PSI - Issue 70

Saravanakumar P. et al. / Procedia Structural Integrity 70 (2025) 533–539

536

Fig. 2. Reinforcement detailing of beam

6. Impact of varying stirrups on Shear and flexure The calculation of beam shear follows the relation specified in ACI 318-11[2] Ø V n ≥ V u

Here, V u represented the factored shear force of the beam at the considered section, and V n is the nominal shear strength. The nominal shear strength (V n ) is the sum of the nominal shear strength provided by the concrete (V c ) and the shear reinforcement (V s ). The nominal shear strength of the concrete V c is determined by the following relation: V c = 0.17 λ√fcꞌ b w d Here b w and d are the section dimensions, and for normal weight concrete λ=1.0. when the shear reinforcement is perpendicular to the axis of the member, V s =A v f y d/s and when the shear reinforcement is inclined to the axis of the member, V s = A v f y (sinα = cosα) d/s. In these equations, A v represents the area of on stirrup α is the angle of the stirrup with the horizontal and s is the stirrup spacing. Table 3. Ultimate Load and First Crack Load

Specimen

Ultimate Load

Ultimate Stress Cracking Load

Cracking Stress