以下为句子列表：
英文: Based on mechanical behavior of surrounding rock and its failure mechanism, introducing the theory of damage mechanics, this paper establishes a 3D nonlinear elastoplastic damage FEM model under unloading conditions, which is used to study the stability o
中文: 笔者从隧道围岩的力学性能及破坏机理出发，引入损伤力学理论，建立三维非线性脆弹塑性损伤有限元模型，研究在加、卸载条件作用下隧道施工全过程的围岩稳定性，为实际工程提供理论的指导作用。
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英文: Based on the design of Hanpingzui rockfill dam with concrete facing slab, the stresses and deformations of the dam body and impervious system are calculated by using the elastoplastic plane finite element method.
中文: 摘要根据汉坪咀混凝土面板堆石坝的工程设计，用弹塑性平面有限元法，计算了堆石坝坝体、防渗体系的应力和变形。
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英文: Mixed variational inequalities are more general than classical variational inequalities and have rather practical applications in elastoplastic problems.
中文: 混合变分不等式在弹性塑料学领域有实际应用，而且形式上比经典的变分不等式更一般。
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英文: THE VISCOELASTOPLASTIC BOUNDARY ELEMENT ANALYSIS FOR THE UNDERGROUND ROCK CAVERNS
中文: 地下岩石洞室粘弹塑性边界元分析
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英文: The elastoplastic analysis of viscoelastic structure is carried with modern control theory when structure is simulated by three fold time stiffness retrograde model and viscoelastic dampers is simulated by Kelvin model.
中文: 钢筋混凝土结构的恢复力模型简化为三线型刚度退化模型,粘弹性阻尼器采用Kelvin模型,应用现代现代控制理论对粘弹性阻尼结构进行弹塑性时程分析,分析粘弹性材料参数和支撑刚度对粘弹性阻尼器耗能性能的影响。
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