Stability Analysis of Deep Anti-sliding of Gravity Dam Based on Partitioned Rigid Body and Interface Element Method
The dam body and dam foundation system are divided into three parts:deformable sliding interface,rigid sliding block,and rigid foundation.A partitioned rigid body interface element analysis method was established based on the stress-deformation coordination of the sliding interface and the static equilibrium of partitioned rigid bodies.The un-known variables in this method only include the deformation of the partitioned rigid bodies and the contact forces on the sliding interface.Combined with an iterative solution based on the limit equilibrium equation,it can quickly and accurately solve the deep-seated anti-sliding stability safety factor of gravity dams.For unknown conditions of local sliding surfaces,the most critical sliding surface can be determined through a search.This method can simultaneously satisfy the kinematic admissibility condition of upper bound limit analysis and the stress admissibility condition of lower bound limit analysis,overcoming the limitations of existing code-based analysis methods that rely on assumptions to meet the conditions of low-er bound limit analysis.The accuracy of this method is demonstrated through an example of deep-seated anti-sliding sta-bility analysis of a gravity dam.
gravity damdeep slidingpartitioned rigid bodyinterface elementiterative solution for safety factor
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