flowchary composite simply supported beam
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End
Bending criterion verified ?
Calculate internal forces and moments
Verification of bending resistance
Span LengthLoad combination
This chart covers the choice of beam section and verification of the design resistance of a simply supported composite beam under uniform loading.
Flowchart: Design of a simply supported composite beam - Details
Start
VEd, MEd
Choose beam section,concrete parameters,
connectors
Calculate Effective width of concrete flange
EN 1994 1-1 § 5.4.1.2
Calculate connectors design resistance
EN 1994 1-1 § 6.6.4
PRd
Cross section dataSteel grade
Connectors data
beff
VRd
Yes
VEd ≤ VRd
No
No
Verification of longitudinal shear resistance of the slab
Longitudinal shear criteria verified ?
Yes
Yes
No
Calculate Shear Resistance
When the beam is not fully propped during construction, it has also to be checked without the contribution of the concrete slab
EN 1994 1-1§ 6.6.6.2
EN 1994 1-1 § 6.6.3
Flowchart: Design of a simply supported composite beam - Details
SF004a-EN-EU
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Flowchart: Design of a simply supported composite beam - DetailsC
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Verification of bending resistance
Class of cross-section
Start
, min
EN 1994 1-1§ 6.6.1.2
Class1 or Class 2 ?
≥ min
Yes
Calculate plastic resistance moment
Yes
Mpl,Rd
Return
EN 1994 1-1 § 6.2.1.2
Calculate stresses in steel and concrete flanges
No
No
fs, fi, c
Return
EN 1994 1-1§ 6.2.1.5
Classification of cross sectionCross section data
Steel gradeConnectors data
EN 1994 1-1§ 5.5
Calculate degree of shear connection and
minimum degree of shear connection min
MEd ≤ Mpl,RdBending resistance criteria not verifiedNo
Bending resistance criteria verified
Yes
Bending resistance criteria verified
Bending resistance criteria not verifiedCriteria verified ?
Yes
No
Bending resistance criteria:fs ≤ fyd = fy / M
fi ≤ fyd = fy / M
c ≤ fcd = fck / c
EN 1994 1-1§ 2.4.1.2
EN 1994 1-1§ 6.2.1.5
EN 1994 1-1 § 6.2.1.3
Flowchart: Design of a simply supported composite beam - Details
SF004a-EN-EU
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Flowchart: Design of a simply supported composite beam - DetailsC
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Vertical Shear resistance
Calculate Shear resistanceUsing VRd = Vpl,Rd
Calculate Shear buckling resistance
Using VRd = Vb,Rd
EN 1994 1-1 § 6.2.2.2
EN 1994 1-1§ 6.2.2.3
VRd
hw / tw ≤ 72 /
Start
Return
Yes
NoCross section data
EN 1993 1-5 § 5.1
EN 1993 1-5 § 5
Flowchart: Design of a simply supported composite beam - Details
SF004a-EN-EU
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Flowchart: Design of a simply supported composite beam - DetailsC
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ruar
y 24
, 201
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right
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. Use
of t
his
docu
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subj
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o th
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rms
and
cond
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the
Acc
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Ste
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Verification of longitudinal shear resistance of the slab
Start
Bending verification with plastic resistance ?
Return
EN 1992 1-1§ 6.2.4
Calculate elastic longitudinal shear stresses in potential surfaces of
failure
EN 1992 1-1§ 6.2.4
Calculate plastic longitudinal shear stresses in potential surfaces of
failure
Yes
No
vEd
EN 1992 1-1§ 6.2.4
Bending verification with plastic resistance if
cross section is of Class 1 or 2and > min
(see page 2)
vEd ≤ fcd sin f cos f
Longitudinal shear criterion verified
Longitudinal shear criterion not verifiedNo
Yes
Flowchart: Design of a simply supported composite beam - Details
SF004a-EN-EU
4
Flowchart: Design of a simply supported composite beam - DetailsC
reat
ed o
n W
edne
sday
, Feb
ruar
y 24
, 201
0T
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mat
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copy
right
- a
ll rig
hts
rese
rved
. Use
of t
his
docu
men
t is
subj
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o th
e te
rms
and
cond
ition
s of
the
Acc
ess
Ste
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RESOURCE Title
Reference(s)
Flowchart: Design of a simply supported composite beam - Details
15/03/2005Pierre-Olivier MARTIN
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18/07/06G W Owens SCI
5. Spain 30/06/05J Chica Labein
Flowchart: Design of a simply supported composite beam - Details
SF004a-EN-EU
5
Flowchart: Design of a simply supported composite beam - DetailsC
reat
ed o
n W
edne
sday
, Feb
ruar
y 24
, 201
0T
his
mat
eria
l is
copy
right
- a
ll rig
hts
rese
rved
. Use
of t
his
docu
men
t is
subj
ect t
o th
e te
rms
and
cond
ition
s of
the
Acc
ess
Ste
el L
icen
ce A
gree
men
t