Radial joint pattern in SAP2000

[Geocito]

Does anybody know how to apply a radial joint pattern in SAP2000?

I'm modelling a circular slab on grade supporting a stockpile (cone shaped load). I've defined the structure but cannot assign a cone shaped joint pattern to the joints to get a cone shaped load since, even though I'm working on a cylindrical coordinate system, the joint pattern form only admits a linear Ax+By+Cz+D joint pattern, while I need Ar+D.

I'm dividing the circle into sectors and applying a different joint pattern to each of them, but this is a rough approximation.

Any ideas?

 

[Geocito]

Sorry, there is an old thread about this:

http://www.eng-tips.com/viewthread.cfm?qid=264774

The solution given there is complex to apply.
Any other ideas?