Vu = 280 Kn From StaadMu= 0 Kn-m From Staad ( optional )

Section PropertiesWidth b = 300 mmHeight h = 600 mmEffective Depth d = 515 mmArea of 2-leg Stirrup Av = 157 mm^2 2* Bar AreaDia of bar used Bar Dia used 10

Material & Design Inputfc' = 28 MpaFy = 420 Mpa 0.75

Design

Vc-1= 104.2 Kn Vc-1 = x0.17xfc^0.5*b*d ( ACI-11.2.1.1)

#DIV/0! Kn Vc-2 = (0.16* *fc^0.5+ 17 *s*( Vu*d/ Mu) ) *b*d ( ACI-11.2.2.1)

Vc-2 < Vc-2 max ( ACI-11.2.2.1)

s = Av / (b*d) (Vu* d)/Mu = #DIV/0!s = 0.001016 max (Vu* d)/Mu = 1

To be used (Vu* d)/Mu = #DIV/0!

Vc-2 = #DIV/0! kn

Vc-2 max =( 0.29**fc^0.5*b*d) ACI-11.2.2.1) Vc-2 max 177.8 Kn

Vc= 104.2 Kn Vc-1 Governs

Check 1 Vu 280 ( ACI-11.4.6.1)Vc/2 52.1 Vu > (Vc/2) =Stirrups Req

Vu < (Vc/2) = No Stirrups Req

Vs = 234.4 Kn ( ACI-11.1)Vs = (Vu-Vc)/

Check 2 ( ACI-11.2.1.1)Vs > Vs max = Section Ok

Vs max = x0.66xfc^0.5*b*d Vs < Vs max = Increase SectionVs max = 404.7 Kn

Spacing

S Req = 144 mm ( ACI-11.4.7.2)S=( Av*Fy*d)/Vs

Governing Spaces Vs = 234.4 kn =0.33*fc^0.5*b*d 202.4 kn

Smax= 257.5 mm ( ACI-11.4.5.1)Smax= 600 mm ( ACI-11.4.5.1)

Smax= 128.8 mm ( ACI-11.4.5.1)Smax= 300 mm ( ACI-11.4.5.1)

Seismic Provisions ( For Intermediate Moment Frame ) ( ACI-21.3.4)

For Stirrups ( ACI-21.3.4.3)D/2 257.5 mm

Governing Space 128

Area & Spcaing Req.128 144

Av min-1=( 0.062*Fc^0.5*b*s)/fyt ( ACI-11.4.6.3) Av min-1= ( 0.062*Fc^0.5*b*s)/fyt30.00 mm^2 33.74 mm^2

Av min-2=( 0.35*b*s)/fyt ( ACI-11.4.6.3) Av min-2= ( 0.35*b*s)/fyt32.00 mm^2 36.00 mm^2

Av min to be used= 30.0 mm^2 Av min to be used= 33.7 mm^2

128Av min-1=( 0.062*Fc^0.5*b*s)/fyt ( ACI-11.4.6.3)

30.00 mm^2

Av min-2=( 0.35*b*s)/fyt ( ACI-11.4.6.3)32.00 mm^2

Av min to be used= 30.0 mm^2

if Spacing =

Av min-1=

Av min-2=

Shear Design of Beam (ACI-318-08)

Dont Use this

Limitation of 2nd Formula =

Minimum of Vc-1 , Vc-2, If Moment value is not entered than only Vc-1 will be used , Permitted b y ACI

Section is ok

S if Av used

Shear Strength provided by Shear Reinforcement

(Vc+Vs) Vu

Av min-1=

Av min-2=

Av min-1=

Av min-2=

Use 10 @ 128 mm

Shear Strength provided by Concrete-1

Shear Strength provided by Concrete-2

Shear Strength provided by Concrete

Stirups req

if Spacing = if Spacing =

use this

Note : Shear Strength provided by Concrete is calcuated by Two Formulas Given by ACI while 1st Formula is General and mostly used and 2nd formula is for Detailed calculation

Note : 2nd formula uses Mu value, and its optional

Vc-2 to be used=

Vs > 0.33*fc^0.5*b*d( ACI-11.4.5.3)

Vs < 0.33*fc^0.5*b*d( ACI-11.4.5.3)

Shear Design of Beams