摘要
本文采用有限无和边界元的耦合方法探讨了开洞地基与上部结构的相互作用.开洞地基用边界元法,上部结构用有限元法,以两部分交接面上的位移协调和力的平衡条件作为耦合分析的条件,对二维弹性问题在电子计算机SIEMENS7570C上编制了通用程序.文中计算了两个工程实例,并与该两工程按常规法计算的结果,以及现场观测情况作了比较,表明在较软弱的开洞地基中考虑相互作用影响的必要性.
In this paper,the interaction between foundation withcavern and frame structure is studied by the coupling methods of BEMand FEM.On the interface between the foundation and structure,thecoupling analysis needs to satisfy both the condition of displacementcompatibility and force equilibrum.A calculating program for two-dim-ensional problem is worked out in the computer,SIEMENS 7570C.Twoengineering examples are calculated and the results are compared withthose obtained by the comventional simplified method and with the observedresults from the engieering structures.It indicates that it is necessaryfor the weak rock foundation with shallow cavern,in the buried depth,to take the interaction into account.
关键词
开洞地基
框架
有限元
边界元
finite element method
boundary element method
foundation with cavern
coupling analysis
frame structure
