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Table 4 Summary of column test results

From: Seismic Retrofitting of RC Circular Columns Using Carbon Fiber, Glass Fiber, or Ductile PET Fiber

Column index

Load

Displacement

Displacement ductility (mm)

Drift ratio (%)

Failure mode

Py (kNm)

Pmax (kNm)

Δy (mm)

Δmax (mm)

C-1-Control

116

147

11.5

50.4

4.4

4.2

Main bar buckling

C-1-CF

126

178

7.9

78.4

9.9

6.5

CF rupture

C-1-PET

130

188

7.2

96.1

13.3

8.0

Main bar rupture

C-2-Control

134

157

11.3

58.5

5.2

4.9

Main bar buckling

C-2-GF

122

174 (222)1

13.7

98.0 (148)1

7.2 (10.8)1

8.2 (12.3)1

GF rupture

C-2-PET

134

180

10.6

96.0

9.1

8.0

Main bar rupture

C-3-Control

146

172

15.1

44.6

3.0

3.6

Shear failure

C-3-PET

133

214

9.6

83.3

8.7

6.7

Main bar rupture

C-3-HF-hoop

138

195

11.5

96.7

8.4

7.8

Main bar rupture

C-3-HF-spiral

133

211

10.9

88.4

8.1

7.1

Shear failure (upper part of column)

C-3-HF-spiral-LS

148

217

10.0

82.0

8.2

6.6

Shear failure (upper part of column)

  1. Py is yield load; Pmax is the maximum load; Δy is yield displacement; Δmax is displacement at the maximum load; 1Monotonic loading