扩径桩抗压性能的颗粒流数值模拟  

PARTICLE FLOW CODE NUMERICAL SIMULATION OF PILEWITH EXPANDED DIAMETER UNDER COMPRESSIVE LOAD

作　　者：柴浩[1] 郑刚[1] 尹金凤[2] 

机构地区：[1]天津大学土木工程系,天津300072 [2]天津市建筑科学研究院,天津300193

出　　处：《工业建筑》2007年第5期57-60,共4页Industrial Construction

摘　　要：采用二维颗粒流分析程序对扩径桩抗压试验进行数值模拟分析,并与现场试验结果进行对比。应用PFC2D程序,研究扩径桩在试验过程中时步-位移曲线、桩土颗粒排列变化及颗粒位移的变化。通过不同受荷阶段桩土细观力学特征的对比分析,得出桩在下压达极限荷载时的破坏性状。绘制桩在受荷过程中的荷载-位移曲线,并与实测值进行对比分析。Based on the theory of Particle Flow Code in 2 Dimensions （ PFC2D ）, a pile with expanded diameter that is compressed is studied, and is compared with the results of actual pile tests. Using PFC2D , the time step-displacement curve, the change of particle position and the displacement of particles are studied. Through the comparison of micromechanical properties of pile and soil during loading, the failure behavior of pile whose ultimate load is reached is also obtained. The relations between load and displacement are simulated and compared with the results of actual pile tests.

关 键 词：颗粒流 数值模拟 扩径桩 下压荷载 

分 类 号：TU473.1[建筑科学—结构工程]