topic Re: precast design in Robot Structural Analysis Forum

precast design

hafiz — Tue, 02 Jun 2015 06:42:28 GMT

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.

Re: precast design

Jummybear — Tue, 02 Jun 2015 06:57:57 GMT

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

Re: precast design

hafiz — Tue, 02 Jun 2015 08:10:47 GMT

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.

Re: precast design

Jummybear — Tue, 02 Jun 2015 08:41:51 GMT

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.

Re: precast design

hafiz — Wed, 03 Jun 2015 02:38:42 GMT

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?

Re: precast design

Artur.Kosakowski — Wed, 03 Jun 2015 07:04:55 GMT

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

Re: precast design

saclovitzky — Wed, 03 Jun 2015 07:38:18 GMT

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?

Re: precast design

Artur.Kosakowski — Wed, 03 Jun 2015 08:15:01 GMT

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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Re: precast design

saclovitzky — Wed, 03 Jun 2015 09:04:38 GMT

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?

Re: precast design

Artur.Kosakowski — Wed, 03 Jun 2015 09:18:31 GMT

No, it doesn't.

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Re: precast design

saclovitzky — Wed, 03 Jun 2015 11:37:07 GMT

"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?

Re: precast design

Artur.Kosakowski — Wed, 03 Jun 2015 12:14:45 GMT

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.

Re: precast design

hafiz — Thu, 11 Jun 2015 05:16:11 GMT

still not solving my problem..

Re: precast design

Artur.Kosakowski — Thu, 11 Jun 2015 10:01:50 GMT

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

Re: precast design

hafiz — Thu, 11 Jun 2015 10:34:18 GMT

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..??

Re: precast design

Artur.Kosakowski — Fri, 12 Jun 2015 09:14:49 GMT

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).

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Re: precast design

hafiz — Mon, 15 Jun 2015 09:03:09 GMT

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.

Re: precast design

Artur.Kosakowski — Mon, 15 Jun 2015 09:29:08 GMT

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.