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Valued Contributor
jo2ny
Posts: 82
Registered: ‎02-07-2012
Accepted Solution

Complex Section - Lattice

593 Views, 8 Replies
03-15-2012 08:08 AM

Hello,

 

i need to create a lattice beam between two UPN 300 profiles as shown in the attached picture.

 

I created first a model with 4 supports that would simulate the connection between the lattice ( upper and lower chords) and the UPN sections.

I did the calculation and the steel deign for this model, and everything is ok so far.

 

The problem is that now i need to integrate this lattice into the bigger model, where I am unable to put the 4 supports.

In the bigger model I must connect the lattice to beams with UPN300 section.

 

How would you do this?

 

I tried to use the Complex Section property and define a Lattice in XZ plane with the post and the diagonal made of TCAR40x4 sections.

The result was not the same.

I'm not shure how the lattice chords (upper and lower) would be defined in this case.

 

 

 

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Product Support
Artur.Kosakowski
Posts: 4,777
Registered: ‎12-17-2010

Re: Complex Section - Lattice

03-15-2012 08:27 AM in reply to: jo2ny

Try to create the dummy bars from the nodes of UPN 300 up and down to the nodes of the top and bottom chords of the lattice. This is similar to the solution I proposed for http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Rafter-on-wall-problem/td-p/3363029

 

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.



Artur Kosakowski
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Valued Contributor
jo2ny
Posts: 82
Registered: ‎02-07-2012

Re: Complex Section - Lattice

03-16-2012 12:05 AM in reply to: Artur.Kosakowski

I agree and I will use the short dummy bar solution.

 

But I would still like to know how to corectly use the Complex Section - Lattice option. Maybe it will come in handy some day and I'm not shure how it works.

 

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Product Support
Artur.Kosakowski
Posts: 4,777
Registered: ‎12-17-2010

Re: Complex Section - Lattice

03-16-2012 01:09 AM in reply to: jo2ny

This option is primarily intended for verification of complex columns under the compression force. I'm attaching some verification examples in Polish done for Polish steel code but looking at the pictures you should be able to find out what is the range of application for this option.



Artur Kosakowski
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Valued Contributor
jo2ny
Posts: 82
Registered: ‎02-07-2012

Re: Complex Section - Lattice

03-16-2012 03:01 AM in reply to: Artur.Kosakowski

Nice!

I got it now, thanks! Tried modeling and it worked. Further, I have to test it sometime.

 

Case closed :smileyhappy:

 

P.S.

It's such a nice feeling when you learn something new... Even if it's a minor thing, it usualy is a starting point for further reaserch.

 

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Member
boobathi
Posts: 3
Registered: ‎06-27-2013

Re: Complex Section - Lattice

06-27-2013 04:46 AM in reply to: jo2ny

Dear 

  Can I get the same examples in English. I am trying for crane column a batterned column . Is it possible to apply crane load in one column and other columns to be extended up to roof .

                                                                In frame generator if crane column facility had been added means it will be very use ful

 

Thanks and regards 

M.S.Boobathi 

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Rafal.Gaweda
Posts: 5,070
Registered: ‎04-26-2010

Re: Complex Section - Lattice

06-27-2013 04:52 AM in reply to: boobathi

I such case you have to create model as on your screen shot



Rafal Gaweda
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Member
boobathi
Posts: 3
Registered: ‎06-27-2013

Re: Complex Section - Lattice

06-27-2013 05:25 AM in reply to: jo2ny

Thanks 

       Whether battern plates also to be modled ?  Please advise me how to model battern plae . 

Thanks and regards 

 

M.S.Boobathi 

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Product Support
Rafal.Gaweda
Posts: 5,070
Registered: ‎04-26-2010

Re: Complex Section - Lattice

06-27-2013 05:32 AM in reply to: boobathi

       Whether battern plates also to be modled ?  Please advise me how to model battern plae . 

 

Connect columns by bars with correct section

 



Rafal Gaweda
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