Robot Not performing Code check properly for Custom section

[nany717]

Hi 

I have defined a custom section as shown below. Its a solid section type. 

When I perform code check for this beam, the results are not as expected. Its not performing lateral buckling calculations.

It is saying moment in Y might be 0 , no bending. But clearly when I go for detailed results of the beam, I have a Moment in y-direction, that too significant moment.

What am I missing here ?! Do i have to define anything else !? 

 

Code Check messages :

Also I started with a solid section , why it is saying about wall thickness being less than 3mm !!!! 

[nany717]

If it helps, here is the further info.

[Artur.Kosakowski]

1. Probably you haven't selected any section type saving it to the user database. I think the closes match would be I section.

2. Probably Ay and Az have not been marked to be calculated

3. This is based on EC3 provisions

See also:

http://forums.autodesk.com/t5/Robot-Structural-Analysis/How-to-create-thin-walled-sections/m-p/31088...

[nany717]

Thanks for the reply Artur. I have tried as you said and now i got some results. Again its not calculating buckling in y and z as shown below. 

[Artur.Kosakowski]

Bar under tension ? 

http://forums.autodesk.com/t5/Robot-Structural-Analysis/Steel-Design-no-Buckling-Analysis-with-offse...

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[nany717]

No Artur, the bar is loaded at 3 points as shown , the loads will act in both Z and lateral directions. 

[Artur.Kosakowski · Accepted solution]

Mind the sign of the axial force.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[conor_coburn]

In relation to Calculation the Ay and AZ areas for a defined section, I do not see the calculate button in RSA 2018, and I get an error in the code check saying they have not been defined, how do I do this?