Question

In limit state method of design, the value of permissible shear stress in concrete when shear reinforcement is not provided is
1. 0.16(f_ck)^½
2. 0.25(f_ck)^½
3. 0.34(f_ck)^½
4. 0.48(f_ck)^½

Answer 1

Correct Answer - Option 2 : 0.25(f_ck)^½

Explanation:

(i) As per CI. 31.6.3.1. of IS 456:2000, When shear reinforcement is not provided. the calculated shear stress at the critical section shall not exceed k_s τ_c

Where K_s = (0.5 + β_c) ≤ 1, β_c being the ratio of short side to long side of the column and τ_c = 0.25√f_ck ib limit state method of design, and 0.16√f_ck in WSM