摘要
利用ANSYS对2.3 d2、.5 d3、d3、.5 d桩距的某特高压大跨群桩基础进行了三维弹塑性分析。通过无厚度的接触面单元模拟桩-土之间的非线性接触特性,采用Drucker-Prager弹塑性本构模型描述土的非线性特性,桩取为弹性,得到了上拔和下压两种荷载组合下的桩基轴力以及土体应力位移,分析结果证明合理减小最小桩距,节省材料及优化基础设计是可行的。
ANSYS is used to carry out 3 d elastoplastic finite element analysis on the UHV big leap foundation of 2.3 d,2.5 d,3 d and 3.5 d pile spacing. Non-thickness contact element is employed to simulate the nonlinear behavior of pile-soil interaction. Drucker-Prager elastoplastic constitutive model is adopted to represent nonlinear behavior of soil, the pile being assumed to be elastic. Settlement, foundation axial force and soil stress displacement under uplift force and down force,it is possible to reduce the minimum distance of pile reasonably from the results.
出处
《电力学报》
2009年第2期94-100,共7页
Journal of Electric Power
关键词
群桩基础
桩-土作用
最小桩距
弹塑性分析
group of piles foundation
soil-pile interaction
the minimum pile spacing
elastic-plastic analysis
