使用修正变分法分析抗拔单桩和群桩的变形

抗拔桩常被应用于地下构筑物的抗浮和受较大弯矩作用高耸构筑物的基础。根据最小势能原理,使用修正变分法来分析抗拔单桩和抗拔群桩的变形。在传统变分方法的基础上,本文将抗拔群桩的变形分析简化为计算一个2×2维矩阵,使得群桩变形分析时间大大缩短。通过与模型试验结果进行比较,该方法不但可以节省单桩和群桩变形分析时间,而且计算结果与实测结果也比较相近。

Analysis for deformation of single tension pile and pile groups using modified variational approach

Tension piles are widely used for resisting uplift loads of underground structures such as deep basement and underground transformer substation,and foundations for tall buildings subjected to high bending moments.According to the principle of the minimum potential energy,the deformation of single tension pile and pile groups was analyzed using a modified variational approach.Based on the conventional variational approach,a simple approach was presented so that the deformation of tension pile groups could be solved by calculating a 2×2 array.Compared with the results of model experiment,the present method could not only save a large amount of computing time but also give reasonable results.