Issue 68

H. Mostafa et alii, Frattura ed Integrità Strutturale, 68 (2024) 19-44; DOI: 10.3221/IGF-ESIS.68.02

Specimen Number

P cr /P cr SP01 (%)

P f /P f SP01 (%)

T/T SP01 (%) 100.00 112.73 114.72 118.13 109.94 121.12 137.44

 f /  f SP01 (%)

 cf /  cf SP01 (%)

 sf /  sf SP01 (%)

SP01 SP02 SP03 SP04 SP05 SP06 SP07

100.00 109.75 109.62 109.86 109.57 111.02 110.24

100.00 109.03 118.94 120.42 117.82 127.67 120.67

100.00 112.90 108.85 107.11 107.53 106.43 117.20

100.00

100.00 105.35

89.35

108.95

94.79 87.88

98.37

101.55 105.81 100.21

101.61 104.02 110.16

Table 3: Experimental test results compared to the control specimen SP01.

100 150 200 250 300 350 400

100 150 200 250 300 350 400

b) Effect of gratings position (Group 2)

a) Effect of using gratings (Group 1)

SP01 SP02 SP03 SP04

Load (kN)

Load (kN)

SP01 SP02

0 50

0 50

0 2,5 5 7,5 10 12,5 15 17,5 20 22,5 25

0 2,5 5 7,5 10 12,5 15 17,5 20 22,5 25

Deflection (mm)

Deflection (mm)

100 150 200 250 300 350 400

100 150 200 250 300 350 400

SP01 SP02 SP06

SP01 SP02 SP05

Load (kN)

Load (kN)

c ) Effect of gratings numbers (Group 3)

d) Effect of gratings thickness (Group 4)

0 50

0 50

0 2,5 5 7,5 10 12,5 15 17,5 20 22,5 25

0 2,5 5 7,5 10 12,5 15 17,5 20 22,5 25

Deflection (mm)

Deflection (mm)

100 150 200 250 300 350 400

SP01 SP02 SP07

Load (kN)

e) Effect of gratings dimensions (Group 5)

0 50

0 2,5 5 7,5 10 12,5 15 17,5 20 22,5 25

Deflection (mm)

Figure 13: The effects of the studied variables on the load-deflection curves.

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