Mechanical reinforcement ratio - design

Mechanical reinforcement ratio depends on required or provided reinforcement. For design area of reinforcement is calculated from designed required and provided reinforcement. The mechanical reinforcement ratio is calculated according to formula below. The mechanical reinforcement can be different along whole length of the column and in each section of the member and it is calculated according to formula below

ω = ∑(A_s,i ∙ f_yd) / (A_c ∙ f_cd)

where

As,i	cross-sectional area of i-th reinforcement in the cross-section of current section calculated from required or provided reinforcement
fyd	design yield strength of reinforcement loaded from Project setting or concrete member data, if are defined
Ac	cross-sectional area of concrete cross-section
fcd	design value of concrete compressive strength

The coefficient B is than calculated according to formula:

B = √(1 + 2 ∙ ω)