【摘要】 本文讨论非线性有限元法在拱坝分析中的应用。用弹塑性—断裂模型描述拱坝与基岩的力学性质,可以求得拱坝—岩基交界面的开裂区范围、拱坝变形的变化和拱坝的应力重分布情况。典型算例表明,考虑拱坝—岩基交界面的开裂后,坝踵处高铅直拉应力消失,而铅直压应力仅略有增加。从而可知,在拱坝设计中推广非线性分析方案可以导致更经济的设计和更简单的拱坝体型。更多还原

【Abstract】 In this paper, the application of nonlinear finite element method in analysis of arch dam and its foundation is discussed. By using an elastoplastic-fracture model describing the mechanical properties of concrete and foundation rock,the extent of crack zone in the dam-foundation interface,the variation in dam deformation and the stress redistribution of arch dam can be computed. A typical example shows that in considering the cracks developed in the interface the high vertical tensile stress of dam heel disappears and the vertical compression stress increases slightly. It is concluded that to extend the nonlinear analysis scheme in the design of arch dam can lead to more economic design and more simple profile of dam.更多还原