Section 8.6.2.2 Modulus of Elasticity of Concrete E_c

The modulus of elasticity of concrete E_c calculated using equation 8-1.

E_{c} = (3, 300 \sqrt{{f^{'}}_{c}} + 6, 900) {(\frac{γ_{c}}{2, 300})}^{1.5}

For sections with multiple values of strengths, the minimum concrete strength is used to determine the limiting stress.

The specified density γ_c is used in the equation, but if outside the range of 1,500 and 2,500 kg/m³ a warning will be reported.

Alternatively, E_c can be specified directly.

Section 8.6.2.2 Modulus of Elasticity of Concrete Ec