Dears;
I had a problem in a MAT foundation which is; in a part of the Mat there are two high loaded columns , that create a problem of Punching.
But I cant go in depth of the Mat, so I suggest to enlarge the column neck( The column between the slab on grade and the Mat) which is 0.5 meter in height. That solved the problem.The following questions now I have :
a. Do u agree with me????
b. I didn't design this part of column instead I reinforced it as the steel ratio of the above column. The reason that I didn't design it , is that I enlarge it around the center of the above column so no eccentricity . Do u agree??
c. And how about if it was enlarged eccentrically, Shall I add the Moment from eccentricity to the moment from analysis of the bottom of the above column and design this neck??