白莲崖拱坝坝肩稳定性有限元分析

系统介绍了非线性有限单元解决拱坝坝肩稳定分析方法的原理,分析了岩体和结构面的单元模式,阐明了岩体的屈服条件和岩体在各种受力状态下的本构方程,详细介绍了运用荷载增量迭代法求解岩体应力应变的方法,并根据应力应变计算成果,以岩体内任一断面的抗滑稳定安全系数Fs作为目标函数,通过优化计算,求得最小安全系数对应的最不利的可能滑动面,从而解决拱坝坝肩稳定问题。本文通过此方法对白莲崖拱坝坝肩稳定性进行计算,并对其坝肩稳定给出综合评价。

Nonlinear finite element analysis on the stability of Bailianya arch dam adutment

This thesis introduces the principle of nonlinear finite element methed about stability of arch dam adutment, analizes the rock's and structure's element, clarifies the yield condition of the rock and the rock constitutive eruation in varied foce state, detailed introduces the calculation methed of rock stress and strain by use of repeated load increment. Accoding to the of result stress and strain, uses the factor of safety against sliding [Fs] in any rock section as objective function, the possible sliding section cooresponding with min. The factor of safety is found after improvement computation in order to slove the stability of arch dam adutment. It gives the comprehensive appraise on the stability of Bailianya arch dam adutment according to its nonlinear finite element's result.