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Original Articles

Comportement mécanique de poutres attaquées par la corrosion

Utilisation du code de calcul Eficos

, &
Pages 195-211 | Published online: 04 Oct 2011
 

ABSTRACT

The aim of this study is to predict the mechanical behaviour of beams which were in sea water for 40 years. Mechanical experimentations were carried out after inspection of beams: loading in four-point bending and loading in direct tension. The mechanical behaviour of the beams is modelled before and after being corroded, with the software Eficos. The steel corrosion is taken into account only by a reduction in steel cross section because steels have no anchorage. A good correlation is obtained between simulations and experimental results for bending in the case of reinforced concrete.

RÉSUMÉ

Cette étude a pour but de simuler le comportement mécanique des poutres de la Rance qui ont été immergées pendant 40 ans en eau de mer. Ces poutres après auscultation ont été testées mécaniquement en flexion 4-points et en traction directe. Notre travail porte sur la modélisation du comportement mécanique des poutres avant et après corrosion à l'aide du code de calcul Eficos. La prise en compte de la corrosion est limitée aux pertes de sections des aciers qui sont des ronds lisses. On obtient une bonne adéquation entre simulations et résultats expérimentaux, en particulier dans le cas de la flexion en configuration béton armé.

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