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Original Articles

Study on a semi-probabilistic method for embankment hydraulic works

Application to sliding mechanism

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Pages 669-691 | Published online: 04 Oct 2011
 

ABSTRACT

Both in France and at the global level, hydraulic works have remained excluded from semi-probabilistic regulations. As far as embankment hydraulic works are more specifically concerned, there are no formal rules for their design. In this context, the French Commitee on Large Dams initiated a research project to define a semi-probabilistic limit-state method for the design of embankment hydraulic works. This paper accounts for the work done over two years. It determines the position of embankment hydraulic works in relation to Eurocode 7. It briefly outlines the suggested semi-probabilistic limit-state method and focuses on the sliding limit-state. Applying the method to a pseudo-homogenous dam helps comparing the standard deterministic practice, the Eurocode 7-based approach and the developed semi-probabilistic method.

RÉSUMÉ

En France comme à l'international, les ouvrages hydrauliques sont restés à l'écart des règlements semi-probabilistes. Concernant les ouvrages hydrauliques en remblai, il n'existe pas de cadre formel pour leur justification. Dans ce contexte, le Comité français des barrages et réservoirs a engagé un projet de recherche visant à définir une méthode semi-probabiliste aux états-limites pour la justification des ouvrages hydrauliques en remblai. Cet article rend compte du travail mené sur deux années. Il établit la position des ouvrages hydrauliques en remblai vis-à-vis de l'Eurocode 7. Il décline succinctement la méthode semi-probabiliste aux états-limites proposée et il se focalise sur l'état-limite de glissement. Une application à un barrage pseudo-homogène permet de comparer la pratique déterministe classique, l'approche par l'Eurocode 7 et la méthode semi-probabiliste développée.

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