Two way solid slab

[MUHANNAD.ABU_ABDO]

When i model two way solid slab .. to compare robot results with manual calcuations , there's some strange results ?!

1- why is robot locked the concrete options by default and can't determine the concrete strength as i want ?
2-the results of punching shear it's not matched with manual calculation and SAFE results .. but the results it's not too large as robot !
3- if the value of punching about 1.1 or 1.2 .. can i ignore it or i can't ?
4- what about panel cuts to match it with column strip and middle strip

thanks in advance

[Artur.Kosakowski]

1- why is robot locked the concrete options by default and can't determine the concrete strength as i want ?

My assumption is that you refer to the provided reinforcement module. If so, then concrete grade cannot be changed and is the same as you used for provided reinforcement calculations for this panel and this is where you can change it. 

2-the results of punching shear it's not matched with manual calculation and SAFE results .. but the results it's not too large as robot !

You may want to look at:

http://forums.autodesk.com/t5/robot-structural-analysis/punching-shear-check/m-p/3839964

http://forums.autodesk.com/t5/robot-structural-analysis/punching-shear-verification/m-p/3729432

3- if the value of punching about 1.1 or 1.2 .. can i ignore it or i can't ?

Qadm should be equal or larger than Q

4- what about panel cuts to match it with column strip and middle strip

Please check:

http://forums.autodesk.com/t5/robot-structural-analysis/strip-method/m-p/4923878

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