7/23/2019 Punch Chk for Ftg

http://slidepdf.com/reader/full/punch-chk-for-ftg 1/2

CHECK FOR PUNCHING SHEAR STERESS change only green spots

kg / s!c" #pa N/s!""

 allowable punching units allowable punching

shear stress =va 1.06(fc')^0.5 kg / s.c! shear stress =va srt fc'/" #/s.!!

fc' = $%0 kg / s.c! fc' = "00 #/s.!!

& fc' = 16.*" & fc' = 1*."$

va = 1.06+(& fc') va = & fc'/"

va = 1*.*, kg / s.c! va = 5.** #/s.!!

 eff. -epth of slab -s = 1"$.5 c! eff. -epth of slab -s = 10 !!

colu!n -i! = 60 c! colu!n -i! = ,00 !!

colu!n -i! 2 = 1$0 c! colu!n -i! 2 = ,00 !!

shear peri!eter b0 = $ (3 -s 3 2 3-s) c! shear peri!eter b0 = $ (3 -s 3 2 3-s) !!

at a -ist of -/$ at a -ist of -/$

b 0 = %0 c! b 0 = $"60 !!

shear area = b0 -s s.c! shear area = b0 -s s.!!

= 11*$5 s.c! = ,,%,00 s.!!

allowable punching &.4 = a = shear area va allowable punching &.4 = a = shear area va

= $0165% kg = $5%%%" #ewtons

a = $01.66 tons a = $5%%.%, k#s

n = 0.%5 u n = 0.%5 u

a n 78&& a n 78&&

a9 n 48:; a9 n 48:;

7/23/2019 Punch Chk for Ftg

http://slidepdf.com/reader/full/punch-chk-for-ftg 2/2

CHECK FOR PUNCHING SHEAR STERESS change only green spots

kg / s!c" #pa N/s!""

 allowable punching units allowable punching

shear stress =va 1.06(fc')^0.5 kg / s.c! shear stress =va srt fc'/" #/s.!!

fc' = ,00 kg / s.c! fc' = ,0 #/s.!!

& fc' = $0.00 & fc' = 6."$

va = 1.06+(& fc') va = & fc'/"

va = $1.$0 kg / s.c! va = $.11 #/s.!!

 eff. -epth of slab -s = 11$.5 c! eff. -epth of slab -s = 11$5 !!

colu!n -i! = 60 c! colu!n -i! = 600 !!

colu!n -i! 2 = 1$0 c! colu!n -i! 2 = 1$00 !!

shear peri!eter b0 = $ (3 -s 3 2 3-s) c! shear peri!eter b0 = $ (3 -s 3 2 3-s) !!at a -ist of -/$ at a -ist of -/$

b 0 = %10 c! b 0 = %100 !!

shear area = b0 -s s.c! shear area = b0 -s s.!!

= 11$5 s.c! = 11$500 s.!!

allowable punching &.4 = a = shear area va allowable punching &.4 = a = shear area va

= 1"1%50 kg = 1$10%"* #ewtons

a = 1"1.%5 tons a = 1$10.%, k#s

n = 0.%5 u n = 0.%5 u

a n 78&& a n 78&&

a9 n 48:; a9 n 48:;