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Dear Khalid ! i go through your model and upto my understanding your model is OK but 2 corrections are required. 1) As you mention that the zone of the building is ZONE 3.So you must have to check the Beam Column Joint Ratio which you are saying that it is not done.it is because you have overwrite the sway property from Sway Special to Sway Intermediate.So change your sway type from Sway Intermediate to Sway Special then you will get the required B/C Ratio. 2) In defining the slab you have define slab as a MEMBRANE and membrane takes in-plane stresses only. And in reality the slab also take out of plane stresses by deflecting/bending. So define slab as a SHELL THIN then it will take both in-plane and out-plane stresses. Have a look to the snaps and the model with the two corrections i have made. Sari Pul_V13.rar

ok ignore my comments in post#9. I thought its a big raft. You might need more thickness here (less continuity). Anyway take a screenshot by right clicking on perimeter column showing punching so I can see why it is failing these columns in punching.