Distance of the tension reinforcement from the extreme fibre of the cross-section (m): d2 = 0.05 m Effective depth of a cross-section ( m): d = h d2
d = 0.7 m
Bending moment at the section( MN m): Ms = 0.15 MN m
Axial external load at the section ( MN):
Ns = 0.60 MN
Combined actions have to be transformed in relation to the centre of gravity of the tension reinforcement ( MN m):
Ms
M = Ns
Ns
d
h
2
M = 0.345 MN m
Limiting values for the related neutral axis depth:
α=
90 M 2
b d σsall
1α 3α
α = 0.40957
Figure I. 4