magnifying punching shear to take into account excentricity

[ramihabchi]

hello,
It is commonly used to multiply column reaction by a factor of:
1.2 for interior columns
1.3 for edge columns
1.4 for corner columns

Could this also be applied to punching shear force to check peripherical sections to avoid calculation of moments on the column(which otherwise are required in ACI to check shear stress)

 

[dik]

I typically used 'real' numbers... axial load and moment.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[ramihabchi]

eurocode 2 gives equation 6.39 for punching shear stress calculation.is it derived mathematically?can I use it with ACI design?

 

[Celt83]

Could this also be applied to punching shear force to check peripherical sections to avoid calculation of moments on the column(which otherwise are required in ACI to check shear stress)

No

can I use it with ACI design?

No

 

[KootK]

I believe that the multipliers that you mentioned are, or were, commonly used in preliminary estimates of the impact of load eccentricity on punching shear estimates. I don't believe that they were ever intended to be used for final design and I would not support their use for final design.

 

[Tomfh]

No, because the moment can make it much worse than that. Moment can reduce punching shear capacity to nothing.

 

[dik]

Ya... use real numbers.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik