摘要
在工程实践中 ,对于深基坑开控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 。
Plane strain analysis might give conservative results, because the three-dimensional effect 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.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2001年第4期610-613,共4页
Journal of Shanghai Jiaotong University
基金
上海建设基金资助项目
