Effect of Galleries on Two Dimensional Behavior of Roller Compacted Concrete Dams

Effect of galleries on the linear and nonlinear earthquake response of roller compacted concrete (RCC) dams are investigated by submodeling technique in this paper. For this purpose, Çine RCC dam constructed in Aydın, Turkey, is selected as an application. The two dimensional finite element model of Çine RCC dam is obtained using ANSYS software. The unfavorable section of the dam is selected for two dimensional model. The material and soil mechanical properties were obtained from the experimental data of the dam. The Drucker-Prager material model is considered in the materially nonlinear time history analyses for concrete and foundation rock. The two dimensional finite element model includes dam-foundation-reservoir interaction. The reservoir water are modeled with the two dimensional fluid finite elements based on the Lagrangian approach. The friction is defined between dam and foundation interfaces using contact-target element pairs. Galleries are considered in the body of the dam and the mesh is refined around the galleries considering submodeling technique. The finite element model of the dam is calibrated according to the data coming from the dam monitoring system. Empty and full reservoir conditions are considered in linear and non-linear analyses. Cine earthquake records were used in dynamic analysis during 181.52 seconds. The displacements and stresses obtained from the linear and non-linear analyses with and without galleries are compared with each other.