Serviceability limit state - Eurocodes

G. Hanswille
Univ.-Prof. Dr.-Ing.
Influence of tension stiffening on flexural stiffness
Institute for Steel and
Composite Structures
University of Wuppertal-Germany
N s
ε sm
Curvature:
z st
a
-M s
-M a
-M
κ
-N a
ε a
κ =
E
st
M
I
2,ts
M
=
a
E J
st
a
Effective flexural
stiffness:
M−
N
=
E J
st
s
a
a
M
EJ
E
st
J
2,ts
=
Ea
Ja
(Ns
− N
1−
M
s, ε
)
a
E st
J 2
E st
J 2,ts
E st
J 1
κ
E st J 1
E st J 2,ts
E st J 2
M R
M Rn
M
E st J 1 uncracked section
E st J 2 fully cracked section
E st J 2,ts effective flexural
stiffness taking into
account tension
stiffening of concrete
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