precast design

[hafiz]

good day eveyone.

I would like to ask one question, 

1) can RSAP 2015 or 2016 design rc element as precast instead of cast in situ? if can, how? 

thanks in advance.

[Jummybear]

As I know then it cant. Precast usually means of usage prestressed concrete and trusses in it. Robot cant deal with it.

[hafiz]

Hi Jummybear,

is it availabale in Autodesk advance concrete?

I need to make a comparison with Tekla structure. I don't have enough experience with robot and zero knowledge with tekla. Any advice for the comparison?

Thanks in advance.

[Jummybear]

What do you mean by design elements? You compare different things. Robot is used for calculations, whereas Autodesk advance concrete and Tekla are mostly for modelling/drawing software, they do not perform any strength calculations.

[hafiz]

what I mean is can ROBOT design RC element such as beam, column or slab as pre-cast instead of cast in-situ. 

I run through ROBOT and found on code parameter for rc beam, there is a tick box for precast selection. 

you can see in the attached picture. these code parameter also same for column design.

But, when I try to calculate some continous beam, the rebar still act as a continous beam instead of precast beam.

The only difference is in precast mode, there is extra rebar for lifting.

Anyone can help?

[Artur.Kosakowski]

What reinforcement distribution you get and what would you like to have instead?

[saclovitzky]

I do not see a difference between designing, ie, a precast rc beam  and in-situ rc beam. The only difference I know is that, precast is done in an assembly line while in-situ is on-site but the principles in designing them are pretty the same. That's why I'm really interested if ever I tick "precast" in the dialog box, what is the difference will it make in the design process?

[Artur.Kosakowski]

The design includes the situation when a beam is lifted (supports at the hooks positions and self-weight as acting load). 

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[saclovitzky]

Does it suggest the location of the lifter in the rc beam?Also, does it suggest location of the "lifter/hook" in slabs and rc walls as well?

[Artur.Kosakowski]

No, it doesn't. 

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[saclovitzky]

"The design includes the situation when a beam is lifted (supports at the hooks positions and self-weight as acting load). "

 -So, basically what's exactly the benefit of "ticking" the precast beam. Can you further elaborate the statement above?

[Artur.Kosakowski]

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.

[hafiz]

still not solving my problem..

[Artur.Kosakowski]

I will try to help you with Robot but I'm not in the position to make comparisons to Tekla if that's your problem 

[hafiz]

it's ok about the tekla.. 

 I've been using robot for 2 years, but I never design or familiar with 'precast' option...

The only diff I see is when I select the precast option, the rebar detail only added the hooked..

Is it that only the diff..??

[Artur.Kosakowski]

As I explained in addition there is a check for the situation where the supports are at locations of hooks and bending is caused by self-weight. In such case you need (e.g. for a simply supported beam) top reinforcement for such created cantilevers at beam's ends. Also provisions for minimal reinforcement bars which are allowed (usually smaller than for standard beams). 

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.

[hafiz]

then how about the ability of robot to design various type of beam besides rectangular beam and T beam as per precast industry demand?

also how about the rc column with corbel?

and lastly the design of hollow core slab?

Thanks in advance.

[Artur.Kosakowski · Accepted solution]

Robot hasn't got a devoted module for precast elements and such elements are not supported. 

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.