Load combinations - strange signs in the table

[Ronald286]

Hello,

I want to give the table of combinations for expertisa, but there are a lot of strange signs in this table(see attached picture). How to solve it?

[Artur.Kosakowski]

That suggests very large values of load factors. You can convert the code combinations into manual combinations and edit them but I don't understand the origin of this situation. Have you edited the regulation file? 

[Ronald286]

Large values of load factors? So, now I can't be sure that partial factors of loads in combinations applied correctly? And internals forces according to these combinations could be not correct? So, this could be not a simple visual problem, but a real problem for design of bearing elemnts of the building?

No, I didn't change anything in regulation files. I checked them, all factors look okey.

[Rafal.Gaweda]

 but there are a lot of strange signs in this table(see attached picture). How to solve it?

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Got it on your file.

Investigating.

[Rafal.Gaweda]

Fast workaround:

- convert code combinations onto manual combinations

- replace -1.#J factors by correct ones in Combination table.

[Ronald286]

this is a joke? i have over 2000 combinations. all of them will be in my list of combinations? and for example, if i will want to see maximum and minimum values of axial loads in columns, i will need to go thru 2000 combinations??

[Rafal.Gaweda]

Update : it works not correct for all long term live natures

[Ronald286]

Another paradox!!! see attached picture. Please, can you explain me how in my combinations i can have the load 10 with factor 1,17???? First, i have only one long term load(with partial factor 1,3), so in all ULS combinations it must be with factor 1. Second, even if i would had more than one long-term load, factor for combination would be 0,95, ant total factor would be 1,3x0,95=1,235. So, what is 1,17?????

[Rafal.Gaweda]

Combinations with wrong factors gives no results or all results =0

Have I told you you have done anything wrong? No.

Do not blame yourself. Not your fault.

[Rafal.Gaweda]

if i will want to see maximum and minimum values of axial loads in columns, i will need to go thru 2000 combinations??

Make envelope automatically or by your own.

[Rafal.Gaweda]

If you are more falimiar with Excel you can do it this way:

- generate manual combinations from code combinations

- download and start this macro

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Editing-load-cases-in-excel-API/td-p/3320573...

- on first tab use Import button

- switch to second tab

- correct factors for case 10

- press Generate button

[Ronald286]

Rafal.Gaweda, I would like to get an answer for my question. I would like to use robot automatic combinations, but if program is not able to do it or i do something bad, please, let me know. I have a lot of troubles with analysis of difficult structure components, I don't have a lot of time to spent a lot of time to create combinations(especially when exist automatic load combination function)

[Rafal.Gaweda]

Ronald,

Rafal.Gaweda,

Rafal is my name, If you do not mind please use it this way

I would like to get an answer for my question. I would like to use robot automatic combinations, but if program is not able to do it or i do something bad, please, let me know. I have a lot of troubles with analysis of difficult structure components, I don't have a lot of time to spent a lot of time to create combinations(especially when exist automatic load combination function)

I thougth it is \ was clear now - problem with long term live natures in snip sp code in automatic code combinations.

We will correct it asap. Most likely in SP3 for v.2014. When? I do not know. Mosty likely in 4-6-8 weeks time.

[Ronald286]

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@Rafal.Gaweda wrote:

We will correct it asap. Most likely in SP3 for v.2014. When? I do not know. Mosty likely in 4-6-8 weeks time.

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Perfect answer. Thank you.

[Rafal.Gaweda]

 load 10 with factor 1,17???? .... ant total factor would be 1,3x0,95=1,235. So, what is 1,17?????

1.3*0,9

Unfortunately it seems that factors for long term live loads..... you already know

[40ushek]

Do u use russiad codes?

По русским нормам считаете?  Можете связаться со мной.

[Ronald286]

I hope there are no problems with different factors and formulas in design of columns, beams and other elements according to russian code. And I hope, somebody make some tests to be sure, that all these things work correctly.