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Table 2 Measured and predicted results for the uniaxial tensile tests of hybrid FRP sheets with (GF/CF = 8.8/1) (first test program).

From: Hybrid Effects of Carbon-Glass FRP Sheets in Combination with or without Concrete Beams

Specimen

Meas.

E HF [GPa]

Meas.

ε u_C_HF

Meas.

σ u_C_HF (MPa)

E a HF (GPa)

ε a u_C_HF

σ a u_C_HF (MPa)

σ b u_C_HF (MPa)

Meas. E * GF (GPa)

Meas. ε u_G_HF

Meas. σ u_G_HF (MPa)

σ a u_G_HF (MPa)

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

(11)

(12)

Hybrid-1

59.2

0.0153

864.5

52

0.011

583.9

841.8

59

0.0218

1,040

711

Hybrid-2

67.1

0.0144

864.5

52

0.011

583.9

841.8

51.2

0.0181

928

711

Hybrid-3

68.5

0.0152

876.3

52

0.011

583.9

841.8

54

0.0228

1,277

711

Average

64.9

0.0150

868.4

52

0.011

583.9

841.8

54.7

0.0209

1,082

711

  1. Meas. measured.
  2. aBased on the rule of mixtures.
  3. bBased on the rule of hybrid mixtures (Miwa and Horiba 1994).
  4. E HF elastic modulus of hybrid FRP sheet; σ u_C_HF stress at CF rupture of hybrid FRP sheet; ε u_C_HF strain at CF rupture of hybrid FRP sheet; E * GF average stress increase of hybrid FRP sheet divided by strain increase after CF rupture; σ u_G_HF stress at GF rupture of hybrid FRP sheet; ε u_G_HF strain at GF rupture of hybrid FRP sheet.