Question

As per IS 456-2000, in the Limit State Design of a flexural member, the strain in reinforcing bars under tension at ultimate state should not be less than

• A. $\frac{f_y}{E_s}$
• B. $\frac{f_y}{E_s}+0.002$
• C. $\frac{f_y}{1.15E_s}$
• D. $\frac{f_y}{1.15E_s}+0.002$

Answer 1

The correct option is D $\frac{f_y}{1.15E_s}+0.002$

According to IS 456 : 2000
The maximum strain in the tension reinforcement in the section at failure shall not be less than
$\frac{f_y}{1.15E_s}+0.002$

where,

$f_y=\text{characteristic strength of steel}$
$E_s=\text{Modulus of elasticity of steel}$