Web Reinforcement for Shear

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Input Data:Pe,L,h,e,fc,fy.fpu,DL,LL

Mcr = Shear Force at which the flexure-shear cracks occurred;Vci = 0.6 bwd + Vo + (Mrc)Compute for fiber stress due to the load above.f2,O = Compute for Moment and Shear at the Section due to beam load alone.Bottom Fiber Stressf2PE =

Compute the tendon eccentricity of the trial section.

Then applied to establish a maximum spacing criterion;Av = Compute for Spacing:S1 =Lowest Shear Force will govern and used it as Vc.Shear Force at which web-shear cracks occurred;Vcw = (3.5 + 0.3 fpc) bwd + Vp

Other criteria for maximum spacing is;S3 = 0.75hS4 = 24 in

Lowest value of spacing will adopt.

Adopt the lowest spacing.Compute for Spacing:S1 =Limits are reduced by half.NoYesVs = < 4 bwd

Lowest Spacing will adopt.

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