Ram Concept users

[Devil_Red]

DeadLord,

You could draw the curve beams with slab elements.
The different between beam and slab in RAM concept is that, by default,
(The beams properties do not restrain the torsion, but slab does.)
Then release the torsional restrained of the slab (which you draw as beam), that will give you same result and per the segmental beams.

Goober,

Concept does design beams, both RC and PT beams.
However, i do not recommend adding the columns at the curve beam.

[deadlord]

Dear Devil_Red ,
It's good thinking what you've just mentioned ,but the problem is how can I release the torsion from the slab region that is supposed to Be a beam?then why would I need to release the torsion?it's rather that I want the section to be designed for torsion?

Regards,

[Devil_Red]

In the Mesh input, highlight the slab (which you designated as curve beam), right click to call up the 'selection properties'.
Then under the 'behavior tab' and 'behavior', change the 'two way slab' to 'no torsion 2 way slab'.

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Although i'm not sure how Concept does the beam torsional design. As you said, i see no reason why would you need to release the torsion of the beam.
In fact, IMO, i thought it would be necessary the curve beam to design to resist the torsion.
I personally have not designed the curve beam before, can't give you further advice on that.
However, you could compare the output with some manual calculation to verify. There's a saying that FEM programs have lot of 'black box', you'll need some verification on the result.

[deadlord]

After reading your post yesterday firstly I opened Concept and looked in the slab properties how I can release the torsion ,couldn't find It the first time then after posting u back I found it,anyway,a curved beam is a beam that has torsion applied on it from the eccentricity Of the applied load on it to the shear center of the beam,in symmetric shapes the shear center is in the middle of the section(the Center) as load at any point is eccentric from the center in any point besides the point the load affects it plus every perimeter beam Bears torsion because the weight of the slab is just from one side and have no load from the other side to neutralize it and not Released at it's ends so it won't resist torsional moments.