变刚度群桩基础工作性状数值分析  

Numerical Analysis of Characters of Varying Rigidity Pile Group

作　　者：钱晓丽[1] 

机构地区：[1]福建工程学院土木工程系,福建福州350007

出　　处：《南京工程学院学报（自然科学版）》2008年第2期32-37,共6页Journal of Nanjing Institute of Technology(Natural Science Edition)

基　　金：福建省青年人才创新项目(2007F3004);福建省教育厅科技项目(JB02225);福建工程学院引进人才科研启动项目(GY-Z0706)

摘　　要：在室内桩基础模型试验的基础上,用三维有限元的方法,考虑了土体的非线性(D rucker Prager模型)力学性能,对模型桩进行了六大组的数值模拟试验.从沉降、桩顶反力、桩土承担荷载比等几方面验证了变刚度群桩基础能减小桩顶反力差值,从而减小差异沉降的特性.为理论分析变刚度桩的工作性状提供了参考.On the basis of model tests of indoor piles, six types of numerical tests were undertaken by following three-dimensional finite element analysis which took into consideration the nonlinear mechanical characteristics （ Drucker - Prager Model）. It turned out that varying rigidity pile group is able to reduce the pile-soil stress ratio in terms of settlement, pile- stress ratio and pile-soil load ratio, thus reducing differential settlement. This serves as helpful reference for a theoretical analysis of working properties of varying rigidity piles.

关 键 词：变刚度 数值模拟 桩顶反力 差异沉降 

分 类 号：TU473.1[建筑科学—结构工程]