Robot Structural Analysis Forum
Welcome to Autodesk’s Robot Structural Analysis Forums. Share your knowledge, ask questions, and explore popular Robot Structural Analysis topics.
cancel
Showing results for 
Show  only  | Search instead for 
Did you mean: 

Applying notional loads

8 REPLIES 8
Reply
Message 1 of 9
CameronEC
1824 Views, 8 Replies

Applying notional loads

Is there any way in ROBOT to have two notional load cases in the same direction?

 

In other words, am I able to create more than four notional load cases (one in each direction; +x, -x, +y, -y).?

8 REPLIES 8
Message 2 of 9
Rafal.Gaweda
in reply to: CameronEC

For now not possible, even thru API.



Rafal Gaweda
Message 3 of 9
CameronEC
in reply to: Rafal.Gaweda

Thanks for the reply.

 

The Canadian code requires there is a notional load for each factored vertical load in each combination. This requires that multiple notional load cases are applied.

 

As per clause 8.4.1 of CSA S16-09

"The translational load effects produced by notional lateral loads, applied at each storey, equal to 0.005

times the factored gravity loads contributed by that storey, shall be added to the lateral loads for each load

combination. The notional lateral loads shall be applied in both orthogonal directions independently when

the three-dimensional effects of loading are included in the analysis of the structure."

 

Message 4 of 9
Rafal.Gaweda
in reply to: CameronEC

Could you please explain how this works for you?

 

I understand this cluase this way:

- all gravity loads should be used to generate notional loadcase(s) with factor 0.005 in both orthogonal directions, so you will have finally 4 cases X+ X- Y+ Y-

- then use them for each load combination or each combination with lateral loads.



Rafal Gaweda
Message 5 of 9
PatrickEC
in reply to: CameronEC

Rafal:

 

"all gravity loads should be used to generate notional loadcase(s) with factor 0.005 in both orthogonal directions"

 

"equal to 0.005 times the factored gravity loads contributed by that storey, shall be added to the lateral loads for each load combination"

 

Factored vertical loads for each load combination are different.

 

Thetefore, our interpretations is that:

for [1.2 * D + 1.4 * W + 0.5 L] ithe factored gravity loads are [1.2 * D + 0.5 * L] and

for [1.2 * D + 1.4 * W + 0.5 S] this is [1.2 * D + 0.5 * S], etc.

 

So notional loads need to be different for each load combination.

Message 6 of 9
CameronEC
in reply to: Rafal.Gaweda

see post by PatrickEC

Message 7 of 9
Rafal.Gaweda
in reply to: CameronEC

Got it.



Rafal Gaweda
Message 8 of 9
dJStefan
in reply to: Rafal.Gaweda

Is there any update on setting up more than one notional load in each direction?  I've simplified the number of EHF cases to consider down to 2 but don't really want to end up with 2 parallel models at this point.  Has anyone found a workaround for this?

Message 9 of 9
Rafal.Gaweda
in reply to: dJStefan

Introduced in Robot v. 2014.


Rafal Gaweda

Can't find what you're looking for? Ask the community or share your knowledge.

Post to forums  

Autodesk Design & Make Report