桩筏基础桩-土相互作用的数值分析  

NUMERICAL ANALYSIS OF PILE-SOIL INTERACTION OF PILED RAFT FOUNDATION

作　　者：陈亚东[1] 宰金珉[1] 戚科骏[1] 

机构地区：[1]南京工业大学土木工程学院,南京210009

出　　处：《建筑技术》2008年第5期377-380,共4页Architecture Technology

基　　金：国家自然科学基金项目(项目编号:50478005)

摘　　要：利用ABAQUS对3D桩距和6D桩距的桩筏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Mohr-Coulomb弹塑性本构模型描述土的非线性特性,桩取为弹性,得到了沉降、桩土荷载分担比、板底土附加应力等变化情况,并对二者进行了对比分析。分析结果基本反映了桩-土-筏的实际工作性状,验证了复合桩基理论的正确性。ABAQUS is used to carry out 3D elastoplastic finite element analysis on the piled raft foundation of 3D. and 6D pile spacing. Non-thickness contact element is employed to simulate the nonlinear behavior of pile-soil interaction. Mohr-coulomb elastoplastic constitutive model is adopted to represent nonlinear behavior of soil, the pile being assumed to be elastic. Settlement, load sharing percentage and additional stress under the raft are obtained, and then compared for the two spacing cases. The analysis results basically reflect the actual work properties of pile-soil raft, and verify the correctness of composite pile foundation theory.

关 键 词：桩筏基础 数值分析 沉降 

分 类 号：TU473[建筑科学—结构工程]