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Design of concrete column
based on
EC2
Swedish Annex
Section
h
w
=
mm
b
w
=
mm
Diameter
d
sl
:
Ø
12
16
20
25
28
mm
d
st
:
Ø
6
8
10
12
mm
Effective length
l =
m
a)
b)
c)
d)
e)
f)
g)
Cover
XC1
Manual calculation
c
v,1
=
mm
c
v,2
=
mm
c
v,3
=
mm
c
v,4
=
mm
Max vct
ekv
:
=0,90
=0,60
Life class :
L20
L50
L100
c
v,1
=
20
mm
c
v,2
=
20
mm
c
v,3
=
20
mm
c
v,4
=
20
mm
2nd order momentcalculation
Stiffness method
Curvature method
Settings
: A
st,min
α
cc
:
0.85
0.90
0.95
1.00
Imperfection
a)
b)
Based on EC2
e
i
=
mm
Effective creep
φ
ef
=
Material
Concrete :
C20/25
C25/30
C30/37
C35/45
C40/50
C45/55
C50/60
f
ck
=
20 MPa
Steel :
K500C-T
K600B-T
f
yk
=
500 MPa
Ultimate loads
N
Ed
=
kN
M
Edy
=
kNm
M
Edz
=
kNm
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Exposure classes according to SS-EN 206-1
Description according to SS EN 206
XC1
XC2
XC3
XC4
XD1
XD2
XD3
XS1
XS2
XS3
Dry or peramnently wet
Concrete inside buildings
with low air humidity
Wet, rarely dry
Concrete surfaces subject to
long-term water contact
Moderate humidity
Concrete inside buildings with
moderate or high air humidity
Cyclic wet and dry
Concrete surfaces subject to
water contact, not within XC2
Moderate humidity
Concrete surfaces exposed to
airborne chloridesr
Wet, rarely dry
Concrete exposed to industrial
waters containing chlorides
Cyclic wet and dry
Parts of bridges exposed to
spray containing chlorides
Exposed to airborne
salt
Structures near to or on the
coast
Permanently
submerged
Parts of marine structures
Tidal, splash and
spray zones
Parts of marine structures
Effective creep coefficient based on EC2 (5.8.4)
Equation
φ
ef
=
φ
(
∞
,t0)
M
0Edqp
M
0Ed
M
0Edqp
=
M
0Ed
Creep coefficient based on EC2
Relative humidity
RH :
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
%
Material
Concrete :
C20/25
C25/30
C30/37
C35/45
C40/50
C45/55
C50/60
Age of concrete at loading
t
0
=
days
Notional size
h
0
=
mm
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