Seismic analysis of gravity dam-reservoir-foundation system using an effective hybrid technique.

Abstract Concrete dams are considered as complex construction systems that play a major role in the context of both economic and strategic utilities. Taking into account reservoir and foundation presence in modeling the dam-reservoir-foundation interaction phenomenon leads to a more realistic evaluation of the total system behavior. The article discusses the dynamic behavior of dam-reservoir-foundation system under seismic loading using Ansys finite element code. Oued Fodda concrete dam, situated at Chlef, in North-West of Algeria, was chosen as a case study. Parametric study was also performed for different ratios between foundation Young's modulus and dam Young's modulus E f /E d (which varies from 0.5 to 4). Added mass approach was used to model the fluid reservoir. The obtained results indicate that when dam Young's modulus and foundation Young's modulus are equal, the foundation soil leads to less displacements in the dam body and decreases the principal stresses as well as shear stresses.

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Seismic Analysis of Dam-Reservoir System Using Direct Coupling

Proceedings of the 5th International Congress on Computational Mechanics and Simulation ◽

10.3850/978-981-09-1139-3_034 ◽

2014 ◽

Author(s):

Kalyan Kumar Mandal ◽

Damodar Maity

Keyword(s):

Seismic Analysis ◽

Direct Coupling ◽

Dam Reservoir ◽

Reservoir System

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Asynchronous seismic analysis of concrete-faced rockfill dams including dam–reservoir interaction

Canadian Journal of Civil Engineering ◽

10.1139/l05-055 ◽

2005 ◽

Vol 32 (5) ◽

pp. 940-947 ◽

Cited By ~ 22

Author(s):

Alemdar Bayraktar ◽

Kemal Haciefendioglu ◽

Murat Muvafik

Keyword(s):

Finite Element ◽

Seismic Analysis ◽

Equations Of Motion ◽

Coupled System ◽

Lagrangian Approach ◽

Element Formulation ◽

Dam Reservoir ◽

Torul Dam ◽

Displacement Based ◽

Isoparametric Finite Elements

Seismic response of concrete-faced rockfill (CFR) dams subjected to asynchronous base excitation is determined by considering dam–reservoir interaction. The equations of motion of the coupled system are obtained using the Lagrangian approach, and the surface sloshing motion is included in the finite element formulation. Torul dam constructed in the city, Gumushane, Turkey, is selected as a numerical example, and its material properties are considered in the analysis. The dam–reservoir interaction system is modelled using the Lagrangian (displacement-based) fluid and solid-quadrilateral-isoparametric finite elements. The east–west component of Erzincan earthquake, which occurred on 13 March 1992, recorded near the region of the dam is used as a ground motion. Propagation velocities of the seismic wave are chosen as 1000 m/s, 3000 m/s, and infinite. Stresses are calculated for empty and full reservoir cases and compared with each other.Key words: concrete-faced rockfill dam, Lagrangian approach, dam–reservoir interaction, finite element method, earthquake.

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