摘要
结合三角形、四边形等实体单元的位移插值函数和一维轴力杆单元的刚度矩阵,推导出了一种用于锚杆支护数值模拟的单元列式,可以在地下结构有限元计算中的任何开挖步自由地加设或拆除锚杆,而且,不必在划分初始计算网格时,事先考虑或预留锚杆的结点位置,大大地简化了有限元的前处理或网格划分过程。
A new element form, which is based on the displacement interpolation function of triangular or quadrangular solid element and the stiffness matrix of one-dimensional truss element, is introduced into the analysis on bolt-reinforced underground structure. By using the new developed method, the bolt can be freely added or removed at the arbitrary excavation step in the finite element analysis of underground structure, and the bolt nodes need not be previously considered or arranged in the mesh generation procedure, so that the work of pre-process or mesh division procedure in finite element method can also be much reduced.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2003年第7期1137-1140,共4页
Chinese Journal of Rock Mechanics and Engineering
基金
高等学校博士学科点专项科研基金(1999024719)
国家自然科学基金(40172095)
关键词
锚杆
支护
数值模拟
有限元法
刚度矩阵
地下结构
Computer simulation
Finite element method
Reinforcement
Stiffness matrix
Underground structures
