I am running into some problems with punching at corner columns. My software designs for the maximum shear stress at a point due to biaxial bending. ACI 421.1 suggests that this may be overly conservative due to stress redistribution. They recommend designing for vu at a distance 0.4d from the...
Section 11.5.3. of ACI 318 specifies the valiable "d" in prestressed members to be a minimum 0.8*h. In punching checks, if you elect NOT to design per 11.12.2.2 (which includes of the tendon component in the shear capacity), and instead use the typical 4rt(f'c)bd, would it be appropriate to...