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Seismic analysis of reservoir-gravity dam-massed layered foundation system due to vertically propagating earthquake

Sotoudeh, P ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.soildyn.2018.09.041
  3. Publisher: Elsevier Ltd , 2019
  4. Abstract:
  5. Seismic analysis of complex structures such as concrete dams has been the subject of numerous studies. One of the challenges in seismic analysis of such systems is proper modelling of massed foundation. Since concrete dams’ foundations are usually layered, this makes the homogenous half-space assumption relatively unrealistic. In this paper, the effects of massed layered foundation on seismic response of concrete gravity dams in dam-reservoir-foundation systems are investigated. Seismic finite element analysis of the system carried out using domain reduction method. This approach is compared with another available method named, free-field column. First set of analysis considers the effect of modular ratio between layers on seismic response of the gravity dam. Second set of analyses investigate the effects of layers’ geometry, location and orientation on obtained responses. Results highlight the considerable effects of massed layer foundation assumption against its homogenous counterpart. Besides, results show that layer properties dictate how severely they can affect the dynamic responses of the dam. © 2018 Elsevier Ltd
  6. Keywords:
  7. Concrete dam-reservoir-foundation interaction ; Massed layered foundation ; Concrete dams ; Concretes ; Earthquakes ; Foundations ; Geometry ; Gravity dams ; Seismic response ; Underwater foundations ; Wave propagation ; Complex structure ; Concrete gravity dams ; Dam reservoirs ; Dam-reservoir-foundation systems ; Half spaces ; Layered foundation ; Reduction method ; Seismic analysis ; Reservoirs (water) ; Concrete structure ; Earthquake engineering ; Foundation ; Gravity dam ; Reservoir ; Seismic response
  8. Source: Soil Dynamics and Earthquake Engineering ; Volume 116 , 2019 , Pages 174-184 ; 02677261 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S0267726118304883