Center of gravity, rigidity and mass

[sweapon]

Hi everyone

Where in robot can i find these information about a structure?
Center of rigidity
Center of mass


Kind regards
Alex

[Rafacascudo · Accepted solution]

Analysis menu /Calculation notes/ Full note

[Mohammed_Ata · Accepted solution]

From Results menu >> Stories >> Values' tab ... You will find table of G & R for each story . 

This picture shows . 

[Μηχανικος]

And this is how you can view the centre of rigidity and centre of gravity on your model.

Results -> Diagrams for buildings -> Forces

[aimanalaawar]

Hi, the checkboxes for center of gravity, rigidity and mass are locked to me in the table of Stories Results. Is it possible that I am missing something before calculations

Thank you for your help

[cdmatheus]

Hi @aimanalaawar

You need to define stories before calculations

[aimanalaawar]

Thank you @cdmatheus, I had already defined stories but no worries I have known my mistake I did not see the values tab 

I have another question regarding residual mode for seismic calculation

I have made a modal analysis for a five story reinforced concrete building based on the UBC97 code

The mass participation for X & Y directions is about 73% and the frequency is about 33 (no significant change in these results from mode number 30 to mode number 40)

I have read that for such case residual mode should be used for seismic analysis, but it seems that it is not available for UBC97. What should I do in this case

[Artur.Kosakowski]

Hi @aimanalaawar

My assumption is that this question was answered by @mustafahesenow (thank you) in this topic:

https://forums.autodesk.com/t5/robot-structural-analysis-forum/seismic-analysis-with-residual-mode-u...

Is this correct?

[aimanalaawar]

Thank you @Artur.Kosakowski