BEHAVIOR AND STRENGTH WATANAPONG
OF COLD-FORMED STEEL HIRANMARN
PRAKIT PREMTHAMAKORN
LIPPED CHANNEL SECTION PRAKIT CHOMCHU...
OUTLINE
 INTRODUCTION
 Load-Bearing Wall System
 OBJECTIVE
 SCOPE
 EXPERIMENTAL INVESTIGATION
 FINITE ELEMENT ANALYS...
INTRODUCTION
 Load-Bearing Wall System

s

MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
OBJECTIVE
 The main objective is to present the compressive
behavior of stud-track from experimental investigation
and Fi...
SCOPE
 Compression tests were conducted on 19 specimens for
300mm and 800mm length cold-formed steel C-section
columns wi...
EXPERIMENTAL
INVESTIGATION
o Test Specimens

(a) Stud Specimens

(b) Stud-Track
Specimens
MAHANAKORN UNIVERSITY OF TECHNOL...
EXPERIMENTAL
INVESTIGATION
o Section Dimensions

B

H

H

D

B

t

t
r

•Stud:
100x50x20x1.6mm

•tact,aver = 1.43mm

r

•T...
EXPERIMENTAL
INVESTIGATION
o Material Properties (JIS Z 2241-1998)

Coupon

fy (MPa)

fu (MPa)

E (MPa)

Elogation (%)

St...
EXPERIMENTAL
INVESTIGATION
o Initial Geometric Imperfection

fr

A

w

fl

B

2

C

Imperfaction ( mm. )

1.5
1

A

0.5...
EXPERIMENTAL
INVESTIGATION
o Test Rig and Gauge Arrangement

Ten transducers were installed to record the displacements of...
EXPERIMENTAL
INVESTIGATION
o Stud Test Results ( L= 300mm)

70

Max.

65

Specimen

Pu
(kN)

Failure
modes

60
55

31.8% o...
Load ( Ton. )

EXPERIMENTAL
INVESTIGATION
o Stud Test Results ( Typical failure of C300-2)
7
6.5
6
5.5
5
4.5
4
3.5
3
2.5
2...
EXPERIMENTAL
INVESTIGATION
o Stud Test Results ( Typical failure of C300-2)

MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
Load ( Ton. )

EXPERIMENTAL
INVESTIGATION
o Stud Test Results ( C300-3 specimen)
7
6.5
6
5.5
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5...
EXPERIMENTAL
INVESTIGATION
o Stud Test Results ( C300-3 specimen)

MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
EXPERIMENTAL
INVESTIGATION
o Stud Test Results ( L= 800mm)

70
65

Specimen

Pu
(kN)

Failure
modes

60
55
50

C800-1
C800...
EXPERIMENTAL
INVESTIGATION all C800 specimens)
o Stud Test Results (Final failure shape of

MAHANAKORN UNIVERSITY OF TECHN...
EXPERIMENTAL
INVESTIGATION
o Stud-Track Test Results ( L=
300mm)
Specimen

Pu
(kN)

70

65

Failure
modes

60
55
50
45

66...
EXPERIMENTAL
INVESTIGATION

o Stud-Track Test Results (Typical final failure shape of CT300-6 and -7)

MAHANAKORN UNIVERSI...
EXPERIMENTAL
INVESTIGATION
o Stud-Track Test Results ( L=
800mm)

70

65
60

Specimen

Pu
(kN)

Failure
modes

55
50
45

C...
EXPERIMENTAL
INVESTIGATION

o Stud-Track Test Results (Final failure shape of all CT800)

MAHANAKORN UNIVERSITY OF TECHNOL...
FINITE ELEMENT ANALYSIS
o Finite Element Model of Stud 300mm

ABAQUS/CAE
•Stud :
v. 6.11Shell

450
400

Stress (N/sqr.mm)
...
FINITE ELEMENT ANALYSIS
o Finite Element Model of Stud C300-4

Section imperfection (Inclined section)

2-Planes

MAHANAKO...
FINITE ELEMENT ANALYSIS
o Finite Element Model of Stud C300-4

Section imperfection (Inclined section)

MAHANAKORN UNIVERS...
FINITE ELEMENT ANALYSIS
o Finite Element Model of Stud C300-4

Local imperfection

MAHANAKORN UNIVERSITY OF TECHNOLOGY, TH...
FINITE ELEMENT ANALYSIS
o Finite Element Model of Stud C300-4

About 76% of AISI

MAHANAKORN UNIVERSITY OF TECHNOLOGY, THA...
FINITE ELEMENT ANALYSIS
o Finite Element Model of Stud C300-4

P = 0 kN

P = 33.6 kN

P = 61.0 kN (peak load) P = 24.2 kN
...
w

CONCLUSION
o The results indicated that the ultimate compressive strength obtained from the
experiment results were on...
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Easec13 presentation

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Behavior and Strength of Cold-Formed Steel Lipped Channel Section with Track under Compression

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Easec13 presentation

  1. 1. BEHAVIOR AND STRENGTH WATANAPONG OF COLD-FORMED STEEL HIRANMARN PRAKIT PREMTHAMAKORN LIPPED CHANNEL SECTION PRAKIT CHOMCHUEN NUTHAPORN WITH TRACK UNDER NUTTAYASAKUL MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND COMPRESSION
  2. 2. OUTLINE  INTRODUCTION  Load-Bearing Wall System  OBJECTIVE  SCOPE  EXPERIMENTAL INVESTIGATION  FINITE ELEMENT ANALYSIS  CONCLUSION MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  3. 3. INTRODUCTION  Load-Bearing Wall System s MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  4. 4. OBJECTIVE  The main objective is to present the compressive behavior of stud-track from experimental investigation and Finite Element Analysis (FEA) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  5. 5. SCOPE  Compression tests were conducted on 19 specimens for 300mm and 800mm length cold-formed steel C-section columns with stud and stud-track  Finite Element Analysis (FEA) was conducted for 300mm length stud specimens  The Ultimate experimental compressive strengths of the studs are compared with the design strengths calculated (AISI 2007) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  6. 6. EXPERIMENTAL INVESTIGATION o Test Specimens (a) Stud Specimens (b) Stud-Track Specimens MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  7. 7. EXPERIMENTAL INVESTIGATION o Section Dimensions B H H D B t t r •Stud: 100x50x20x1.6mm •tact,aver = 1.43mm r •Track: 105x50x1.6mm •tact,aver = 1.53mm MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  8. 8. EXPERIMENTAL INVESTIGATION o Material Properties (JIS Z 2241-1998) Coupon fy (MPa) fu (MPa) E (MPa) Elogation (%) Stud 292.25 358.68 218,385 40.6 Track 280.64 345.82 190,426 39.4 MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  9. 9. EXPERIMENTAL INVESTIGATION o Initial Geometric Imperfection fr A w fl B 2 C Imperfaction ( mm. ) 1.5 1 A 0.5 B_Left 0 -0.5 0 50 100 150 200 250 -1 300 B_Mid B_Right C -1.5 -2 Length ( mm. )  w ,m ax  1 . 775 m m  f ,m ax  1 . 217 m m MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  10. 10. EXPERIMENTAL INVESTIGATION o Test Rig and Gauge Arrangement Ten transducers were installed to record the displacements of the specimen under the progressive increase in the axial compression, one for vertical and night for horizontal direction MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  11. 11. EXPERIMENTAL INVESTIGATION o Stud Test Results ( L= 300mm) 70 Max. 65 Specimen Pu (kN) Failure modes 60 55 31.8% of max. Min. 50 C300-1 C300-2 C300-3 C300-4 C300-5 C300-6 Average 62.98 61.70 44.46 62.05 49.93 42.96 54.01 L L L L L L Load ( kN. ) 45 40 35 30 25 20 15 10 5 0 0 1 2 3 4 5 6 7 8 9 10 11 12 Displacement ( mm. ) Local buckling C300-1 (Pu=62.98) C300-2 (Pu=61.70) C300-3 (Pu=44.46) C300-4 (Pu=62.05) C300-5 (Pu=49.93) C300-6 (Pu=42.96) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  12. 12. Load ( Ton. ) EXPERIMENTAL INVESTIGATION o Stud Test Results ( Typical failure of C300-2) 7 6.5 6 5.5 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0 1 2 3 4 5 6 7 8 Displacement ( mm. ) 9 10 11 12 MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  13. 13. EXPERIMENTAL INVESTIGATION o Stud Test Results ( Typical failure of C300-2) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  14. 14. Load ( Ton. ) EXPERIMENTAL INVESTIGATION o Stud Test Results ( C300-3 specimen) 7 6.5 6 5.5 5 4.5 4 3.5 3 2.5 2 1.5 1 0.5 0 0 1 2 3 Displacement ( mm. ) 4 5 6 7 8 9 10 11 12 MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  15. 15. EXPERIMENTAL INVESTIGATION o Stud Test Results ( C300-3 specimen) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  16. 16. EXPERIMENTAL INVESTIGATION o Stud Test Results ( L= 800mm) 70 65 Specimen Pu (kN) Failure modes 60 55 50 C800-1 C800-2 C800-3 Average 52.40 52.44 47.43 50.76 L L L Load ( kN ) 45 40 35 30 25 20 15 10 5 0 Local buckling Average C300 54.01 Less than C300 0 1 2 3 4 5 6 7 8 9 10 11 12 Displacement ( mm. ) C800-1 (Pu=52.40) C800-2 (Pu=52.44) C800-3 (Pu=47.43) about 6% MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  17. 17. EXPERIMENTAL INVESTIGATION all C800 specimens) o Stud Test Results (Final failure shape of MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  18. 18. EXPERIMENTAL INVESTIGATION o Stud-Track Test Results ( L= 300mm) Specimen Pu (kN) 70 65 Failure modes 60 55 50 45 66.68 65.46 60.36 58.70 69.19 66.68 66.86 64.85 L L L L+D L L L 40 Load ( kN. ) CT300-1 CT300-2 CT300-3 CT300-4 CT300-5 CT300-6 CT300-7 Average 35 30 25 20 15 10 5 0 0 1 2 3 4 5 6 7 8 9 10 11 Displacement ( mm. ) 54.01 CT300-1 (Pu=66.68) More than C300 about 20% CT300-2 (Pu=65.46) CT300-3 (Pu=60.36) CT300-4 (Pu=58.70) Average C300 12 CT300-5 (Pu=69.19) CT300-6 (Pu=66.68) CT300-7 (Pu=66.86) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  19. 19. EXPERIMENTAL INVESTIGATION o Stud-Track Test Results (Typical final failure shape of CT300-6 and -7) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  20. 20. EXPERIMENTAL INVESTIGATION o Stud-Track Test Results ( L= 800mm) 70 65 60 Specimen Pu (kN) Failure modes 55 50 45 CT800-1 CT800-2 CT800-3 Average 62.23 63.18 67.92 64.44 L L L Load ( kN. ) 40 35 30 25 20 15 10 5 0 0 Local buckling Average C800 50.76 More than C800 about 27% 1 2 3 4 5 6 7 8 9 10 11 12 Displacement ( mm. ) CT300-1 (Pu=66.68) CT300-2 (Pu=65.46) CT300-3 (Pu=60.36) CT300-4 (Pu=58.70) CT300-5 (Pu=69.19) CT300-6 (Pu=66.68) CT300-7 (Pu=66.86) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  21. 21. EXPERIMENTAL INVESTIGATION o Stud-Track Test Results (Final failure shape of all CT800) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  22. 22. FINITE ELEMENT ANALYSIS o Finite Element Model of Stud 300mm ABAQUS/CAE •Stud : v. 6.11Shell 450 400 Stress (N/sqr.mm) •Stud : Mesh size Element (S4R) •Plate : 5x5 mm Analytical rigid •Friction Coef. = 0.3Top Pl. move down •BC : only: Bottom Pl •BC is fixed. •Non-Linear Static Analysis, General •Inclined section imperfection •Local imperfection 350 300 250 200 150 100 50 0 0 0.02 0.04 0.06 Strain (mm/mm) 0.08 0.1 True_Plastic MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  23. 23. FINITE ELEMENT ANALYSIS o Finite Element Model of Stud C300-4 Section imperfection (Inclined section) 2-Planes MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  24. 24. FINITE ELEMENT ANALYSIS o Finite Element Model of Stud C300-4 Section imperfection (Inclined section) MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  25. 25. FINITE ELEMENT ANALYSIS o Finite Element Model of Stud C300-4 Local imperfection MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  26. 26. FINITE ELEMENT ANALYSIS o Finite Element Model of Stud C300-4 About 76% of AISI MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  27. 27. FINITE ELEMENT ANALYSIS o Finite Element Model of Stud C300-4 P = 0 kN P = 33.6 kN P = 61.0 kN (peak load) P = 24.2 kN Actual failure mode MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
  28. 28. w CONCLUSION o The results indicated that the ultimate compressive strength obtained from the experiment results were only 56-82% of the estimated strength based on the Direct strength method (AISI 2007) at 76.7 kN o The reduction of compressive strength indicates that just a little bit of inclined section imperfections may significantly reduce the ultimate strength of the short stud o The results of stud-track specimens indicate that the ultimate compressive strength of stud can be increased and more consistency by connecting the studs with tracks at both ends o The finite element model of 300mm length stud include inclined section imperfection indicate good agreement with the experiment results MAHANAKORN UNIVERSITY OF TECHNOLOGY, THAILAND
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