Thursday, February 28, 2008

Re: Base Plate design

Alexander;

Thanks for the response.  The PDF you provided is essentially the same as what is in the design guide.  In case D, what they call 'uplift' is when you have a tensile load on the one side of the anchor rods, not a net uplift on the column itself.

But i like the idea of analyzing the plate for just moment, and then add in the uplift forces.

Thanks for responding.

Andy Heigley  

Alexander Bausk wrote:
Andy,  You may wish to read this paper in Engineering Journal '99: http://www.ce.berkeley.edu/~boza/courses/cee248/literature/AISC_EJ_Drake-Elkin.pdf The case D described in the paper deals with both uplift force and moment.  As far as I understand, the problem is not with principal scheme of the joint but with defining loads on anchor bolts/foundation. I think you could do an analysis with only the moment applied, and then distribute the axial tension among the bolts.  Regards,