摘要
在充分考虑真空预压砂井地基特点的基础上,通过引入位移结点数与孔压结点数相异的叠加单元及其对地表边界的齐次化,提出一种适用于真空预压砂井地基三维有限元分析的改进方法。该方法不仅能够有效地减少待求结点位移和孔压数、节省计算机内存,而且还能够避免整体刚度矩阵出现病态。
Based on the characteristics of sand ground improved by vacuum preloading,a modified method for three-dimensional(3D) finite element(FE) analysis of the ground is presented. The method uses the superposed elements in replace of the different nodes of displacements and pore pressures associated with homogenized ground surface,and thus the element numbers of nodal displacements and pore pressures can be reduced and effectively determined. As a result,computer memory resources can be significantly saved,and ill-conditioned stiffness matrix can be properly addressed.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2014年第S1期2936-2941,共6页
Chinese Journal of Rock Mechanics and Engineering
关键词
地基基础
真空预压砂井地基
三维有限元分析
边界齐次化
叠加单元
改进算法
soil foundations
sand ground improved by vacuum preloading
3D FE analysis
homogenized boundary
superposed element
modified method
