ABSTRACT
This chapter examines an example that includes gravity dam stability analysis by using the strength reduction finite element method, compared with the analytical results of the limit equilibrium approach proposed by S. K. Sarma. Extensions of plastic zones along the specified seam, as well as the development of new yield zone in the intact rock, can be clearly visualized as the reduction factor F increases, until a failure criterion, either defined as divergence of the numerical iteration, or rapid increase of displacement at some characteristic points, is reached. The chapter shows that strength reduction method is feasible in gravity dam stability analysis along specified or potential slip surfaces. It discusses the feasibility of strength reduction method in the deep anti-sliding stability of gravity dams. From the reduction factor of distribution of plastic zone, the relationship can be seen between the increase in the reduction factor and development process of the plastic area.
