Punching Check.xlsx

PUNCHING CHECK COLUMN TYPE CIRCULAR General data: fck =

40 N/mm2

fy = 500 N/mm2 Dia of column, dia = 2000 mm -1600 -Depth of slab, d1 = 750 mm Depth od pedestal/drop, d2 = 750 mm total depth of critical section, d1 + d2 = 1500 mm effective cover, d' = 75 mm Effective depth, d = 1425 mm width of perimeter, L22 = 3425 mm length of perimeter, L33 = 3425 mm perimeter, qo = pi x dia = 10759.95 mm Load data: Shear force, Vu = Unbalanced moment, Mu2 = Unbalanced moment, Mu3 =

18446.66 kN 3034.48 kNm 1287.33 kNm

Punching Shear stress calculaion: Vu/(qo x d) =

1.203 N/mm2

Mu2/(L2 2* L33) =

0.182 N/mm2

Mu3/(L2 2* L33) =

0.077 N/mm2

Total shear stress =

1.462 N/mm2

Punching Shear capacity: β =L2/L3 = Ks 0.5+β = vu Ks x 0.25√fck = Demand / capacity ratio for punching =

1.0 1.5 or 1.0 whichever is less 1.581 N/mm2 0.92 < 1.0 Hence OK