Wrong Diagram Results

[vitor.gomes]

Hi! 

I'm a Civil Engineering student from Brazil, and i'm starting learning how to use Robot.
Its bad it doesn't has Braziian codes on it... But here is my problem.

When I set a load on my structure, and dont use a combination, the first thing i see in the results, is that the diagrams are almost of the time wrong... For a small difference, but they are wrong. And I delete the Self Weight, to use only the load.

Can someone help me with this? Why is it happening?

[Artur.Kosakowski · Accepted solution]

My assumption is that most likely there is some difference in the way created your model and your hand calculations. If you attach both I'll try to have a look at them.

[vitor.gomes]

Try this exercice using only the load. Bending Moment in the indicated point should be 16KNm. Thats what my hand calculations tell me, and other programs. I didnt atach it couse its too big, and in my calcutations i used repression moviment. 

I'm sending my robot strucuture too.

[vitor.gomes]

Here is what another program tells me.. I checked it in hand calculations, and its right...

[Artur.Kosakowski]

The value of teh bending moment for a structure like this depends on the stiffness of the elements of the model (EJ). Compare:

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.

[vitor.gomes]

Yea, Bro! It worked! Thanks anyway, and sorry for my delay in aswer and my stupid question.. Couse when we did hand calculations, the EA wasnt useful, couse it cancel.

But its ok!

Thanks!