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Table 3 Internal tensile forces of NSM FRP strip.

From: Flexural Strength of RC Beam Strengthened by Partially De-bonded Near Surface-Mounted FRP Strip

Resisting force

single line

Total of triple lines

300

400

500

300

400

500

T f1 (kN)

161.28

161.28

161.28

161.28

161.28

161.28

T f2 (kN)

172.80

230.40

288.00

518.40

691.20

864.00

T f3 (kN)

122.05

134.01

144.09

157.60

160.69

164.05

T f (kN)

122.05

134.01

144.09

157.60

160.69

161.28

T f /T f1

0.76

0.83

0.89

0.98

1.00

1.00

  1. Bold one represents the minimum value governing the failure