考虑空间作用对地下连续墙弹性支点法的改进

RESEARCH ON DIAPHRAGM WALL′S SPATIAL EFFECT BY FINITE ELEMENT OF BEAM ON ELASTIC SUBGRADE

对深基坑挡土结构地下连续墙的弹性支点分析法作了改进，提出了能考虑地下连续墙空间作用的拟空间弹性支点法，运用虚位移原理推导出考虑空间作用的杆单元刚度矩阵。计算结果表明新的方法比传统的弹性支点分析法更为合理。

The finite element method of beam on elastic subgrade is modified to study the spatial effect of diaphragm wall. The element stiffness matrix which can consider the spatial effect of diaphragm wall has been derived. The computed reslt shows that the method of this paper is more reasonable than the traditional finite element method of beam on elastic subgrade commomly used in the designs when the spatial effect of diaphragm wall is considered.