Long-term behaviour of a dam affected by alkali–silica reaction studied by a multi-scale model. (15th February 2023)

• Record Type: Journal Article
• Authors: Gallyamov, E.R.; Corrado, M.; Fauriel, J.; Molinari, J.-F.
• Is Part Of: Engineering structures. Volume 277(2023)
• Publication Date: 2023-02-15
• Subjects: Alkali–silica reaction -- FE2 -- Damage model -- High performance computing; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2022.115427
• Languages: English
• ISSNs: 0141-0296

Abstract

Abstract: This paper aims to employ a 2D thermo-mechanical multi-scale ASR model for the analysis of a concrete gravity dam in Western Switzerland. Simulation results are compared to the field measurements and observations. Analysis of the results reveals negligible effect of temperature variation on the ASR advancement. The difference in length between the upstream and the downstream faces is identified as the main source for the upstream drift at the level of the crest. Study of the structural effects reveals ASR-related expansion anisotropy and cracks alignment being more pronounced along the upstream part and the foundation. If the former is explained by the transmission of the self-weight, the latter is attributed to the constraining effect of the underlying rock. Highlights: Multi-scale numerical model for ASR-affected engineering structures is presented. ASR-expansion rate at the meso-scale is made dependent on the temperature values. A model of concrete Salanfe dam in Switzerland is calibrated with the field measurements. The model shows low dependence of the ASR expansion rate on the temperature variation. Anisotropic macroscopic deformations correlate with crack patterns at the meso-scale.