高拱坝承载能力研究

高拱坝的破坏机理及最终承载力是高拱坝设计中的关键问题.总结了近年来高拱坝承载能力的分析成果,提出研究高拱坝的承载能力较之中低拱坝具有更重要的意义,分析了弹塑性有限元法和塑性极限分析法共同用于高拱坝承载能力计算的合理性,讨论了超载方式对承载能力的影响,分析了拱坝发生破坏的判别依据以及建议根据拱坝对应的弹性状态、开裂状态和极限状态分别求其安全度.

Research on load bearing capacity of high arch dam

It is essential for the design of high arch dams to research problems of destruction process and limit load bearing capacity of the dams .In this paper, the analytical results of several high arch dams are summarized; then an opinion, that it is more significant to research load bearing capacity of high arch dams than for medium height dams, is put forward. And the rationality, that we research the high arch dam through elastoplastic finite element and plastic limit method at the same time, is analyzed. Moreover, the influence of different overloading methods on load bearing capacity and the criterion of failure state are discussed. At last, an idea that the stable degree of safety should be defined respectively according to elastic state, crack state and limit state, is suggested.