Difference in PSC check and envelop load value.

V_ed range is from 21582kN to 25474kN (i notice the Type is FX min/max, not the FZ ???)

But the envelop of shear load for member 17 is 

shear -Z show max value is 36986kN, which is much biger than 25474kN.

I attach the model in here for your review.

However, particularly for design shear force only, practically engineers reduce the acting force in accordance to the acting tendon primary.  If this isn't done, the sections are very conservative for shear design.  Now, we do not select tendon primary for ULS load combination.  Hence, when checking the shear force from the result table, the effect of tendon primary wouldn't be reflected in the combination.  But, when checking from design result tables, the acting shear force is reduced in accordance to component of the tendon primary and hence this would be lesser.  For verification purpose, kindly check a simple model with a straight tendon.  In this case, since prestress wouldn't have any vertical component, the shear forces would be comparable.

A sample model is attached herewith for your quick review.  Kindly let us know if further assistance would be required.

Regards,
Nandeep
Technical Manager, MIDAS

Sincere thank,