additional punching shear due to unbalanced moment

[h-badawy]

dear experts

regarding to the additional punching shear due to unbalanced moment,
are the finite elements programs(sap,etab or safe) taken into considerations the effect of the unbalanced moment during analysis or i have to use the ACI methods (EFM or DDM) to get this moment, because when i am checking the punching i get the normal force and moment from the columns and use any spread sheet to check. but if the normal force from the finite elements programs included the additional shear due to unbalanced moment the loads will be duplicated .

Thank you

 

[PicoStruc]

Only SAFE check two-way shear action automatically for suspended slab.

 

[h-badawy]

thnx PicoStruc
but if u see the how the safe check the punching shear u will find the moments in two directions Mu2 and Mu3 have been taken into consideration with the shear force so the shear force haven't been increased due to unbalanced moment.
check the attachment

Thank you

 

[PicoStruc]

In SAFE2014, MU2 and MU3 are unbalanced moment. Multiply these moment by their respective gamma factor to obtain portion of moment transfered by shear.

 

[h-badawy]

after study the CSi program (safe) Manuel , check of punching have been done by basic code method by take the full moment transfer and multiplied by (gamma V) and get the stress from (Q and M) but i found anther method i think it may be better and accurate by the finite element , if we get the stresses (S13 & S23 ) on d/2 from the face of the columns and these values already included the the effect of (Q and M) and it should be less than Vc .

note :
S13: Out-of-plane shearing stress (force per unit area) acting on the positive and negative 1 faces in the 3-axis direction.
S23: Out-of-plane shearing stress (force per unit area) acting on the positive and negative 2 faces in the 3-axis direction.

check attachment

Thank you