component method for high strength steel rectangular hollow … · 2019-11-25 · structural...
TRANSCRIPT
Component Method for High Strength Steel Rectangular Hollow Section T Joints
Marsel Garifullin, D.Sc. (Tech.)
Faculty of Built Environment, Tampere University
SCOPE OF RESEARCH 2 / 18
SCOPE OF RESEARCH
brace
chord
weld around
3 / 18
STRUCTURAL ANALYSIS
N0
N0
N Mip Mop
4 / 18
STRUCTURAL ANALYSIS
Load
Deformation
5 / 18
STRUCTURAL ANALYSIS
Load
Deformation
Resistance
5 / 18
STRUCTURAL ANALYSIS
Load
Deformation
Stiffness
5 / 18
STRUCTURAL ANALYSIS
• Eurocode EN 1993-1-8:2005
• AISC Steel Design Guide 24
• AS/NZS 4673
• CIDECT Design Guide No. 3
= + + −−
2
,1, 0 0 1 5
1 2/
2 11ip Rd n y M
ηM k f t h γ
η ββ
6 / 18
Chord face failure Chord side wall failure Chord shear failure
Punching shear Brace failure Local buckling
FAILURE MODE APPROACH 7 / 18
Chord face failure Chord side wall failure Chord shear failure
Punching shear Brace failure Local buckling
FAILURE MODE APPROACH 7 / 18
Chord face failure Chord side wall failure Chord shear failure
M 1 = 26.3 kNm M2 = 19.6 kNm M3 = 45.8 kNm
FAILURE MODE APPROACH 7 / 18
Chord face failure Chord side wall failure Chord shear failure
M 1 = 26.3 kNm M2 = 19.6 kNm
Joint resistance
M3 = 45.8 kNm
FAILURE MODE APPROACH 7 / 18
FAILURE MODE APPROACH
bird-beak joint end-plate joint cleat joint column base
8 / 18
COMPONENT METHOD
zero
distance
zop
zip
9 / 18
,
4
4
Rd Rd
j ini eq
N F
C Ek
=
=
FRd, keq
a) chord face in bending
b) chord side walls in tension / compression
c) chord side walls in shear,
d) chord face under punching shear
e) brace flange / webs in tension / compression
f) chord section in distortion
g) welds
COMPONENT METHOD
chord axis
Mop,Rd, Sj,ini,op
rigid beam
Mip,Rd, Sj,ini,ip
NRd, Cj,ini,N
brace axis
10 / 18
INFLUENCE OF FILLET WELDS 11 / 18
INFLUENCE OF FILLET WELDS 11 / 18
0
10
20
30
40
50
0,0 0,1 0,2 0,3
M[k
Nm
]
φ [rad]
a10
a6
1/2v
INFLUENCE OF FILLET WELDS 11 / 18
0
10
20
30
40
50
0,0 0,1 0,2 0,3
M[k
Nm
]
φ [rad]
a10
a6
1/2v
Eurocode
INFLUENCE OF FILLET WELDS 12 / 18
.
.
→ = +
→ = +
eq w
eq w
b b b a
h h h a
1 1
1 1
1 13
1 13
Ultra high strength steels
(UHHS)
High strength
steels (HSS)Regular steels
HIGH STRENGTH STEEL 13 / 18
Design rules
S355 S460 S550 S700 S900 S1100
S355 S460 S550 S700 S900 S1100
Ultra high strength steels
(UHHS)
High strength
steels (HSS)Regular steels
HIGH STRENGTH STEEL 13 / 18
Design rulesReduction
factor 0.9
S355 S460 S550 S700 S900 S1100
S355 S460 S550 S700 S900 S1100
Ultra high strength steels
(UHHS)
High strength
steels (HSS)Regular steels
HIGH STRENGTH STEEL 13 / 18
Design rulesReduction
factor 0.9
Reduction
factor 0.8
S355 S460 S550 S700 S900 S1100
S355 S460 S550 S700 S900 S1100
Ultra high strength steels
(UHHS)
High strength
steels (HSS)Regular steels
HIGH STRENGTH STEEL 13 / 18
Design rulesReduction
factor 0.9No design rules
Reduction
factor 0.8
S355 S460 S550 S700 S900 S1100
S355 S460 S550 S700 S900 S1100
HIGH STRENGTH STEEL 14 / 18
Jointb0
[mm]
h0
[mm]
t0
[mm]
b1
[mm]
h1
[mm]
t1
[mm]β
Chord
Steel
Brace
Steel
aw
[mm]aw /aw,fs
S420_S420_a6
150 150 8
100 100 8 0.67 S420 S420
6
0.51
S500_S420_a6 100 100 8 0.67 S500 S420 0.51
S500_S500_a6 100 100 8 0.67 S500 S500 0.47
S700_S420_a6 100 100 8 0.67 S700 S420 0.51
S700_S500_a6 100 100 8 0.67 S700 S500 0.47
S700_S500_a6_WiPF 100 100 8 0.67 S700 S500 0.47
S700_S700_a6 120 120 8 0.80 S700 S700 0.45
S420_S420_a10
150 150 8
100 100 8 0.67 S420 S420
10
0.84
S500_S420_a10 100 100 8 0.67 S500 S420 0.84
S500_S500_a10 100 100 8 0.67 S500 S500 0.78
S700_S420_a10 100 100 8 0.67 S700 S420 0.84
S700_S500_a10 100 100 8 0.67 S700 S500 0.78
S700_S500_a10_WiPF 100 100 8 0.67 S700 S500 0.78
S700_S700_a10 120 120 8 0.80 S700 S700 0.76
S420_S420_1/2v
150 150 8
100 100 8 0.67 S420 S420
butt -
S500_S420_1/2v 100 100 8 0.67 S500 S420
S500_S500_1/2v 100 100 8 0.67 S500 S500
S700_S420_1/2v 100 100 8 0.67 S700 S420
S700_S500_1/2v 100 100 8 0.67 S700 S500
S700_S700_1/2v 120 120 8 0.80 S700 S700
HIGH STRENGTH STEEL 14 / 18
Jointb0
[mm]
h0
[mm]
t0
[mm]
b1
[mm]
h1
[mm]
t1
[mm]β
Chord
Steel
Brace
Steel
aw
[mm]aw /aw,fs
S420_S420_a6
150 150 8
100 100 8 0.67 S420 S420
6
0.51
S500_S420_a6 100 100 8 0.67 S500 S420 0.51
S500_S500_a6 100 100 8 0.67 S500 S500 0.47
S700_S420_a6 100 100 8 0.67 S700 S420 0.51
S700_S500_a6 100 100 8 0.67 S700 S500 0.47
S700_S500_a6_WiPF 100 100 8 0.67 S700 S500 0.47
S700_S700_a6 120 120 8 0.80 S700 S700 0.45
S420_S420_a10
150 150 8
100 100 8 0.67 S420 S420
10
0.84
S500_S420_a10 100 100 8 0.67 S500 S420 0.84
S500_S500_a10 100 100 8 0.67 S500 S500 0.78
S700_S420_a10 100 100 8 0.67 S700 S420 0.84
S700_S500_a10 100 100 8 0.67 S700 S500 0.78
S700_S500_a10_WiPF 100 100 8 0.67 S700 S500 0.78
S700_S700_a10 120 120 8 0.80 S700 S700 0.76
S420_S420_1/2v
150 150 8
100 100 8 0.67 S420 S420
butt -
S500_S420_1/2v 100 100 8 0.67 S500 S420
S500_S500_1/2v 100 100 8 0.67 S500 S500
S700_S420_1/2v 100 100 8 0.67 S700 S420
S700_S500_1/2v 100 100 8 0.67 S700 S500
S700_S700_1/2v 120 120 8 0.80 S700 S700
HIGH STRENGTH STEEL 15 / 18
4
6
8
10
12
14
0,3 0,4 0,5 0,6 0,7 0,8 0,9
Mn
orm
β
Eurocode
S420 S500 S700
Eurocode 0.9 0.8 0.8
Proposal, butt welds 0.9 0.8 0.8
Proposal, fillet welds 1.0 1.0 0.9
SURROGATE MODELLING 16 / 18
SURROGATE MODELLING 16 / 18
-1,5
-1,0
-0,5
0,0
0,5
1,0
1,5
2,0
-0,5 1,5 3,5 5,5 7,5 9,5
y=
f(x
)
x
SURROGATE MODELLING 16 / 18
-1,5
-1,0
-0,5
0,0
0,5
1,0
1,5
2,0
-0,5 1,5 3,5 5,5 7,5 9,5
y=
f(x
)
x
SURROGATE MODELLING 16 / 18
-1,5
-1,0
-0,5
0,0
0,5
1,0
1,5
2,0
-0,5 1,5 3,5 5,5 7,5 9,5
y=
f(x
)
x
Variables
b0 2γ = b0/t0 β = b1/b0 φ
SURROGATE MODELLING 17 / 18
3
5
7
9
11
13
100 140 180 220 260 300
t 0[m
m]
b0 [mm]
Sampling
SURROGATE MODELLING 17 / 18
3
5
7
9
11
13
100 140 180 220 260 300
t 0[m
m]
b0 [mm]
Sampling FE simulations
SURROGATE MODELLING 17 / 18
3
5
7
9
11
13
100 140 180 220 260 300
t 0[m
m]
b0 [mm]
S[k
Nm
/rad
]
Sampling FE simulations Surrogate model
FUTURE RESEARCH 18 / 18
Mop
out-of-plane bending
FUTURE RESEARCH 18 / 18
Mop
out-of-plane bending K joint KT joint