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With rectangular, round and polygon columns, the punching perimeter at the curtain ends is automatically calculated in accordance with TS 500 , taking into account the floor gaps .
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ICONS
A wp = Total cross-sectional area of the vertical punching rebars on the punching circumference
A z = Punching area
b 1 = Punching circumference length in the loading direction
b 2 = Punching circumference length perpendicular to the loading
c (maj) = The center of gravity of the punching area calculated in the moment direction around the strong axis
c (min) = center of gravity calculated in the direction of the moment around the weak axis of the punching area
c ' (maj) =The center of gravity of the punching area calculated in the opposite direction of the moment around the strong axis
c ' (min) = The center of gravity calculated in the opposite direction of the moment around the weak axis of the punching area
d = Slab useful height
D = Strength Excess Coefficient
f ctd = Design tensile strength of concrete
J (maj) = Sum of polar inertia and second moments around the strong axis of the surfaces forming the stapling area (A z )
J (min) = Punching area (A z)) the sum of the polar inertia and second moments around the weak axis of the forming surfaces
M d (maj) = The design moment calculated under the combined effect of vertical loads and earthquake loads on the strong axis of the column and based on the slab punching calculation
M d (min) = In the weak axis of the column, vertical loads and earthquake loads and the design moment based on the slab punching calculation
u p = Punching circumference
V d = Punching force based on the punching calculation
τ pd, 1 = Design-based punching stress
τ pd, 2 =Punching stress based on design
γ v = Coefficient reflecting the shear effect in the punching calculation
γ f = Coefficient reflecting the bending effect in the punching calculation
ρ = Cross section area of the punching reinforcement in the unit area
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By using punching equipment, the punching strength can be increased up to 1.5f ctd or 1.75f ctd as stated above .
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