UNDRAINED STRESS DISTRIBUTION BY NUMERICAL METHODS
UNDRAINED STRESS DISTRIBUTION BY NUMERICAL METHODS
复制标题
数值方法的不排水应力分布
DOI：
--
复制
发表时间：
1968
期刊：
影响因子：
--
通讯作者：
J. Christian
中科院分区：
文献类型：
--
作者：
J. Christian
不可压缩或不排水土体中的应力分布对工程师来说很重要，但通常的有限差分和有限元方法对于不可压缩材料是无效的。介绍了一种将孔压作为另一个未知数处理的修正方法。具体应用于线弹性材料；然而，该技术也可用于其他应力-应变关系。文中给出了用于有限元的程序形式，以及用于等效于有限差分法的集中参数模型的程序形式。对一个样本问题的结果表明，垂直应力对可压缩性不敏感，并且对其他应力分量的影响更大。不排水和排水分析的对比表明，土体在固结过程中向荷载方向移动。
Stress distribution in incompressible or undrained soil is important to the engineer, but the usual finite difference and finite element methods break down for incompressible materials. A revised procedure is described in which the pore pressure is treated as another unknown. Specific application is made to linearly elastic materials; however, the technique can be used for other stress-strain relations. The paper shows the form of the procedure used for finite elements, and that used for a lumped parameter model equivalent to a finite difference method. Results for a sample problem illustrate the insensitivity of vertical stress to compressibility and show the larger effects on the other stress components. Comparison of undrained and drained analysis shows the motion of soil towards the load during consolidation.