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Open AccessFeature PaperArticle

Hydro-Thermo-Mechanical Analysis of an Existing Gravity Dam Undergoing Alkali–Silica Reaction

Department of Civil and Environmental Engineering, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy
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Infrastructures 2019, 4(3), 55; https://doi.org/10.3390/infrastructures4030055
Received: 11 July 2019 / Revised: 9 August 2019 / Accepted: 15 August 2019 / Published: 22 August 2019
(This article belongs to the Special Issue Advances in Dam Engineering)
The alkali–silica reaction is a chemical phenomenon that, by inducing expansion and the formation of cracks in concrete, can have a severe impact on the safety and functioning of existing concrete dams. Starting from a phenomenological two-phase isotropic damage model describing the degradation of concrete, the effects of alkali-silica reaction in an existing concrete gravity dam are evaluated and compared with real monitoring data. Considering the real temperature and humidity variations, the influence of both temperature and humidity are considered through two uncoupled diffusion analyses: a heat diffusion analysis and a moisture diffusion analysis. The numerical analyses performed with the two-phase damage model allow for prediction of the structural behaviour, both in terms of reaction extent and increase of crest displacements. The crest displacements are compared with the real monitoring data, where reasonably good agreement is obtained. View Full-Text
Keywords: alkali-silica reaction; damage; existing concrete dam; finite element analysis; temperature; saturation degree alkali-silica reaction; damage; existing concrete dam; finite element analysis; temperature; saturation degree
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MDPI and ACS Style

Colombo, M.; Comi, C. Hydro-Thermo-Mechanical Analysis of an Existing Gravity Dam Undergoing Alkali–Silica Reaction. Infrastructures 2019, 4, 55.

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