Sharif University of Technology Scientia Iranica 1026-3098 26 1 2019 02 01 Domain reduction method for seismic analysis of dam-foundation-fault system 145 156 20696 10.24200/sci.2018.20696 EN H. Mohammadnezhad Department of Civil Engineering, Sharif University of Technology, Tehran, P.O. Box 11155-9313, Iran H. Zafarani International Institute of Earthquake Engineering and Seismology (IIEES), Tehran, P.O. Box 19395/3913, Iran M. Ghaemian Department of Civil Engineering, Sharif University of Technology, Tehran, P.O. Box 11155-9313, Iran Journal Article 2016 06 13 Numerical simulation of dam-foundation-fault system, considering the earthquake source, propagation path, and local site eects, was carried out for realistic and reasonable seismic safety analysis of concrete dams. The Domain Reduction Method (DRM) was used for seismic analysis of Dam-Foundation-Fault (DFF) system, in which a modular two-step methodology for reducing the computational costs in large domain analysis was introduced. In this method, seismic excitation is directly applied to the computational domain such that assigning articial boundary to the nite element models is more comfortable. In order to verify the  implementation of the DRM in Finite Element Method (FEM), a simple 2D half-space under the Ricker wavelet excitation was examined. Then, to investigate the DRM as an appropriate method in seismic analysis of DFF system, the Koyna concrete gravity dam was modeled. Comparing the obtained results by using<br />both the DRM in a small domain and the traditional approach in the large domain containing the source shows the eciency of the DRM in terms of computational costs, such as running time and number of elements for seismic analysis of concrete gravity dams. https://scientiairanica.sharif.edu/article_20696_87d40a027fdb8ed63ff042387a8d81a3.pdf