Which of the following correctly represents the concrete contribution to shear strength V in Limit State Method (LSM) design? c
V is calculated based on concrete grade (f ) c ck
As per IS 456:2000 Limit State Method for shear design:
- Design shear strength of concrete (τc) depends on: (1) percentage of tensile steel (pt = 100Ast/bd) and (2) concrete grade (fck)
- Values of τc are given in Table 19 of IS 456, which varies with both pt and concrete grade
- If applied shear stress τv < τc: No shear reinforcement needed
- If τv > τc: Shear links/stirrups designed for (Vu − Vc)
Vc is NOT neglected entirely (it's a significant contribution) and is NOT equal to total shear force.
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