Serviceability limit state - Eurocodes
Serviceability limit state - Eurocodes
Serviceability limit state - Eurocodes
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Effects of cracking of concrete and tension<br />
stiffening of concrete between cracks<br />
G. Hanswille<br />
Univ.-Prof. Dr.-Ing.<br />
Institute for Steel and<br />
Composite Structures<br />
University of Wuppertal-Germany<br />
N s<br />
N sy<br />
mean strain ε sm<br />
=ε s,2<br />
- βΔε s,r<br />
Δε<br />
s<br />
f<br />
= β<br />
ρ<br />
β =0,4<br />
ct,eff<br />
s<br />
E<br />
s<br />
σ c<br />
(x)<br />
σ s<br />
(x)<br />
σ c<br />
(x)<br />
τ v<br />
σ s,2<br />
Δεs = βΔε s,r<br />
ρ<br />
s<br />
= A<br />
s<br />
/ A<br />
c<br />
σ c<br />
(x)<br />
N sm<br />
Δε s,r<br />
fully<br />
cracked<br />
section<br />
ε sr,1<br />
ε sr,2<br />
ε sm,y<br />
ε sy<br />
N s<br />
ε<br />
ε<br />
s,2<br />
σ s<br />
(x)<br />
σ<br />
=<br />
E<br />
s2<br />
s<br />
N s<br />
N s,cr<br />
B C<br />
A<br />
stage A:<br />
stage B:<br />
stage C:<br />
uncracked section<br />
initial crack formation<br />
stabilised crack formation<br />
ε sm<br />
f<br />
E<br />
ct<br />
c<br />
ε s(x)<br />
ε c(x)<br />
βΔε s,r<br />
x<br />
13
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