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Showing results for tags 'punching'.
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when ever I draw model on safe v.8. If punching shear ratio of raft foundation exceed. for example: If punching ratio of column on raft foundation 30" thick is 1.6, then I draw an other 10'x10' slab with same property in 30" thick raft with 33" on that particular column which have punching ratio 1.6. It wil come to 1.3 punching ratio.. then 36" and 39", after that punching ratio will come below 1. But when ever I remove 30" thick raft on that column then draw only 39" thick raft, i am facing same punching ratio problem. I did'nt understand what criteria SAFE is following..
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Dear all, Overall raft slab is 36" thick and i want to thicken raft upto 48" under the columns in order to control punching. So what is the correct way to model the extra 12" thickness under Columns in SAFE (See the attached Pic.) Option 1 : raft slab of 36" thick with MAT property and 48" thick slab with DROP property. Option 2 : raft slab of 36" thick with MAT property and 12" thick slab with DROP property and adjust the 12"thick drop slab level by using offset command. Then assign Subgrade modulus to both Raft slab and drop slab. Thanks.
