RC curved beam

[Anonymous]

Hi ,

I am trying to design a curved beam and I need to check if my design is accurate. So I compared curved beam with a straight one. 

Can any one let me know if Robot can give me the real deflection and momentum for a curved beam? does the attaced  results seems OK? 

How does robot calculate the defelction for curved beam.

Finaly what the difference between the deformation and the exact deformation of the bar?

Thanks.

[HoshangMustafa]

Hi

Finaly what the difference between the deformation and the exact deformation of the bar?

Please find the attached link:

http://forums.autodesk.com/t5/robot-structural-analysis/exact-deformation-for-bars/m-p/4364810#M1602...

[Anonymous]

Thank you  HoshangMustafa for your answer it does help ,

but I still need to know if my curved beam is represented exactly in Robot.

[Artur.Kosakowski]

Mind that for the curved beam the value on the diagram is the total displacement (being vertical plus horizontal components).  If you want to check the vertical component only then the easiest seem to check the vertical displacement of the node defined in the middle of an arch in the displacements table.

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.

[Anonymous]

Thank you Artur for your respond, 

Looking at the tabular results, the horizontal displacement is 0 as attached, probably because in my case I don't have any horizontal forces. (Am I right?)

However, looking at the deflection results , (as seen in the attached picture). they are all zeros! why is that?

Finaly, the required area of reinforcement I am getting for this beam, I assume only based on the flexual resistance, does robot do shear check, torision check, and crack check for curved beam?

Regards

[Anonymous]

I think the curved beam is represented by a several straight beams. In that case you`ll need to design each beam to shear, bending and torsion.

Correct me if I´m wrong.

[Anonymous]

I think Robot already did that for bending and gave the required area of reinforcement based on that , However I think we need to relay either on hand calculation or on another software to make the rest of checks.

basicly because curved beam will be afected to a shear and  torisional force (I hope someone will correct me if I am wrong). 

[Anonymous]

Can you attach the file?  

[Anonymous]

FILE IS ATTACHED

[Anonymous · Accepted solution]

I can´t open the file, RSA crash when I try.

I create a simple model of a curved beam and the behavior is the expected.

Twisting moment appears along the beam, indeed.

[Anonymous]

Can u please post your model so I can compare it with mine.

Thanks