analysis for mat foundation circular in shape

huangyhg

analysis for mat foundation circular in shape
good day,
can somebody help me, how can i design a mat foundation that is circular in shape 20 meters diameter with 12 columns on outside perimeter of 8.8 meters radius and another 12 inner columns on 3.8 meters radius from center.the usual mat footing i've encounter are rectangular in shape .
help would be appreciated very much.
thanks,
041964

hi 041964,
circular mat foundations are covered in ch.32 of "structural engineering handbook 4th ed." by gaylord & gaylord.
regards
vod