dalle pleine

[Anonymous]

j'ai un panneau de dalle 13.5 sur 5.8 comment fait ARSA le calcul d'une dalle pleine dans un seul sens c'est pas dans les deux sens. 

[Artur.Kosakowski · Accepted solution]

The calculation of reinforcement is based on the actual distribution of internal forces in the panel. For a slab of such dimensions the values of bending in one direction will be much larger than in the other (assuming the same support conditions for all edges). In addition you may also define linear releases (e.g. allowing for vertical displacements along the edges that are 'not' supported or define the orthotropic thickness with the reduced Young modulus in the 'secondary' direction. Finally you can set this definition in the reinforcement label assigned to the slab.

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[Anonymous]

1/ Merci pour votre réponse rapide,alors Robot ne vérifie pas automatiquement esque la dalle porte dans les deux sens ou dans un seul sens 

(l/L<0.4 dans un seul sens, l/L>0.4 dans les deux sens suivant le BAEL 91.)

2/ aprés le calcul et dans le feraillage théorique il me donne un message "la flèche admissible de panneau a été dépassée" si je passe au feraillage réel il me donne des resultats accéptable sans message de "flèche " 

pour quoi ce message s'affiche seulement dans le message théorique ? 

[Artur.Kosakowski]

1. This is just the 'simplified' approach where you assume that in the situation when one side of  a slab is much longer than the other you may disregard the bending in one direction as being small enough to be ignored (assuming the minimal reinforcement level). What Robot (and other FEM type program) does is to calculate the exact value of this bending too. In such case you can decide to calculate the necessary amount of reinforcement based on such calculated values (it may turn out that they are larger than the minimal reinforcement area) or just assume the minimal one using e.g. the unidirectional reinforcement check box in the reinforcement label assigned to this slab.

2. The RC Slab Provided Reinforcement module only distribute the reinforcement you calculated in the RC Slab Required Reinforcement module and it does not display any excessive deflection errors. It is assumed that you have taken care of that at the RC Slab Required Reinforcement stage.