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深基坑支护结构变形的三维有限元分析与模拟
引用本文:赵海燕,黄金枝.深基坑支护结构变形的三维有限元分析与模拟[J].上海交通大学学报,2001,35(4):610-613.
作者姓名:赵海燕  黄金枝
作者单位:上海交通大学建筑工程与力学学院,
摘    要:在工程实践中,对于深基坑开挖过程的模拟计算多采用平面应变分析方法,但由于深基坑开挖实际上是三维过程,平面分析忽略了开挖墙角处的三维效应,因此,计算结果偏于保守,为此,研究了不同有限元网格划分下基坑变形的情况,提出一种非线性的、三维有限元分析手段,用于深基坑开挖过程中预测围护墙变形和地表沉降值,为了更接近实际,采用了一种新的接触面单元,Desai单元,模拟土与结构的相互作用,三维分析结果表明,基坑内网格密度对于计算结果的精度有较大影响。

关 键 词:深基坑  三维有限元分析  接触面单元  支护结构  围护墙变形  地表沉降  土工计算
文章编号:1006-2467(2001)04-0610-04
修稿时间:2000年1月10日

3-D Finite Element Analysis and Simulation of Deep Excavations
ZHAO Hai-yan,HU ANG Jin-zhi.3-D Finite Element Analysis and Simulation of Deep Excavations[J].Journal of Shanghai Jiaotong University,2001,35(4):610-613.
Authors:ZHAO Hai-yan  HU ANG Jin-zhi
Abstract:Plane strain analysis might give conservative results, because the three-dimensional effects of excavation corners are not considered. In fact, the deep excavation is a three-dimensional procedure. This paper studied the different element grind partitions effect on the wall deformation of the deep excavation. A nonlinear, three-dimensional finite element technique for deep excavation analysis was proposed, which is used for prediction of ground surface settlement in the center section of an excavation. The objective of this paper is to establish a three-dimensional finite element analysis procedure. Moreover, a new kind of contact element called “desai” element was used in this paper.
Keywords:deep excavation  three  dimensional  finite element analysis  contact element
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