Ph.D. Tezi Görüntüleme

      In this thesis, reliability analyses of concrete-faced rockfill dams under static and earthquake are performed considering dam-foundation-reservoir interaction. The effect of reservoir water on dam is considered using fluid finite elements based on the Lagrangian approach. Welded and friction contact are considered in various joints. One dimensional surface-to-surface contact elements obeying Coulomb’s friction law are used for frictional contacts. Earthquake response of the dam to deconvolved ground acceleration record is obtained. Non-reflecting boundary conditions are defined by viscous dampers. Drucker-Prager model is used for concrete and multi-linear kinematic hardening model is used for rockfill in the materially nonlinear analyses. Geometrically nonlinearity is also considered.

      This thesis is composed of four chapters. In the first chapter, literature researches, used methods and formulations are given. In the second chapter, numerical model of the concrete-faced rockfill dam is given and the reliability analysis algorithm is explained. In the third chapter, initially, earthquake response of the dam is examined and then reliability of the dam under static and earthquake loads is studied. In the last chapter, it is deducted from the study that reservoir water decreases the reliability of the concete slab and to consider friction in the joints increases the reliability of the concete slab and in addition to this the proposals for further studies are given. This chapter is followed by the references.