The ULS Design Functions spreadsheet has been updated with the addition of provision for the Eurocode 2 rectangular stress block. The new spreadsheet can be downloaded from: ULS Design Functions.zip (including full open-source code).

For more details see: ULS Analysis of Concrete Beams; now with added units

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great,

im just curious why interaction diagram is going crazy in max. normal force nearby area, when non-symetrical reinforcment is defined?

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I’ll have a look. I did have some problems with the circular section giving one point on the interaction diagram being way off with the Eurocode, but not the other codes. I thought I had that fixed, but evidently not.

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in the picture you can see what i mean

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See: https://newtonexcelbach.wordpress.com/2013/07/17/concrete-uls-spreadsheet-update-2/

Thanks for the feedback, and please let me know if you find any more problems.

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you’re welcome, what have been changed?

as i see now diagram for tface=1 and tface=0 is closing nicely 🙂

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Please see problem with graphic if I do tension for both sides

https://www.dropbox.com/s/cpfjysell2lf0lw/ULS%20Design%20Functions-problem.xlsb?dl=0

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Hi metroxx,

Thanks for letting me know about this problem (and the other ones). Looking at the revisions, it looks like the fix in 2013 didn’t work when the heavier reinforcement is in compression.

Can you have a look at:

http://interactiveds.com.au/software/ULS%20Design%20Functions-problem-fixed.xlsb

and let me know if that fixes it for you.

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Works fine, thank you.

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There no calculation for max. pure tension (as max. pure compression)?

In case if I want to draw full (closed) interaction diagram 🙂

(I even can’t imagine when calculation for tension is needed so it is just for beautiful picture and not so important).

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