高拱坝坝肩抗震稳定分析是建于地震高烈度区的高拱坝抗震设计的关键课题之一 .本文将传统的用于块体稳定分析的刚体极限平衡方法和有限元计算分析相结合 ,求解拱坝坝肩抗震稳定问题 .具体作法是 :有限元网格剖分时 ,尽可能布置有限元节点于拱坝坝肩的可能滑动块体表面 .完成有限元静动力分析后 ,将块体表面各节点的静动应力进行积分 ,求出块体拱推力、作用于块体上的地震荷载等 ,然后由刚体极限平衡法求拱坝坝肩抗震稳定安全系数 .上述方法的特点是能充分利用有限元和刚体极限平衡两种分析方法的优点 ,可以提供安全系数时程曲线 ,安全系数的定义与现行规范一致 ,易为设计人员所接受 Seismic stability analysis of high arch dam abutment is one of the key issues in the seismic design of high arch dam built in high seismic intensity area.This paper combines the traditional rigid limit equilibrium method and finite element analysis for block stability analysis, In order to solve the problem of seismic stability of arch dam abutment, the concrete method is as follows: When the finite element mesh is divided, the finite element node is arranged on the possible sliding block surface of arch dam abutment.After completing the finite element static and dynamic analysis, The static and dynamic stress of each node of the surface is integrated to obtain the thrust of block arch and the seismic load acting on the block, and then the stability and safety factor of the arch dam abutment is obtained by rigid body limit equilibrium method. The above method is characterized by sufficient Utilizing the advantages of both finite element and rigid body limit equalization methods, the safety factor time history curve can be provided. The definition of the safety factor is consistent with the current standard and is easy for designers to accept