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Published in: Innovative Infrastructure Solutions 6/2022

01-12-2022 | Technical Paper

Influence of earthquake excitations on concrete gravity dams founded on homogeneous and layered foundation

Authors: Aniket R. Tidke, Shrabony Adhikary, Ehsan Noroozinejad Farsangi

Published in: Innovative Infrastructure Solutions | Issue 6/2022

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Abstract

The present paper investigates the response of dams with homogeneous and layered foundation systems under different earthquake excitations. For this purpose, the finite element analyses are conducted for three cases: Case 1—Effect of horizontal (H) component on a dam-homogenous foundation system, Case 2—Effect of combination of horizontal and vertical (H + V) component on a dam-homogenous foundation system and Case 3—Effect of combination of horizontal and vertical (H + V) component on the dam-layered foundation system. Tensile crack failure in the dam is captured by providing the nonlinear behavior using the concrete damaged plasticity model. Nonlinear material behavior is given to the underlying foundation using the Mohr–Coulomb failure model. The one-way plane strain infinite elements are used for the earthquake wave propagation through the vertical and bottom faces of the foundation domain. Eleven seismic ground motions that correspond with the Conditional Mean Spectrum are adopted for earthquake analyses. Results show that the (H + V) component when compared to the (H) component of seismic ground motions, has considerable influence on the dissipation energy and crest acceleration response; however, it has a marginal impact on the displacement and stress response of the dam. As compared to a homogeneous foundation, a layered foundation greatly affects the overall earthquake response of the dam since a substantial amplification of earthquake waves is seen through it. It is observed that the tensile crack failure in the dam is significantly increased due to the (H + V) component of seismic ground motions and is barely affected by the layered foundation.

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Metadata
Title
Influence of earthquake excitations on concrete gravity dams founded on homogeneous and layered foundation
Authors
Aniket R. Tidke
Shrabony Adhikary
Ehsan Noroozinejad Farsangi
Publication date
01-12-2022
Publisher
Springer International Publishing
Published in
Innovative Infrastructure Solutions / Issue 6/2022
Print ISSN: 2364-4176
Electronic ISSN: 2364-4184
DOI
https://doi.org/10.1007/s41062-022-00940-7

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