topic Re: EC7 - Geotechnical combinations in Robot Structural Analysis Forum

EC7 - Geotechnical combinations

Anonymous — Fri, 20 May 2011 09:10:23 GMT

I'm quoting a post from a member of the augi forum regarding geotechical checks with robot.

"i've noticed that rsap2011 for footing design does not run any analysis checks for capacity/contact surface/ stability for sliding etc for the seismic (or accidental) combinations.
Is there any implementation lack of the most recent eurocode7 version (en1997-1: 2008 )?
and what is the solution to this major issue?"

Is there any workaround for this issue.?

Maybe some modification of the file that contains the geotechnical combinations?

Re: EC7 - Geotechnical combinations

Anonymous — Fri, 03 Jun 2011 16:22:11 GMT

Any advice on this issue?

How can we include ACC combinations into the geotechnical checks?

Re: EC7 - Geotechnical combinations

Rafal.Gaweda — Mon, 06 Jun 2011 09:40:26 GMT

These check are performed for SLS combinations.

If you want to use ACCidental \ SEISmic combinations for these checks you have to change their State onto SLS in rc footing module. (After importing supporting node to rc module, go to RC Element pull down menu \ Load table and then change State.)

Take a look at attached screen shot.

Re: EC7 - Geotechnical combinations

Anonymous — Wed, 08 Jun 2011 13:01:50 GMT

Rafal,

thank you very much for the response. What you propose is a solution to the problem .

I wonder if there is some way to modify the file containing the geotechnical combinations in order to avoid this manual procedure.

Re: EC7 - Geotechnical combinations

Discussion_Admin — Wed, 22 Jun 2011 11:34:34 GMT

We split your post in to its own topic in the Autodesk Robot Structural Analysis forum where there is likely to be more active feedback on the topic.

Re: EC7 - Geotechnical combinations

jneves1990 — Tue, 16 Oct 2018 10:56:30 GMT

Rafal,

@Rafal.Gaweda wrote:
These check are performed for SLS combinations.
If you want to use ACCidental \ SEISmic combinations for these checks you have to change their State onto SLS in rc footing module. (After importing supporting node to rc module, go to RC Element pull down menu \ Load table and then change State.)
Take a look at attached screen shot.

I apologize for returning to this old post but there's something that bothers me.

You said GEO combinations are the same as SLS combinations and I beliebe that is not true.

For permanent actions the multiplier for favourable and unfavourable actions is indeed 1.00; however for variable actions this multiplier is 1.30 for unfavourable actions, which is not the case for SLS combinations.

Thus, I do believe the solution - if you're not using automatic combinations - is for robot to allow an Analysis type codenamed "GEO".