摘要
在考虑了土与结构的相互作用的基础上,采用耦合模型来模拟土体的分层性、非线性以及土体和钢筋混凝土之间的滑移、拉裂、嵌入以及土体的半无限边界条件。文中首先阐述了接触元建立的方法以及单元刚度矩阵的积分方法;由于无限远处的土场位移、地震作用力皆为零,计算中对该单元刚度矩阵的形式不同于四节点等参元,文中推导了平行无限元的单元刚度矩阵方,并介绍了无限元单元刚度矩阵组装原理。通过对一双洞口矩形截面隧道的地震反应进行分析,为地下结构的抗震设计提供参考意见。
Based on the principle of structure-soil interaction, the coupling model was used to simulate the layer structure, nonlinear stress-strain property and status of slipping, tension cracking between soil and reinforced concrete wall. Firstly,the paper introduces the principle of instituting contact interface element and the format of integral method for element stiffness matrix;secondly,because of the zero of displacement and load of soil in the infinite boundary, the unique shape of element stiffness matrix is obtained for coupling the three different elements. The test of double hole with rectangle section shows the expected result for the coupling model,and some advice is brought forward for similar structure.
出处
《地下空间与工程学报》
CSCD
2005年第3期363-366,共4页
Chinese Journal of Underground Space and Engineering
关键词
耦合模型
有限元
接触元
无限元
coupling model
finite element
contact interface element
infinite element
