The concrete ULS design spreadsheet last posted at: Concrete ULS spreadsheet update has been updated to fix a problem encountered with non-symmetrical reinforcement using the Eurocode 2 rectangular stress block.
Download from ULS Design Functions.
Typical input and output interaction diagram are shown below for a simple rectangular section with asymmetric reinforcement.
Umom Input
Umom Interaction Diagram
 | Kapasitas Lateral Ti… on LatPile – Analysis of La… |
 | mktisis on 3D Frame with zero stiffness… |
 | dougaj4 on 3D Frame with zero stiffness… |
| dougaj4 on 3D Frame with zero stiffness… |
| mktisis on 3D Frame with zero stiffness… |
| Elastic Biaxial Bend… on Biaxial bending update | |
 | Bill Harvey on Floating Point Precision … |
| Floating Point Preci… on When does 35 not equal 35… | |
| dougaj4 on mpmath for Excel |
| dougaj4 on mpmath for Excel |
 | Kapt Blasto on mpmath for Excel |
| mktisis on 3D Frame with zero stiffness… |
| dougaj4 on 3D Frame with zero stiffness… |
| dougaj4 on 3D Frame with zero stiffness… |
| mktisis on 3D Frame with zero stiffness… |
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Not able to download the second update.
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Thanks for letting me know.
Now fixed
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Hi,
Not sure if you will see it, since it is so old, but there is a bug in the spreadsheet. When you flip the tension face to the top, it doesn’t pick up the yield strength of the bar correctly (you have to copy the value down in the table). You can check by flipping the tension face on the sample circle section, the moment capacity reduces significantly, when it should remain the same.
Thanks for these spreadsheets, they come in very handy when I’m trying to squeeze the last bit out of a section!
Mike
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Thanks for letting me know Michael. All comments get reported when they are posted, so no problem commenting on old posts.
Which version of the spreadsheet are you using (see the “about” sheet)? I ask because the download version is 2.04, which doesn’t have the problem, but my development version is 2.05, and has the problem you describe. I have fixed it, but I just need to check I haven’t un-fixed anything else.
If you could e-mail a copy of your version to dougaj4 at gmail, that would be helpful.
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