topic Re: Element design in RSA in Robot Structural Analysis Forum

Element design in RSA

stroxy — Mon, 14 May 2012 23:21:52 GMT

After performing design calcs for an element, a green tick mark means everything is aok. A yellow tick mark usually appears with warnings and no tick when structural capacity is inadequate. Question is what are the structural implications of the design with the yellow tick? does it mean it can be used but one should be aware of the warnings or does one continue tweaking the design until a green tick mark is achieved? Just curious!!

Re: Element design in RSA

stroxy — Mon, 14 May 2012 23:24:07 GMT

Same question goes for warnings in red font and warnings in black font

Re: Element design in RSA

Anonymous — Tue, 15 May 2012 04:17:15 GMT

Depends on what your local code stipulates and level of risk if something collapses.

Re: Element design in RSA

Artur.Kosakowski — Tue, 15 May 2012 06:38:24 GMT

Assuming that you refer to the steel design - red means you exceeded the safety ratio limit ; yellow you exceeded the slenderness limit but you are below the safety ratio limit.

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Re: Element design in RSA

Anonymous — Tue, 15 May 2012 08:18:37 GMT

Referring to RC design, how do I interprete the yellow tick mark?

Re: Element design in RSA

Artur.Kosakowski — Tue, 15 May 2012 08:22:47 GMT

There were some messages (errors/warnings) displayed during calculations of reinforcement.

Re: Element design in RSA

Anonymous — Tue, 15 May 2012 08:41:02 GMT

Yes there were. I was wondering why the program does not provide the necessary reinforcement/stirrup arrangements in the design process to cover crackwidth/stirrup spacing/necessary reinforcement to satisfy seismic codes eg. EC8

Re: Element design in RSA

Artur.Kosakowski — Tue, 15 May 2012 08:49:43 GMT

It tried but for some reason was not able to. Could you send the rtd file and indicate which beam/column to look at?

Re: Element design in RSA

Anonymous — Tue, 15 May 2012 09:15:30 GMT

What is the best way to send you a big file (252MB before compression)?

Re: Element design in RSA

Artur.Kosakowski — Tue, 15 May 2012 09:23:44 GMT

Try the following:

1. Open the model with results

2. Select a small part of the model around the beam or the column you want to design and save it as a substructure (Geometry > Structure > save as substructure).

3. Export the element to the RC Design module and calculate reinforcement

4. Save the file and send it indicating which beam or column should be investigated.

If the file after compression is still to big select only the beam or the column in point 2.

Re: Element design in RSA

Anonymous — Tue, 15 May 2012 11:49:14 GMT

Hi Artur, please find the file attached

Re: Element design in RSA

Artur.Kosakowski — Thu, 17 May 2012 13:45:24 GMT

POST EDITED (Change of information) !

After more detailed analysis of the reported situation I decided to edit this message and replace the original answer with the updated one.

The errors are displayed for beams with 'free ends' (no supports at span ends) as well as 'free' ends of cantilevers and have the same cause. Currently such 'free' ends are for some verifications treated in the same way as if there were supports there which results in unnecessary check of the provisions that should not be checked at all. This may result in having he following errors displayed:

Stirrup spacing is incorrect according to the seismic requirements (EN 1998-1:2004, 5.4.3.1.2 (6)P b )

The position of transversal reinforcement is incorrect according to seismic requirements ( EN 1998-1:2004, 5.4.3.1.2 (6)P )

Reinforcement percentage below allowable values due to the seismic requirements

Re: Element design in RSA

Artur.Kosakowski — Thu, 21 Apr 2016 08:33:34 GMT

Corrected in RSA 2017.

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