Charge horizontale trop grande

[FabriceMendelski3705]

Bonjour.

Après modélisation sur robot d'un portique plan (40m x 5m) sur Autodesk Analysis, on obtient une réaction horizontale trop grande ( Fx = 17T voir pièce jointe).

Pouvez-vous me dire pourquoi?

Pouvez-vous me donner la formule q'utilise Robot pour calculer les réactions d'appuis?

http://we.tl/NOubdjqmbO

Cordialement.

[Artur.Kosakowski · Accepted solution]

Looking at the deformation you can see that HEB100 profile of lenght 40 m deforms by approx. 4m in its middle for case1. If so it has to drag the top of the columns towards the center of the frame which causes the generation of large horizontal reactions. If you increase the size of the section so that it does not deform that much you will also reduce the values of the horizontal reactions.

Assuming that I managed to explain the way Robot calculates reactions what would be the way would you do this?