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本文分为三大部份:第一部份,从几何、材料和应力状态三方面特性的模拟建立了反映多介质、具有软弱面岩体结构和弹塑性断裂材料的力学行为的分区混合有限元模型(它是由位移元、杂交混合元、广义夹层元和无限元组成的),并提出了非线性混合元的分析方法;第二部份是在上述仿真模型的基础上,从应力、变形和能量三个角度提出了新的稳定分析判据,并导出了相应的系统分析方法;文中的最后部份,是以某大型高拱坝坝肩稳定分析的数值实例说明本文理论的应用及获得结果的合理性。
This article is divided into three parts: Part I: The partitioned hybrid finite element method is used to simulate the mechanical behavior of multi-medium, weak-face rock mass structure and elasto-plastic fracture material from the simulation of three aspects of geometry, material and stress state. The model (which consists of displacement elements, hybrid elements, generalized mezzanine elements, and infinite elements), and proposes a nonlinear hybrid element analysis method; the second part is based on the above simulation model, from the stress, deformation From the three perspectives of energy and energy, a new stability analysis criterion was proposed and a corresponding system analysis method was derived. The final part of the paper is a numerical example of the stability analysis of a large high arch dam abutment to illustrate the application of this theory and its The rationality of the results.