Serviceability limit state - Eurocodes

Effects of local yielding on deflections
G. Hanswille
Univ.-Prof. Dr.-Ing.
Institute for Steel and
Composite Structures
University of Wuppertal-Germany
For the calculation of deflection of un-propped beams, account may
be taken of the influence of local yielding of structural steel over a
support.
For beams with critical sections in Classes 1 and 2 the effect may be
taken into account by multiplying the bending moment at the support
with an additional reduction factor f 2 and corresponding increases are
made to the bending moments in adjacent spans.
f 2 = 0,5 if f y is reached before the concrete slab has
hardened;
f 2 = 0,7 if f y is reached after concrete has hardened.
This applies for the determination of the maximum deflection but not
for pre-camber.
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