Concrete column with Rigid Reinforcement

[pascal.bogdan]

I want to design a structure which has concrete columns with rigid reinforcement (an europrofile HEB300 for ex). I created the composite section in Section Definition but there's no Ix.
I used the created section in a 3D model, after the calculation the same problem appears...no Ix inertia moment (torsional inertia moment) for the column.
The same problem appears in RSA2011 version too.
I have attached some screenshots.

Thanks in advance!

[smm.144]

I want to design a structure which has concrete columns with rigid reinforcement (an europrofile HEB300 for ex). I created the composite section in Section Definition but there's no Ix.
I used the created section in a 3D model, after the calculation the same problem appears...no Ix inertia moment (torsional inertia moment) for the column.
The same problem appears in RSA2011 version too.
I have attached some screenshots.

Thanks in advance!

Press Results button from right toolbar in section definition(hover the mouse on the button to see its name).
In the Results dialog box in the General tab select "torsional constant(Ix)" in the additional calculations frame. Press calculate button.
I highly recommend you to check calculated section specifications with another resource.

[pascal.bogdan]

Press Results button from right toolbar in section definition(hover the mouse on the button to see its name).
In the Results dialog box in the General tab select "torsional constant(Ix)" in the additional calculations frame. Press calculate button.
I highly recommend you to check calculated section specifications with another resource.

Believe me I did that and no results. Actually you can see that even in a computed model the Ix value isn't available.

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To pascal.bogdan

Dear
Ix is moment of inertia about local axis ( torsional moment of inerty), and for composite sections lik you have posted it is not analysed in Robot.

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To pascal.bogdan
The section design module of robot is dedicated to analysis the stress distribution in cros sections due to axial loads , bending moments about local z and y axis and shear forces, but not for torsional stressis.
I will not sugest you to use this module if you want to analysis your posted section.
Sections defined in this module you can use as bar sections in any structure entire model in Robot but only for global analysis of structure ( to evaluate My,Mz,Fx,Fy,Fz....)
but you can't make steel, concrete and composite design of sections.

Kind Regards
Z.G.

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by the way
In results-General you must activate chech box of torsional constant (Ix) and than press calculate
You will have value for Ix

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Image is attached

[pascal.bogdan]

To pascal.bogdan
The section design module of robot is dedicated to analysis the stress distribution in cros sections due to axial loads , bending moments about local z and y axis and shear forces, but not for torsional stressis.
I will not sugest you to use this module if you want to analysis your posted section.
Sections defined in this module you can use as bar sections in any structure entire model in Robot but only for global analysis of structure ( to evaluate My,Mz,Fx,Fy,Fz....)
but you can't make steel, concrete and composite design of sections.

Kind Regards
Z.G.

But for Steel sections (created with section definition) it compute Ix.
For Concrete sections (a column) it also compute the Ix.

For composite section (concrete+steel bar) it doesn't, why? :/

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See the attachet image

[pascal.bogdan]

See the attachet image

You can see all the 3 a screenshots that will prove that I have selected that option!!!
I can make a movie too