Mass in Nodes.

Mass in Nodes.

Anonymous
Not applicable
713 Views
7 Replies
Message 1 of 8

Mass in Nodes.

Anonymous
Not applicable

Hi. Does RSA 2015 calculate properly mass (self weight) of structure in nodes. I mean - when I have got an RC panel that is 1m thick and I want to connect it with another one - does RSA 2015 sum up the masses, or subtract them.

0 Likes
714 Views
7 Replies
Replies (7)
Message 2 of 8

Rafal.Gaweda
Autodesk Support
Autodesk Support
Whatever you mean by this question ; the answer is "sum up"


Rafal Gaweda
0 Likes
Message 3 of 8

Anonymous
Not applicable

Reffering to my question, that You probably did not understeand.

I asked about simple concrete wall connections. Imagine having two walls that are 1m thick, and 1 m high. Like on the image below.

Capture.JPG

 

I totally agree that RSA 2015 add masses in nodes.

 

The problem starts when You have got large concrete structure. Robot calculate self weight of the structure wrong. Maybe it is a good idea to correct it in the next release.

 

0 Likes
Message 4 of 8

Rafal.Gaweda
Autodesk Support
Autodesk Support
Not planned


Rafal Gaweda
0 Likes
Message 5 of 8

Artur.Kosakowski
Autodesk Support
Autodesk Support

mass.PNG



Artur Kosakowski
0 Likes
Message 6 of 8

Anonymous
Not applicable

Yes, agree L type joint is bad example. But problem still exist in T type joints, walls connected with slabs, slabs connected with beams, and so on.

 

 

 

 Capture.JPG

 

 

Capture21.JPG

 

Imagine having 50ty storey building, those forces are quite high then. Of course It is good to have a marigin of safety, but still not allways N force rise is the best way to keep this marigin up.

 

It is not that I am looking for problems, where there isn't any. RSA 2015 is much better than previous versions, and I admire authors. Simply I believe that this might in some situations affect building.

 

To be konservative - we always put loads on the slabs in axes, not in wall edges.That also gives some kind of safety marigin.

 

 

0 Likes
Message 7 of 8

Rafal.Gaweda
Autodesk Support
Autodesk Support
0 Likes
Message 8 of 8

Artur.Kosakowski
Autodesk Support
Autodesk Support

Do you include in your model all architectural details or is your objective to build it as simple as possible e.g. to avoid meshing problems? Do you include actual weight of reinforcement based in the distribution of rebars and wire fabrics? Do you model openings that can be disregarded for static calculations of a model? Do you model slabs to the outer edges of walls or to their center lines? Etc. 

 

What is the influence of such simplifications comparing to the one you pointed at? 

 

Personally I'd add some additional factor to the self-weight calculated based on model geometry (as defined) to account for the "missing" parts. 

 

 

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