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recherche d'information utiles

Kahina Oud

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Bonsoir tous le monde, je suis à la recherche de quelque réponses pr un devoir très urgent svp je veut savoir dans le calcul des flambements des poteaux pourquoi il est préférable de prendre  λ =35 ??? autre question,  pourquoi on limite la contrainte du béton comprimé  σbc = 0.6 fc28 pourquoi on le limite à 60% et pas à 100% ??? Mercii

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