UNIVERSITÉ TECHNIQUE DE CONSTRUCTIONS DE BUCAREST Faculté dʼIngénierie en Langues Étrangères Filière Francophone État-limite de service – Mâitrise de la fissuration Application par C. Ruşanu 1 Maîtrise de la fissuration – Application Données: b w = 300mm, h w =600mm, béton C25/30, Acier S500, Classe structurale S4, Classe d’exposition XC2, Moment de service M ser =153kNm, charges de longue durée, Moment à ELU M Ed =253.13 kNm, l’enrobage nominal c nom =35mm a) Déterminez le moment ultime; b) Déterminez les contraintes dans les armatures: a. – avant la fissuration ; b. – si le moment est égal à M ser . c) Vérifiez le contrôle de la fissuration sans calcul direct; d) Déterminez l’ouverture calculée des fissures. Corrigé a) Le moment ultime Resistances des matériaux = = 25 1.5 = 13.33 = = 500 1.15 ≅ 435 420 600 300 50
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