Define mass source of Robot Analysis

[A.wikipedia]

Hey all.

I find Define mass source of Robot.
 So Where it is of robot.

Of Etabs.

[Romanich]

You can use search engine on this forum and also look at this thread http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Conversion-load-to-mass/m-p/3050232#M160

And don't forget to use help!

[Bassamlubbad1]

Dears:

First I want to thank you for your clarification to the mass source definition

I just have question if you dont mind, 

In mass source definition we normally (In Etabs) add 

1-Self weight

2-Super imposed dead load

3-Percentage of live load

is it the same in Robot?

and also how can I show the " Auto seismic loads calculations" in order to know the exact weight considered?

as it exist in Etabs 

Appreciate your support

[Bassamlubbad1]

Dears:

First I want to thank you for your clarification to the mass source definition

I just have question if you dont mind, 

In mass source definition we normally (In Etabs) add 

1-Self weight

2-Super imposed dead load

3-Percentage of live load

is it the same in Robot or am just adding super imposed dead loads & percentage of live loads only as the SELF WEIGHT is assigned automatically?

and also how can I show the " Auto seismic loads calculations" in order to know the exact mass considered?

Appreciate your support

[pavlosth]

In general, you do not have to define the mass of the frame, as it is automatically calculated from Robot. So only add superimposed dead and the percentage of the live loads that you want to assume for earthquake.

Perhaps if you set the mass of the material to zero, or if you delete the first loadcase that by default is assigned with the self-weight and mass of the structure, you have to manually insert the mass, but I never have attempted such a thing.

To check the mass, select "Modal Analysis Results" from the tables and you can see the total mass of the structure.

[Artur.Kosakowski · Accepted solution]

Hi @Bassamlubbad1

---

In mass source definition we normally (In Etabs) add 

1-Self weight

2-Super imposed dead load

3-Percentage of live load

is it the same in Robot?

The self weight is by default considered automatically for the other load types you can convert them into masses with the corresponding factors in the dialog infiocated bu @Romanich (thank you for helping out) 

and also how can I show the " Auto seismic loads calculations" in order to know the exact weight considered?

Assuming you refer to the value of mass considered for seismic analysis it is diapered in the results of the modal analysis table or in the calculation note.

I'd strongly recommend watching the recording of the Introduction to seismic and spectral analysis Robot webinar.

If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.

[Artur.Kosakowski]

Hi @Bassamlubbad1

I just wanted to check if you received the information you were looking for.

[Bassamlubbad1]

Dears:

I really appreciate your professional support as usual

Thanks

[Artur.Kosakowski]

Hi @Bassamlubbad1

Thank you on behalf of all of us participating in this thread 

Would you mind marking this thread with the Accepted solution so that others could find answer on the similar question they may have in the future faster? Thank you.