基于剪切位移法的两桩相互作用的非线性分析

当减少沉降桩基础用于8层以上建筑中时，桩的工作状态既不同于常规桩基础中的弹性状态，也不同于当桩用于8层以下建筑中时的极限状态(完全塑性，进入非线性工作状态)，而是介于两者之间。从分析结果的精确性和方法的实用性出发，用三折线模型来模拟土体的非线性，用广义剪切位移法建立了单桩分析模型，以此计算两桩相互作用系数。初步的算例分析与对比表明，此方法有一定的实用价值。

Non-linear Analysis of Interaction of two Piles Based on Shear Displacement Method

When settlement-reducing piles are applied in the building of more than 8 floors, their behavior are neither in elastic state nor in limited-equilibrium state as piles used in the building below 8 floors(completely plastic, nonlinear state). From the points of analytical precision and utility of method, trilinear load transfer function is used to simulate the non-linearity of soil and generlized shear displacement method is applied to analyze single pile. The interaction factor between two piles are calculated by this model.The analysis and comparison of examples shows that this method is feasible in practical engineerings.