Abstract
This paper describes a testing procedure for concrete joints suitable for cored samples. Compact cylindrical geometries are employed in testing arrangements for notched fracture beams and dnotched shear specimens. Numerical idealisations of the geometries are presented which allow constitutive joint models to be calibrated without the need for a non-linear finite element program. A sequential material parameter identification procedure is presented which uses data measured directly from the tests. Relationships are derived which relate the apparent peak stresses to the elastic limit stresses in both tension and shear, the later being considered to be true material parameters. The procedures are tested for a particular numerical model and are shown to give material parameters that produce numerical results consistent with the tests from which they are derived.
Résumé
Ce rapport décrit une méthode d'analyse des éprouvettes obtenues à partir de joints de construction en béton. Les essais à la rupture et au cisaillement sont réalisés sur des éprouvettes cylindriques fissurées afin d'initier la rupture. Des géométries idéales qui permettent aux modèles d'être calibrés sans recours aux calculs non-linéaires par éléments finis sont présentées. Un procédé d'identification des caractéristiques des matériaux qui utilise les données issues directement des essais est élaboré. Les relations entre les contraintes maximales apparentes et les contraintes élastiques sont établies pour la traction et le cisaillement, celles-ci étant les caractéristiques réelles des matériaux. Ces méthodes sont vérifiées pour un modèle spécifique et donnent des propriétés qui permetten d'obtenir les résultats validés par les essais.
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Jefferson, A.D., Mills, N.R. Fracture and shear properties of concrete construction joints from core samples. Mat. Struct. 31, 595–601 (1998). https://doi.org/10.1007/BF02480609
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DOI: https://doi.org/10.1007/BF02480609