水科学与水工程2009，Vol.2Issue(3)：71-77,7.DOI:10.3882/j.issn.1674-2370.2009.03.007
Surrounding rock deformation analysis of underground caverns with multi-body finite element method
Surrounding rock deformation analysis of underground caverns with multi-body finite element method
Wan-jin LIANG 1Chao SU 1Fei WANG 1Xiao-jun TANG1
作者信息
- 1. College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,P.R.China
- 折叠
摘要
Abstract
Discontinuous deformation problems are common in rock engineering.Numerical analysis methods based on system models of the discrete body can better solve these problems.One of the most effective solutions is discontinuous deformation analysis (DDA) method,but the DDA method brings about rock embedding problems when it uses the strain assumption in elastic deformation and adopts virtual springs to simulate the contact problems.The multi-body finite element method (FEM)proposed in this paper can solve the problems of contact and deformation of blocks very well because it integrates the FEM and multi-body system dynamics theory.It is therefore a complete method for solving discontinuous deformation problems through balance equations of the contact surface and for simulating the displacement of whole blocks.In this study,this method was successfully used for deformation analysis of underground caverns in stratified rock.The simulation results indicate that the multi-body FEM can show contact forces and the stress states on contact surfaces better than DDA,and that the results calculated with the multi-body FEM are more consistent with engineering practice than those calculated with DDA method.关键词
multi-body finite element method/discontinuous deformation/surrounding rock deformation/elastic contact/coordination displacementKey words
multi-body finite element method/discontinuous deformation/surrounding rock deformation/elastic contact/coordination displacement分类
建筑与水利引用本文复制引用
Wan-jin LIANG,Chao SU,Fei WANG,Xiao-jun TANG..Surrounding rock deformation analysis of underground caverns with multi-body finite element method[J].水科学与水工程,2009,2(3):71-77,7.
