Seismic analysis of Fractured Koyna Concrete Gravity Dam

Abstract Seismic analysis of a fractured dam is generally complex problem. This paper presents an earthquake behavior investigation concrete gravity considering dam-reservoir--foundation rock interaction. The Koyna profile, located in India, adopted this study. nonlinear finite element analyses are conducted taking into account empty and full reservoir cases, to exhibit the hydrodynamic e ect water on response. pressure modeled by fluid elements based Lagrangian approach. Transient take material connection nonlinearity. Drucker-Prager model employed for foundation rock. structural crack between top bottom blocks presented surface-to-surface contact Coulomb’s friction law order simulate joints deformation blocks. distribution horizontal displacements principal stresses along height investigated cases.The failure processes two potential modes cracked dam, i.e, separation sliding block during earthquake, examined.