pile. The bigger Poisson ration of soil is,the bigger verti?cal and horizontal compacting displacements are.