Résumé
Cet article rend compte d'une étude expérimentale des effets de concentrations de contraintes sur les résistances statique et dynamique du béton non armé, en compression pure. Les essais statiques et dynamiques sur prismes de béton non armé, avec et sans entaille, indiquent que la résistance à court terme et sous charge répétée n'est pas diminuéer par la présence d'une entaille circulaire. Les inclusions d'air et les micro-fissures inhérentes au béton affectent les caractéristiques de résistance et de déformation du matériau de telle sorte que l'effet du facteur de concentration des contraintes artificielles introduit est négligeable.
Summary
The effect of stress concentrations produced by a circular hole, on the static and fatigue strengths of plain concrete in uniaxial compression, is investigated by experiments. Tests conducted on prismatic specimens showed that the ultimate static compressive strength and the fatigue strength is not significantly altered by the introduction of stress concentrating hole.
The air cavities and microcracks inherently present in the concrete affect the ultimate strength and deformation characteristics of the material to such an extent that the effect of the artificially introduced stress concentrations is negligibly small.
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Raju, N.K. Effect of stress concentrations on the static and fatigue strength of concrete in compression. Mat. Constr. 3, 85–89 (1970). https://doi.org/10.1007/BF02476262
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DOI: https://doi.org/10.1007/BF02476262