摘要
参变量有限元法是一种特别适合于岩土类非线性材料数值计算的新方法。应用圆柱形空腔体扩张理论模拟沉桩挤土效应,考虑土体服从Tresca和Drucker-Prager准则的理想弹塑性本构模型,编制了轴对称应变的参变量有限元程序,对圆柱形孔的内壁位移、桩周土体的应力场、位移场进行了计算分析,并与解析解和ANSYS的解作对比,计算结果表明用参变量有限元法分析沉桩挤土效应是有效的和可行的。
The finite element method based on the parametric variational principle is proved to be a novel way for elasto-plastic analysis of rock and soil. Such method was used to simulate the squeezing effect during pile driving with an axisymmetric deformation under the frame of an ideal elasto-plastic constitutive model and the Drucker-Prager yield criterion. The displacement of the inner wall of cylindrical cavity as well as stress field and displacement field of the soil body were obtained with the numerical computation. These results were compared with the results of analytical solution and ANSYS. It is found that the finite element analysis with parametric variable for solving the problems under consideration is more efficient and suitable than the existing methods.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2005年第7期796-799,共4页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金资助项目(50478090)
湖北省科技攻关项目(2002AA301C93)
关键词
参变量
有限元法
沉桩
挤土效应
二次规划
弹塑性模型
parametric variation
FEM
driven pile
squeezing effect
quadratic programming solution
elasto-plasticity model
