plate girders fabricated by single sided fillet weld
TRANSCRIPT
Plate girders fabricated bysingle sided fillet weld:
imperfections, tests, resistances
Dunai László, ProfessorJakab Gábor, Assistant professor
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Specimen
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Temperature measurements
MOVING CAMERA
FIXED CAMERA
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
250
300
350
400
450
500
550
600
650
700
0 20 40 60 80 100 120 140 160 180 200T
em
pe
ratu
re (
C)
Time (sec)
L4BEAM
Tem
pera
ture
Time
Expected result
250
300
350
400
450
500
550
600
650
0 5 10 15 20 25 30 35 40 45 50
Te
mp
era
ture
(C
)
Time (sec)
I60x15/1
Tem
pera
ture
Time
Expected result
MOVING CAMERA FIXED CAMERA
Measurement results
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Residual stress measurements
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Flange (longitudinal)
-200
-150
-100
-50
0
50
100
150
-75 -55 -35 -15 5 25 45 65
Flange width [mm]
Mea
sure
d S
tres
s [M
Pa]
Middle, Single (I60x15S)
Middle, Double (I60x15D
End, M. Double (I60x15MV)
FILLET WELD
Measurement results
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Imperfection measurements
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Measurement resultsRaw data
Processed data
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Sections 1, 5
Sections2, 3, 4
Characterising imperfections
Sections2, 3, 4
OR
Section3
Using Fourier
Transformation
Defining wavelengths,
amplitudes of the waves
Sections 2, 3
Section 3
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Loading frame
Test specimen
Measurementdevices
Hydraulic jacks
Load-bearing measurements
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Measurement programme
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Measurement results
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Global phenomena
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Local phenomena
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
FE model
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Geometrical imperfections
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Results
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Results
LT buckling Web buckling
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Results
Web buckling
Web crippling
LT buckling
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Summary
• Test series with industrial background completedGeometrical and mechanical imperfections measured and characterizedNonlinear behaviour modes determinedNumerical simulations with different geometrical imperfections carried outPossibilities and limitations of the standardized methods investigated
DFE 2008 – Design, Fabrication, and Economy, 2008. 04. 23-25., Miskolc, Hungary
Thank You for your attention!