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Numerical modelling of the cyclic behaviour of rock material in the context of underground pumped storage hydroelectricity
Cerfontaine, Benjamin; Collin, Frédéric; Charlier, Robert
2016In Proceedings of the 1st International Conference on Energy Geotechnics
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Keywords :
Rock mechanics; Cyclic Loading; Fatigue; Pumped storage hydroelectricity
Abstract :
[en] The use of old mines as a reservoir in the context of pumped storage hydroelectricity rises the question of their stability especially upon cyclic loading due to filling and emptying the mines. This paper presents the formulation of a new constitutive law able to represent the inherently cyclic behaviour of rocks at low confinement. The main features of the behaviour evidenced by experiments in the literature depict a progressive degradation and deformation of the material with the number of cycles. A constitutive law based on a boundary surface model is developed. It represents the brittle failure of the material as well as its progressive degradation. It also encompasses a fatigue resistance under which no degradation of the material holds. Parameters are calibrated with respect to laboratory experiments from the literature. A parametric study is carried out to highlight the role of different parameters.
Disciplines :
Civil engineering
Author, co-author :
Cerfontaine, Benjamin ;  Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Collin, Frédéric  ;  Université de Liège > Département ArGEnCo > Géotechnique
Charlier, Robert ;  Université de Liège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Language :
English
Title :
Numerical modelling of the cyclic behaviour of rock material in the context of underground pumped storage hydroelectricity
Publication date :
2016
Event name :
First International Conference on Energy Geotchnics
Event place :
Kiel, Germany
Event date :
Du 29 au 31 août 2016
Audience :
International
Main work title :
Proceedings of the 1st International Conference on Energy Geotechnics
Publisher :
CRC Press
ISBN/EAN :
9781138032996
Pages :
629-636
Peer reviewed :
Peer reviewed
Name of the research project :
SMARTWATER
Funders :
DGRNE - Région wallonne. Direction générale des Ressources naturelles et de l'Environnement [BE]
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