Is the punhing shear verfication by checking the principal shear strees in maps gives the same results of verfication punching by rc slab provided reinforcement .
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These results are different mainly because the design code tells you how to determine the critical perimeter whereas the stress is displayed in a selected position within a slab.
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What i was mean by my Question is
if we take the reading of shear stresses after check the reduced forces above columns support at the same distance from the face of the column permitted in the code is this value from the maps will be the same or closed to the value calculated in rc slab provided reinforcement in the punching check .
What i know : in the calculation of shear stresses in the map
the formula is ;
T= Q*S/B*I which is mean the the unbalanced moment which is going to the columns is not considered .
But for the calculation of shear stresses in rc slab provided reinforcement whis is according to the used code is ;
T = Q/b*d + Mux*y/Jx +Muy * x/Jy
which is mean the unbalanced moment taken in consideration Of the shear stress as per code parametes but didnt taken in consideration in the map result .
kindly confirm if this understanding is correct .
The valued on the map are calculated based on the shear force only with no influence of bending.