摘要
采用三维有限元程序分析了桩距对竖向荷载作用下超长群桩的承载性状的影响。土体本构关系采用Duncan-Chang双曲线非线性弹性模型,桩、承台采用线弹性模型,桩-土界面采用刚塑性无厚度接触面模型。讨论了桩距对超长群桩荷载-沉降关系、摩阻力分布、承台底土荷载分担比、基桩之间的荷载分配以及基桩之间的沉降差异的影响。得到了超长群桩承载性状与桩距之间相互关系的一些规律,对实际的工程实践具有一定的指导意义。
Using the 3D finite element method,the bearing capacity behavior and load transfer mechanism of super-long pile groups with different pile space have been analyzed. Duncan-Chang nonlinear elastic model is used to simulate the constitutive relation of soils,linear elastic model is used to simulate the constitutive relation of concrete; and the Goodman model is adopted in contact plane. Influences of pile space upon load-settlement,distribution of Lateral friction resistance,the ratio of loads distribute to the soil beneath pile cap to the total loads,load distribution among piles,differential settlement among piles, have been analyzed. Some action laws of super-long pile groups with different pile space are obtained. And some references for theoretical research and engineering practice are provided.
出处
《建筑技术开发》
2013年第5期18-21,共4页
Building Technology Development
关键词
超长桩
群桩
有限元
桩距
super-long piles
pile groups
Finite element analysis
pile space
