wind load

[1426229]

Hi Artur & Rafal,

I have a model, which has hollow-core slab. The hollow core slab should transfer the horizontal wind load to core of the building. In Robot, I have modelled  it as diaghragm one-way slab and the supporting beam as fffxxx and ffxxxx. I get a lot of instabily problem, but as i change the beam release to ffxxxx and ffxxxx, the instabilty decreases to one. The instability that robot says, it is not located in end of beam, which is a little bit strange.
My second problem is that I am new to Robot, I do not know, how to check, whether the wind load is transferred to core wall. I just want to see the shear, moment and stresses that are produced from the wind in the core wall. I will really appreciate, if you could show a step by step instruction. I have attached the model.

Thanks in advance. 

[Artur.Kosakowski]

1. You should not define releases for all bars meeting in one node (nodes  1018 1021 1026 1027)

2. After setting Skyline solver only instabilities of type 3 are reported. This suggests the difference in stiffness of elements due to use of RLink elements

3. To check replace all slab flexible diaphragm 1 calculation model panel type with curtain wall one -> no instability reported

To check the results - select wind case as active and display maps of e.g. displacements, bending moments or shear forces.

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