Loading...

Domain reduction method for seismic analysis of dam-foundation-fault system

Mohammadnezhad, H ; Sharif University of Technology | 2019

576 Viewed
  1. Type of Document: Article
  2. DOI: 10.24200/sci.2018.20696
  3. Publisher: Sharif University of Technology , 2019
  4. Abstract:
  5. Numerical simulation of dam-foundation-fault system, considering the earthquake source, propagation path, and local site effects, 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 artificial boundary to the finite 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 both the DRM in a small domain and the traditional approach in the large domain containing the source shows the efficiency of the DRM in terms of computational costs, such as running time and number of elements for seismic analysis of concrete gravity dams
  6. Keywords:
  7. Dam-foundation-fault system ; Domain reduction method ; Numerical method ; Seismic wave propagation ; Concrete dams ; Concretes ; Cost benefit analysis ; Earthquakes ; Foundations ; Geometry ; Gravity dams ; Numerical methods ; Seismic waves ; Wave propagation ; Artificial boundaries ; Computational costs ; Computational domains ; Concrete gravity dams ; Fault system ; Reduction method ; Seismic excitations ; Traditional approaches ; Finite element method ; Comparative study ; Concrete ; Dam ; Fault ; Foundation ; Methodology ; Seismic wave ; Seismicity ; Wavelet analysis ; India ; Koyna ; Maharashtra
  8. Source: Scientia Iranica ; Volume 26, Issue 1A , 2019 , Pages 145-156 ; 10263098 (ISSN)
  9. URL: http://scientiairanica.sharif.edu/article_20696.html