No support

[MUHANNAD.ABU_ABDO]

What is the correct way to apply soil pressure ( reaction ) for raft foundation ?! when i apply Kz (Subgrade reaction i calculate it from 120*qall ) but the problem is when i analyze the raft appreas problem ( No support ) ?! how is that ? .. and how i can show the pressure under footing ??

Thanks in Advance

[Rafal.Gaweda]

http://forums.autodesk.com/t5/Robot-Structural-Analysis/Unable-to-get-soil-reactions-with-elastic-pl...

http://forums.autodesk.com/t5/Robot-Structural-Analysis/Pressure-under-foudation-raft/m-p/3649008/hi...

[MUHANNAD.ABU_ABDO]

Really i'm confusion .. that's links scattering me rather than help me

[Rafal.Gaweda]

in short : apply kz in panel thickness definition to be able to see soil reaction map.

[MUHANNAD.ABU_ABDO]

Okay i did it .. and the soil map aprears .. but when there's problem ( no support ) . i don't understand , correct me if i'm wrong , this soil reaction Kz works as support , so why there's no support ?

[Rafal.Gaweda]

Support is a support = "object" (nodal, linear, planar).
Kz is a property but works as elastic support.

[MUHANNAD.ABU_ABDO]

Great .. look at this plz

[Rafal.Gaweda]

I looked and what?
No supports in your model.

[MUHANNAD.ABU_ABDO]

Why no support ? that's my question .. i definedKz correctly

[Rafal.Gaweda]

Why no support ? that's my question 

Have you applied any of nodal support? linear support? planar support ?

-> the answer is NO, you have used KZ in panel thickness defintion.

KZ defined there is not a support (understood as robot object \ item) -> warning saying "No support" is correct  = no such object in your model used.