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Seismic demands within gravity dams and appurtenant structures including reservoir and rock foundation effects

Siamak Ohadi

Master's thesis (2020)

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Abstract

This research aims at investigating rock foundation effects on the seismic demands with concrete gravity dams and their appurtenant structures using finite element analyses. For this purpose, horizontal and vertical seismic components are applied to dam-reservoir-foundation systems to evaluate the effects of soil-structure interaction on both horizontal and vertical acceleration floor spectra, representing maximum acceleration response experienced by dam appurtenant structures.The dam-reservoir-foundation system is modelled using bidimensional (2D) solid finite elements, including fluid-structure interaction special elements at the dam-reservoir interface, and absorbing boundary conditions, i.e. viscous Lysmer-Kuhlemeyer dampers, at the bottom and lateral boundaries of the dam foundation domain. The mass of the dam foundation is included in the finite element models.

Résumé

Ce mémoire vise à étudier les effets des fondations sur les sollicitations sismiques au sein des barrages poids et des structures connexes à l'aide d'analyses par éléments finis. À cette fin, des composantes sismiques horizontales et verticales sont appliqués aux systèmes barrage-réservoir-fondation pour évaluer les effets de l'interaction sol-structure sur les spectres de plancher des accélérations horizontale et verticale, représentant les accélérations maximales des structures annexes au barrage. Le système barrage-réservoir-fondation est modélisé en utilisant des éléments finis solides bidimensionnels (2D), incluant des éléments spéciaux assurant l'interaction fluide-structure à l'interface barrage-réservoir, et des conditions aux limites absorbantes, i.e. amortisseurs visqueux de Lysmer-Kuhlemeyer, aux limites inférieures et latérales du domaine modélisé de la fondation du barrage.

Department: Department of Civil, Geological and Mining Engineering
Program: Génies civil, géologique et des mines
Academic/Research Directors: Najib Bouaanani
PolyPublie URL: https://publications.polymtl.ca/4181/
Institution: Polytechnique Montréal
Date Deposited: 25 Aug 2020 12:06
Last Modified: 21 Apr 2023 19:51
Cite in APA 7: Ohadi, S. (2020). Seismic demands within gravity dams and appurtenant structures including reservoir and rock foundation effects [Master's thesis, Polytechnique Montréal]. PolyPublie. https://publications.polymtl.ca/4181/

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