Autodesk Robot Structural Analysis

[#1]

I notice  very high internal moments/eccentricities being reported in the calculation note for a RC column designed with seismic disposition (DCM) according to EC8.  I have tried to figure out the cause, but after searching through various results tables such as internal forces, nodal displacements, applied loads, I am still at a loss. I have attached screen shots of the calculation note plus tables mentioned . Would appreciate some info on where these high moments/eccentricities are coming from or where RSA gets these values.

[#2]

It seems that it is some port of the effects you observed for the model mentioned in this post:

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/column-basement-wall-interface-singularity-i...

I will return to you as soon as some conclusions are known.

BTW: are you observing it for EC8 seismic dispositions in the final edition of EC1 (EN 1991-1-1:...) or in the EC1 pre-norm (ENV 1991-1-1:...)?

It is strongly recommended to use the final edition.

Regards,

[#3]

Thanks Pawel

yes it is from the same model. 

BTW: are you observing it for EC8 seismic dispositions in the final edition of EC1 (EN 1991-1-1:...) or in the EC1 pre-norm (ENV 1991-1-1:...)?

Did you mean final edition of EC2?

[#4]

Did you mean final edition of EC2?

Yes.

Regards,

[#5]

Hello Pawel

Am i correct in assuming that the internal forces shown in the ULS verification of the Column calculation note in the RC Column design module are imported directly from the analysis module and that I should be able to locate these values in the internal forces tables of the analysis module?

[#6]

Yes, it you open the table of forces the values at the tops of the columns should correspond to the values in Loads table in RC Column design.

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Regards,

[#7]

Then there must be a bug somewhere, because looking at the design value of Msdz 858.36KNm used in the ULS verification and the global extreme value of 5.15KNm from the internal forces table, something does not look right.  

Any news from the development team yet?

[#8]

sorry forgot to attach screenshots