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Table 8 Strain by specimens according to the maximum load.

From: Experimental Seismic Structural Performance Evaluations of RC Columns Strengthened by Stiff-Type Polyurea

Specimen

PMax (kN)

Reinforcement strain (× 10–6)

Ratio

C-RC

− 208.63

15,813.94

1.00

174.51

2266.68

1.00

C-PU

− 173.59

8986.20

0.57

188.79

1912.69

0.84

C-GFPU

− 188.37

15,933.99

1.00

180.49

1643.11

0.72

R-RC

− 224.62

3503.03

1.00

224.07

1079.27

1.00

R-PU

− 218.09

2998.34

0.85

210.10

800.11

0.74

R-GFPU

− 253.13

3344.37

0.95

207.29

841.81

0.77

  1. RC: non-strengthened, C-: circular column, R-: rectangular column.