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Table 3 Response parameters for test specimens.

From: FRP Confinement of Heat-Damaged Circular RC Columns

Specimen

F u

(kN)

Secant stiffness (kN·mm)

∆ max (mm)

Toughness (kN·mm)

Ductility

Control CH0-A

Control CH0-B

989.1

2764.9

0.41

227

1.19

Control CH2-A

Control CH2-B

535.7

(54.2)a

870.0

(31.5)

0.87

(212.2)

293

(129.1)

1.46

(122.7)

Control CH3-A

Control CH3-B

458.5

(46.4)a

719.0

(26)

1.06

(258.5)

321.9

(142.1)

1.62

(136.1)

CH0-C1L

1384.5

(140)a

1548.5

(56)

2.02

(492.7)

2097.2

(923.9)

2.37

(199.2)

CH2-C1L

1096.1

(204.6)b

587.6

(67.5)

3.49

(401.2)

2550

(870.3)

2.94

(201.4)

CH2-C2L

1364.5

(254.7)b

638.3

(73.4)

4.10

(471.3)

3822

(1304.4)

2.58

(176.7)

CH3-C1L

975.1

(212.7)c

548.7

(76.3)

2.79

(263.2)

1701

(528.4)

3.00

(185.2)

CH3-C2L

1332.5

(290.6)c

570.1

(79.3)

3.74

(352.8)

3100

(963.0)

2.61

(161.1)

CH2-G1L

790.5

(147.6)b

539.6

(62)

2.46

(282.8)

1286

(438.9)

2.07

(141.8)

CH2-G2L

1045.3

(195.1)b

603.4

(69.4)

2.53

(290.8)

1670

(570.0)

1.72

(117.8)

CH3-G1L

783.6

(170.9)c

472.0

(65.6)

2.43

(229.3)

1179

(366.3)

2.00

(123.5)

CH3-G2L

876.4

(191.1)c

539.9

(75.1)

2.61

(246.2)

1488

(462.2)

1.95

(120.4)

  1. a Numbers between brackets in this row represent a percentage of control unheated CH0 specimens.
  2. b Numbers between brackets in this row represent a percentage of control heat-damaged CH2 specimens.
  3. c Numbers between brackets in this row represent a percentage of control heat-damaged CH3 specimens.