摘要
文章在考虑了土体和结构的动相互作用基础上,采用耦合模型对浅埋隧道进行抗震分析。该模型中不同的单元可以模拟结构不同的部位:有限元可以模拟土体非线性本构关系、土体的分成性;接触面单元可以模拟土体和钢筋混凝土之间的滑移、拉裂、嵌入等现象;无限元可以模拟无限远处土体位移为零的特征。文中首先阐述了接触元的原理以及单元刚度矩阵的积分形式;然后推导了平行无限元的单元刚度矩阵。通过对某双洞矩形截面隧道的地震反应分析,为同类型工程的抗震设计提供指导性意见。
Based on the principle of soil-structure interaction, the coupled model is used to analyze the seismic responses of a shallow embedded tunnel. Different parts of the structure are simulated by different elements. Finite elements can imitate the nonlinear constitutive relation and the layered characteristics of soils. Contact interface elements can be used to simulate the slipping and tension crack between soil and reinforced concrete wall. Infinite elements can be used to simulate the displacements far away from the structure. The paper firstly describes the theory of contact interface elements and introduces the integral form of element stiffness matrix, then puts forward the matrix of an infinite element. Seismic analysis is carried out for a shallow double cell rectangular tunnel, the results obtained can be referred to by similar projects.
出处
《现代隧道技术》
EI
北大核心
2005年第3期5-10,共6页
Modern Tunnelling Technology
关键词
耦合模型
相互作用
有限元
接触元
无限元
Coupled model
Interaction
Finite element
Contact interface element
Infinite element
