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Fissuration des chaussées en béton armé continu au jeune âge

Abstract : The present study will contribute to understanding the mechanical behavior of steel-reinforced-concrete based pavements vs. microcracking. Based upon the knowledge of concrete and the griping between concrete and steel, contact problems are investigated according to the finite-element method. The griping experiments allow us to achieve a new test: the ABA test. The present results account for accurate parameters involved in the numerical model for steel-concrete interface law. For a better understanding of cracking origins, an experimental device and original process were perfected to simulate this kind of behavior in life-size in laboratory. It brings to therefore some thermal strains at earlier stage during concrete setting. Otherwise the following points were shown : - the importance of concrete section or steel content - the importance of the friction between the slab and the holder - the influence of the kind of framework used on the craking development. Furthermore, development of mechanical characteristics and free shrinkage were determined on references. And a comparison was undertaken between experimental and calculated results.
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Thierry Lemarignier. Fissuration des chaussées en béton armé continu au jeune âge. Mécanique [physics.med-ph]. Ecole Nationale des Ponts et Chaussées, 1996. Français. ⟨tel-00523285⟩

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