topic Re: Steel beam design in Robot Structural Analysis Forum

Steel beam design

Anonymous — Mon, 01 Aug 2016 16:58:03 GMT

Hello

I am studying steel design according to BS5950 and at the same time trying to apply the design using ROBOT.

This is an example in the book

Calculated moment (Without self weight) = 307.5 KN.m

Calculated shear (Without self weight) = 99 KN

But in robot I'm getting the following values as design load (I used combination 4 as design load which is 1.4dead + 1.6Live)

So my question is what did I do wrong.

Second question is according to the question it says Beam is fully restrained laterally and there is nominal torsional restrain at supports, how is this possible to be obtained in ROBOT?

Thank you all!

Re: Steel beam design

Refaat — Mon, 01 Aug 2016 19:29:59 GMT

Hello

In order to get the same results as in your example then try to do the following :

Remove self-weight form load table.
Change the nature of load case 2 from dead to imposed.
Combination case , change load factor for LC2 from (1.40 to 1.60).

I hope this helps

Refaat

Re: Steel beam design

Anonymous — Mon, 01 Aug 2016 20:18:00 GMT

Thanks! that was the mistake and it's really a bad mistake from my side

After doing this the steel design is using Shear value of 61.5 not 99 as calculated in ROBOT

May I know what's the difference between My and Mymax

And what about how can I make the beam laterally restrained in ROBOT

thank you

Re: Steel beam design

Artur.Kosakowski — Tue, 02 Aug 2016 07:38:58 GMT

After doing this the steel design is using Shear value of 61.5 not 99 as calculated in ROBOT

It is from the verification point rather than the maximal one (when the shear force in not the governing factor).

May I know what's the difference between My and Mymax

And what about how can I make the beam laterally restrained in ROBOT

See the attached picture.

I'd suggest watching the recording of the 3rd Robot webinar on steel design in the program.

http://forums.autodesk.com/t5/robot-structural-analysis/robot-structural-analysis-webinars/td-p/5523337

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.

Re: Steel beam design

Anonymous — Tue, 02 Aug 2016 11:21:34 GMT

Thanks a lot this answered my question

I will be watching the steel design webinar

Thank you

Re: Steel beam design

Anonymous — Sat, 05 Nov 2016 13:18:51 GMT

For the example, is there a way autodesk generates a section which more econmical or the software changes the section for a better and more economical section

Re: Steel beam design

Artur.Kosakowski — Mon, 07 Nov 2016 08:25:19 GMT

You may want to watch the recording of the 3rd Robot webinar available from:

http://forums.autodesk.com/t5/robot-structural-analysis-forum/robot-structural-analysis-webinars/td-p/5523337

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.

Re: Steel beam design

mohamedahsaan126 — Thu, 16 Mar 2023 07:22:15 GMT

Dear Mr. Ali MJ,
Can you share with me the book which you got this example 4.1, if you have.
Thank you.

Re: Steel beam design

mogirerickie — Thu, 01 May 2025 08:33:46 GMT

Yes, Autodesk Robot Structural Analysis has optimization tools that can help you find more economical sections for your design. Here's how it works:

Section Optimization:
- The software allows you to define multiple section options for your structural elements.
- After running the analysis, you can use the Optimization feature to let the software suggest the most efficient section based on your criteria (e.g., weight, cost, or material usage).
Code-Based Design:
- Robot Structural Analysis can optimize sections to comply with specific design codes, ensuring safety and efficiency.
Iterative Process:
- You can manually adjust sections and rerun the analysis to compare results, or let the software automate this process.
Integration with Revit:
- If you're using Autodesk Revit alongside Robot, you can synchronize changes and refine the design further.

This feature is particularly useful for balancing performance and cost in structural projects.