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- W2227123048 abstract "Irreversible displacements are important to quantify in the assessment of the behavior of concrete dams. Irreversible displacements can manifest themselves immediately during the first filling of the reservoir or a later date during the service life of the structure. Irreversible displacements are usually associated with settlements of the foundation, creep of the concrete, or chemical reactions associated with material properties, such as the alkali-aggregate reaction. Linear regression models are commonly used to analyze displacement data from monitoring instruments and to separate the response into hydrostatic, seasonal and irreversible components. However, linear regression requires some assumptions relative to the form of the models and cannot distinguish between the contributions from the various sources of irreversible displacements. Multivariate statistical analysis procedures are proposed as an alternative to linear regression analysis. The proposed methods offer the advantage of being nonparametric and can be used to analyze components of displacements from several instruments simultaneously and identify components of behavior that are highly correlated across the entire structure. The procedure is presented and applied to the analysis of the displacement data for a multiple arch dam. The method identifies the principal modes of deformation of the dam associated with thermal, reservoir and irreversible effects. The irreversible displacements can be further separated in components that can be associated with creep and swelling, which is an improvement over linear regression analysis procedures." @default.
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- W2227123048 date "2006-01-01" @default.
- W2227123048 modified "2023-10-17" @default.
- W2227123048 title "Analysis Of Irreversible Displacements In A Multiple Arch Concrete Dam Using Principal Component Analysis" @default.
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