Column Design with Russian codes

[SerhanB]

I'm facing some major setbacks while using provided reinforcemet module with Russian codes.

1-) Steel grade A500 or others from database SP 52-101-03 cannot be used because their design strengths are taken incorrect values

2-) Design code SP 52-01-2003 and SP 63.13330.2012 can not be used for provided reinforcement as they provide wrong results and no info at all.

I found a post, dating back to the begining of 2013,regarding one of the issues... after a new version and many updates these errors are still going on.
I've attached two files indicating these problems and the model file. Please guide me a way out of this. 

At least I should be able to give a custom reinforcement design strength value to obtain sane results with old russian code. How can I achieve that?

Thanks

[Rafal.Gaweda]

Coorrected in 2014 SP4

[SerhanB]

Hi Rafal,

I regret to say that both issues are still valid with sp4... Default design value printed as 510 MPa (that you have shown for Rs) is incorrect. Unfortunately when A500 or another grade is selected from the list the Rs value is still taken as 225Mpa. Correct values should be determined according to the attached page of Russian code SP52-101-2003 which are

for A500

characteristic strength: 500MPa

design strength: 435MPa

[Rafal.Gaweda]

Snip code year 83 is used.
Steels are accepted according to the following table and only those (with a tolerance of up to 5 MPa) are really supported.
Previous amendments were made and tested for 395 MPa steel, which "hit" in the steel AIII 390, so the results were correct.
Steel, for example, 500 MPa has no equivalent one in old code, and is assumed to be taken as first in the list (235) and for such matters.

[SerhanB]

Is it possible to manually override those values ( ...,390, 590, ...)? from rebar database file maybe? until the new steel grade list is implemented.

[Rafal.Gaweda]

Sorry, hardcoded.

[Leader_Mohamed]

the same thing with ECCS 203 2001
the values where extremely different,but after the SP4 the values where changed and they still have wrong values.

[Artur.Kosakowski]

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@SerhanB wrote:

Is it possible to manually override those values ( ...,390, 590, ...)? from rebar database file maybe? until the new steel grade list is implemented.

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Usually the design code provides formulas so that you can e.g. enter the value of material properties to have the outcome but the Russian code is different. If you look at the attached screen capture you can see that some coefficients are just linked to the steel grades listed (included) in the code. There is no information what should be done in case e.g. steel grade is different than the listed in the code (see one of the  Rafal's previous message where this list is attached).

This is the reason that user defined steel grades are for this particular code not supported. I hope this explains the situation.

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.

[SerhanB]

Well than there is nothing to do until the new material list is implemented. For now one can not use provided reinforcement module with current materials and codes for Russia.

I appreciate it if you can register these two issues mentioned and so we can expect a solution with the next service pack or hotfix. Thank you

[Artur.Kosakowski]

I'm sorry for not being clear enough. To put it in another way the code describes what to do with the grades listed in the code itself but says nothing about what to do with the values that are not there. E.g. for steel with Rsn = 490 shall we use coefficients as for A-III or A-IV and so on.

[SerhanB]

I totally understand you; If I were in your shoes I'd leave that decision to the user. Either by asking for the design strength or by asking for the material coefficient (in the calculation options dialog). And carry on the ultimate strength design with that design value. (for both theoretical and real rebar calculations).