开挖处理的虚拟单元广义初应力法及应用

The Method of Virtual Element and Initial Stress in Broad Sense for Geotechnical Excavation FEM Analysis and Its Application

结合岩土工程有限元分析软件开发的需要,提出单元开挖问题处理的虚拟单元广义初应力法,并基于该方法设计分步开挖问题数值分析算法,应用该方法编制的程序对一分步开挖问题进行了数值模拟分析,提出了虚拟单元广义初应力方法在岩土工程有限元分析软件设计及编程等方面的特点。

In this paper, the method of virtual element and generalized initial stress is presented for developing software on FEM analysis of geotechnieal excavation. Based on the method, the algorithm for geotechnical excavation FEM analysis is also presented. On this basis, the software for FEM analysis and numerical simulation is developed. As an illustrative example, a question on stagewise excavation is analysed using the software, and the peculiarities of the method for the software＇s design and developing are all given.