STAAD Foundation Advance CE do not check excentric foundation

RE: STAAD Foundation Advance CE do not check excentric foundation

Kris Sathia — Tue, 31 Aug 2021 16:28:38 GMT

I wasn't talking of full uplift. A full uplift is caused by a column reaction force that tries to uproot the foundation. Wind or seismic may cause full uplift.

I was talking about partial uplift. It is not necessary to have full uplift forces to produce loss of contact. A combination of a small vertically downward force on the foundation and a large moment can cause partial uplift.

See the figures below for how to identify a partial uplift condition.

RE: STAAD Foundation Advance CE do not check excentric foundation

Sadananda Swamy — Mon, 30 Aug 2021 11:21:04 GMT

As such there are no forces which are creating huge uplift forces. where can i find if there is partial loss of contact?

RE: STAAD Foundation Advance CE do not check excentric foundation

Kris Sathia — Fri, 27 Aug 2021 12:50:59 GMT

If the footing experiences a partial loss of contact for any of the ultimate load cases, the program will calculate the top reinforcement.

Are there any ultimate load cases in your model where there is a partial loss of contact? Doesn't the output show any top reinforcement?

RE: STAAD Foundation Advance CE do not check excentric foundation

Sadananda Swamy — Fri, 27 Aug 2021 07:37:25 GMT

What i have been getting in the calculation sheet for Top reinforcement design requirement is " Top reinforcement needs to be provided because of resultant negative pressure coming from net pressure calculations for bending. Should i calculate the top reinforcement as the SFA has not specified any

RE: STAAD Foundation Advance CE do not check excentric foundation

Kris Sathia — Fri, 27 Aug 2021 06:27:32 GMT

Your question:

Will be the footing be designed considering the additional moments that are going to be generated due to the eccentricity.

Answer

Yes

--------------------------------------------------------

Your question:

Will the footing be designed even for the negative base pressure. What i have been seeing in the message is the negative pressures are nullified by the software, how will it actually work practically?

Answer:

Negative pressures are not ignored or nullified. The neutral axis (NA) position is re-evaluated until there are no negative pressures at the base. At this point, the CG of the soil pressure bulb coincides with the CG of the applied load for any given load case. Parts of the footing on one side of the NA will have zero pressures, parts of the other side will have non-zero (upward directed pressures). The CG of the non-zero pressures coincides with the CG of the load at its eccentric position.

RE: STAAD Foundation Advance CE do not check excentric foundation

Sadananda Swamy — Fri, 27 Aug 2021 05:49:42 GMT

Will be the footing be designed considering the additional moments that are going to be generated due to the eccentricity. Will the footing be designed even for the negative base pressure. What i have been seeing in the message is the negative pressures are nullified by the software, how will it actually work practically?

RE: STAAD Foundation Advance CE do not check excentric foundation

Kris Sathia — Mon, 06 Jan 2020 12:56:23 GMT

The version 9.2.0.34 is now available for download from the Bentley software downloads page.

RE: STAAD Foundation Advance CE do not check excentric foundation

Kris Sathia — Tue, 10 Dec 2019 12:35:42 GMT

We have already started the process of going through the final set of checks before the software gets posted on the Bentley SELECT downloads site. So, you should see it there in the next few days.

RE: STAAD Foundation Advance CE do not check excentric foundation

raa — Mon, 09 Dec 2019 05:06:15 GMT

Hi Kris,

Any update on the release of SFA CE??

RE: STAAD Foundation Advance CE do not check excentric foundation

raa — Thu, 07 Nov 2019 02:07:34 GMT

Thank you Kris for the update. We will just wait for the update release within this month...

RE: STAAD Foundation Advance CE do not check excentric foundation

Kris Sathia — Tue, 29 Oct 2019 01:00:03 GMT

We are in the last stages of testing and the new version should be released in November. If there is a particular model for which you can provide us the input (upload an SFA file and let us know the column offset values), we can run it here and provide the calculation report.

RE: STAAD Foundation Advance CE do not check excentric foundation

raa — Tue, 22 Oct 2019 08:29:01 GMT

Any update on this.

I thought the update will be released in couple of weeks from Setember 21, 2019 and its more than a month already??????

RE: STAAD Foundation Advance CE do not check excentric foundation

EdwardVC — Mon, 23 Sep 2019 19:08:58 GMT

This problem (bar size block) occurr when I use IS unit type, when is set English unit the bar size, block the maximun pedestal bar

RE: STAAD Foundation Advance CE do not check excentric foundation

EdwardVC — Fri, 20 Sep 2019 17:37:09 GMT

Thanks, I using SFA 9.1.0.14 but the probblem persist

communities.bentley.com/.../isolate-foundation.sfa

RE: STAAD Foundation Advance CE do not check excentric foundation

Sye — Fri, 20 Sep 2019 16:36:30 GMT

Yes the footing design with eccentric column was disabled temporarily as it was not correctly implemented. The good news is that our development team has reinstated the feature and it will be available in the next release which is coming out in a couple of weeks.

The pedestal bar sizes should be active though. Please ensure that you are using the latest SFA 9.1.0.14 version and the Consider Pedestal radio button is set to Yes.