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.
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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