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Beam forces in ETABS vs. SAFE

Beam forces in ETABS vs. SAFE

Beam forces in ETABS vs. SAFE

(OP)
I've calculate a structure in Etabs, only for gravitational loads and then I export the first storey in SAFE to calculate both the beam and slab forces.
My question is WHY for the same beam and the same combination the shear force at the end of the beam is 150kN (ETABS) and 100kN (SAFE).
What i'm doing wrong?

Note: Manually calculations is all most equal with the results from ETABS.

Thanks in advance!

RE: Beam forces in ETABS vs. SAFE

Share your model, please.

RE: Beam forces in ETABS vs. SAFE

I have faces same problem. Etbas and safe vary a lot in beam design.  

RE: Beam forces in ETABS vs. SAFE

Is your slab modeled as a shell element in ETABS? If so, a section cut would produce the correct result.

If slab is modeled as membrane (no out-of-plane stiffness), I think the results will match.

It's no trick to get the answers when you have all the data. The trick is to get the answers when you only have half the data and half that is wrong and you don't know which half - LORD KELVIN

RE: Beam forces in ETABS vs. SAFE


Lebron 1987,

After you export your floor from ETABS to SAFE, assign all bending modifiers as 0.0001 in SAFE in "Assign" menu and uncheck the "thick plate" option in slab properties. Now run your  SAFE model and compare your beam shear in ETABS and SAFE, these will match.

Regards,


 

IR

RE: Beam forces in ETABS vs. SAFE

(OP)
@slickdeals: the slab was modelled as membrane element in Etabs.

@nonlinearer: I will try what you say

Thanks for your answers!  

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