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Une approche de plasticité au gradient en construction métalliqueA gradient plasticity approach for steel structures
Authors:Noël Challamel
Institution:Laboratoire de mécanique des structures et matériaux, INSA de Rennes, 20, avenue des Buttes de Coësmes, 35043 Rennes cedex, France
Abstract:Local buckling of steel structural members has to be well understood in order to design accurately steel structures in seismic areas. Induced softening moment-curvature law leads to a well known ill-posedness elastoplastic evolution problem. Localization is chosen to be controlled with a gradient plasticity approach. The concept of cross-section behavioural classes, classically adopted in modern rule design, should be substituted by the concept of member behavioural classes. To cite this article: N. Challamel, C. R. Mecanique 331 (2003).
Keywords:Solides et structures  Structures en acier  Voilement  Plasticité au gradient  Comportement au séisme  Localisation  Solids and structures  Steel structures  Local buckling  Gradient plasticity  Seismic behavior  Localization
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