flat slab pinned support modeling

[Anonymous]

Hello,

Can anybody help with modelling flat slab on linear supports or explain why occurs negative (sagging) moment at support at Y direction (see below screenshot - moment in Y direction)? Assumed linear pinned support around opening.

Thanks in advance

Alex

[teixeiranh]

Model please. On the corners it's expected, in the middle depends on the size of your hole and in the size of your FEMesh.

[Anonymous]

Hi teixeiranh,

Thanks for request. I agree with you about corner moments, I just wondered when I had seen (sagging) moment above support. Model is in attachment.

Thanks

Alex

[Anonymous]

Hi,

Can anybody comment a bit more what to do in such cases? Should I just ignore those moments? I am new in this software and probably there is some mistake in model, can someone just have a quick look on the model?

Thanks

Alex

[Artur.Kosakowski · Accepted solution]

Check the shape of deformation first. I think that you may reduce this effect by having denser mesh (more supported nodes along the edge of the opening). 

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