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Artur.Kosakowski
Posts: 4,603
Registered: ‎12-17-2010

Re: Code ??? INTERACTION DIAGRAM FOR SHEAR WALL

10-18-2012 12:27 AM in reply to: athurD

This 'sphere' is created by calculating column capacity with generated reinforcement for all sets of axial force and bending moments. This is done by calculating equilibrium of forces in the cross section meaning that the neural axis is found (unless the entire column is under tension or compression) and then forces in each reinforcement bar as well as in concrete is determined. This is the same as for simple bending (you calculate force in compressed part of the concrete and force in reinforcement. Knowing the limit of stresses in concrete and steel you can determine the maximal bending moment the RC element can withstand) but in 3D. The formulas are these from the picture you inserted. The limits of axial force and bending moments is determined by maximal allowable stress level in concrete and steel.



Artur Kosakowski
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Distinguished Contributor
athurD
Posts: 177
Registered: ‎12-14-2011

Re: Code ??? INTERACTION DIAGRAM FOR SHEAR WALL

10-23-2012 07:32 AM in reply to: Artur.Kosakowski

Thanks, Artur
You please give me one example of calculations by hand of 3D Interaction DIAGRAM column. ???
Thank again.

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Product Support
Artur.Kosakowski
Posts: 4,603
Registered: ‎12-17-2010

Re: Code ??? INTERACTION DIAGRAM FOR SHEAR WALL

10-24-2012 12:04 AM in reply to: athurD

I'm sorry but this would be to much of calculations :smileyhappy:

 

Please check this document:

 

http://www.google.com/url?sa=t&rct=j&q=how%20to%20determine%20bending%20capacity%20for%20rc%20beam&s...

 

This is about the simple bending (so for the column that  would allow you to calculate two points of the 'sphere'; one for Mx = max and N=0 and the other for My = max and N=0 ) but the same principle applies for bi- directional bending and bi-directional bending with axial force.



Artur Kosakowski
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Distinguished Contributor
athurD
Posts: 177
Registered: ‎12-14-2011

Re: Code ??? INTERACTION DIAGRAM FOR SHEAR WALL

10-24-2012 06:17 AM in reply to: Artur.Kosakowski

thanks, Artur :smileyhappy:

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Active Contributor
PatrickSt-Louis5310
Posts: 37
Registered: ‎09-19-2010

Re: Code ??? INTERACTION DIAGRAM FOR SHEAR WALL

11-05-2012 08:15 AM in reply to: athurD

We also hope that RSA will include, more features for this kind of topics , we see some power- point presentation on AU university where the speaker show a patner ship between RSA and Alstiscad about this topic, so we hope that for the next release that RSA team will include a more complete design report for design of RC shear wall in Seismic Area for major Seismic code, such as EC8, ACI and CSA etc..

as the Bentley did it recently for RAM  or SOFTEK with is S-concrete modulus, as illustrated in the adress below :

http://communities.bentley.com/other/old_site_member_blogs/bentley_employees/b/josh_taylors_blog/arc...

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