用于重力坝抗滑稳定分析的分项系数有限元方法

针对有限元法缺乏配套设计标准的问题,本文提出一种新的应用于重力坝抗滑稳定的有限元计算方法———分项系数有限元法,并导出其相应的稳定判断准则。该方法将影响坝基稳定的结构基本变量因素经过分项系数的处理再进入非线性计算,以达到极限承载状态时的强度储备系数来表征大坝安全度。通过文中的计算实例,验证了该方法的可行性和适用性。

Partial coefficient FEM for gravity dam anti-sliding stability analysis

The application of finite element method(FEM) is limited with lacking of design criterion.A new approach based on partial coefficient is proposed for the gravity dam stability analysis and the corresponding stability check formula is derived in this paper.The structure independent variables should be counted in each partial coefficient influence before computation.The dam final stability index is defined by the strength reserve coefficient in its limit equilibrium state.The computation example results show that the approach of partial coefficient FEM is more reasonable and convenient than the conventional one.