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Longueur du flambement dans le portique (urgent)

hussein said

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Bonjour, je veux une prob dans le cas dune ossature portique, la poutre est soumi un moment et effort normal negative donc compression, si qui montre cette poutre travaille dans le cas de partiellement ou entierement comprimee, mais le probleme comment on determine la valeur de Lf. 


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