期刊名称：Journal of Theoretical and Applied Information Technology
印刷版ISSN：1992-8645
电子版ISSN：1817-3195
出版年度：2013
卷号：47
期号：2
页码：687-691
出版社：Journal of Theoretical and Applied
摘要：Analysis and calculation in underground caverns excavation is absolutely a complex three-dimensional (3D) problem, but a two-dimensional (2D) model is usually applied to substitute for the 3D model because of the limit of computer speed and the complexity of the FEM 3D grids. This paper discusses the difference of this two models on the basis of Drucker-Prager yield criteria and the reason why the plastic region from 3D finite element model is smaller than that from 2D model is analyzed in theory. At last, comparative analysis based on the classical FEM software ABAQUS is constructed. The conclusion intuitively shows that the plastic region of 2D model is bigger than that of 3D model, so it is suggested that the 3D finite element model should be built as far as possible in order to describe the plastic region accurately.
关键词：Underground Caverns; Plane Strain; Three-dimensional Model; Plastic Region; Model Updating
