Since 1963
ARTICLE
Impact of material nonlinearity of dam-foundation rock system on seismic performance of concrete gravity dams
| 1 | Laboratory of Materials and Mechanics of Structures (LMMS), Department of Civil Engineering, University of Msila,
Algeria |
| 2 | Laboratory of Hydraulic Developments and Environment LAHE, University of Biskra, Algeria |
| 3 | Department of Civil Engineering and Public Works, Faculty of Technology, University Belhadj Bouchaib, Ain Temouchent,
Algeria |
| 4 | Consultant, Antony, France |
CORRESPONDING AUTHOR
Submission date: 2022-08-07
Final revision date: 2022-10-25
Acceptance date: 2022-10-26
Online publication date: 2022-12-29
Publication date: 2023-01-30
Journal of Theoretical and Applied Mechanics 2023;61(1):49–63
KEYWORDS
concrete gravity damdynamic dam-foundation rock interactionDrucker-Pragermodelcrackingnonlinear earthquake analysisfinite element method
TOPICS
solid mechanicsfluid mechanicsfluid structures intractionsstability and vibrations systemsmechanics of materialsdynamics of machines, vehicles and flying structurescomputational mechanicsstructures mechanicscoupled fields mechanics
ABSTRACT
This paper shows the impact of material nonlinearity of a dam-foundation rock system on
seismic performance of Oued Fodda concrete gravity dam, located at northwestern side of
Algeria. For the purpose, a three-dimensional dam-foundation rock system finite element
model is employed in analyses. The hydrodynamic interaction between reservoir water and
dam-foundation system is implicitly taken into consideration by the Westergaard approach
using surface finite elements added to dam-fluid and foundation-fluid interfaces. The concrete
material model is used to present the cracking of dam concrete under a seismic load the using
smeared crack approach based on the Willam and Warnke failure criterion. The materially
nonlinear analysis for both dam concrete and foundation rock is performed using Drucker-
-Prager model. According to numerical results, tensile stresses and maximum strains reduce
significantly in the materially nonlinear model. In addition, the cracking areas in the dam
decrease also when material nonlinearity characteristics of the dam-foundation rock system
is considered in analyses.
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