Autodesk Robot Structural Analysis

[#1]

Hi all.

I is prolem, I think Pressure under foudation raft >0. Why results Pressure Robot <0 ???????

[#2]

Because it's a reaction?  Under vertical load, a pinned column will have +ve reaction.  So under applied load, a soil will have a +ve reaction too?

[#3]

Thank tony.

So now I have to do to pressure under the foundation raft <0 ??. This is an image of my model .

[#4]

As you are supposed to tell in which direction the uplift is possible you should set UZ+ rather than UZ- (at least for a typical building ).

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.

[#5]

Thank Artur.

i selection U+.

But why Run it too long, is there a way to make it run faster???

[#6]

Hi. i is prolem.

How do I know choose U + or U- ??????

[#7]

You can try to use the multi-threaded solver.

[#8]

1. Check what is the orientation of the local Z axis of the panel

2. If you want to allow the panel to move (be uplifted) in the direction of the positive Z axis then you select UZ+. Otherwise UZ-.

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.

[#9]

Hi.

      "You can try to use the multi-threaded solver."

Sorry I do not quite understand, can you give me an picture example.

thank Artur

[#10 · Accepted solution]