有限棱柱法对单桩与土相互作用系统的弹塑性分析

用有限棱柱单元法对采用长桩的单桩与土相互作用系统进行了三维弹塑性分析，并开发出一种可模拟半无限空间地基土边界条件的无限棱柱元．计算中考虑了承台对地基土的约束作用及桩土之间的竖向相对位移，地基土的本构模型采用修正剑桥模型．分析了集中荷载作用下摩擦长桩与土相互作用系统，得到了合理的荷载－沉降曲线及桩侧摩阻力的分布曲线，为长桩的研究与设计提供了一种有效的计算方法

THE APPLICATION OF THE FINITE PRISM ELEMENT METHOD TO THE ELASTO PLASTIC ANALYSIS OF SINGLE PILE SOIL INTERACTION SYSTEM

In this paper, a finite prism element procedure is presented, and a new infinite prism element for modelling the semi infinite domain boundary condition is developed to expedite the (3D) calculations in a more accurate way for the far stress field to the pile. It has been taken into account that the soil is restrained by the pile cap, and the relative displacement happens between the pile and the soil. Revised Cambridge model is incoporated in the procedure for modelling elasto plastic behavior of the soil. In this paper, the single long friction pile with a pile cap and soil system are analyzed. The proper load displacement curve and frictional resistance distribution curve are obtained. The results can provide the basis for design and calculation of the long piled foundation.