基于修正剑桥模型桩的有限元分析  

FINITE ELEMENT ANALYSIS OF PILE BASED ON MODIFIED CAM-CLAY MODEL

作　　者：李婷[1] 杨鼎久[1] 

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225009

出　　处：《建筑技术开发》2012年第3期23-27,共5页Building Technology Development

摘　　要：将桩挤土过程视作沿桩长不变的一系列点位形成的球形扩张过程,把扩张过程中的桩周土体分成3个区域:流动区域、塑性变形区和弹性变形区。应用圆孔扩张理论,结合修正剑桥模型推导出了球形孔扩张引起的土体应力、位移分布解析解,并与有限元ABAQUS模拟的结果对比分析。Pile is considered as a series of constant along the length of the spherical cavity expansion point forming process. The stress distribution due to the spheric cavity expansion is diveded into three zones： flow damage, plastic deformation zone and elastic deformation zone. The analytical expression for distribution of the stress and displacement could be deduced on the basis of the cavity expansion theory combining with the Modified Cam-clay model. Then compared with the result of the finite element ABAQUS .

关 键 词：桩 挤土效应 圆孔扩张理论 修正剑桥模型 

分 类 号：TU473.1[建筑科学—结构工程]