岩土工程学报Issue(12)：2331-2336,6.DOI:10.11779/CJGE201512025
液化地基中群桩基础地震响应分析
Seismic response analysis of pile groups in liquefiable foundations
摘要
Abstract
The seismic analysis of pile foundations in liquefiable ground is an important subject in geotechnical earthquake engineering. A computational model of a 3×5 pile group is established in OpenSees FEM program, and considering soil foundations, the pile group and the upper structure as a system, a unified plastic constitutive model for large post-liquefaction deformation of sand is employed. Special attention is given to the kinematic interaction between piles and soil and distribution of the moment in pile groups. The results show that the soil-pile kinematic interaction has a significant influence on the moment of piles in liquefiable ground. The moment distribution in pile groups indicates that the maximum moment of the corner piles is the largest, and that of the central piles is the smallest. The positions of the maximum moment of different piles are different. The maximum moments in the corner piles and the edge piles are at the interface between the upper layer and the liquefied layer, but the maximum moment in the central piles is at the pile top.关键词
液化地基/群桩基础/有限元/受力分布Key words
liquefied foundation/pile group/FEM/load distribution分类
建筑与水利引用本文复制引用
刘星,王睿,张建民..液化地基中群桩基础地震响应分析[J].岩土工程学报,2015,(12):2331-2336,6.基金项目
国家自然科学基金项目 （）
