Issue 68

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

100 150 200 250 300 350 400

100 102 104 106 108 110 112 114

351,87

111,54

110,76

332,58

331,90

327,81

110,38

110,27

110,14

324,74

110,08

300,52

275,62

100,47

Load (kN)

Load (kN)

94 96 98

0 50

SP01 SP02 SP03 SP04 SP05 SP06 SP07

SP01 SP02 SP03 SP04 SP05 SP06 SP07

Specimen number b) Failure load.

Specimen number a) First crack load.

Figure 14: First crack and failure loads for all tested specimens.

3,0

2,42

2,32

2,5

2,23 2,29

2,20

0,5 Bottom steel strain  sf (10 -3 ) 1,0 1,5 2,0

2,08

1,93

0,0

SP01 SP02 SP03 SP04 SP05 SP06 SP07

Specimen number

Figure 15: Bottom steel reinforcement strain for all specimens at failure load.

3,0

2,49

2,42

2,5

2,29

2,28

2,25 2,32

2,04

0,5 Concrete strain  cf (10 -3 ) 1,0 1,5 2,0

0,0

SP01 SP02 SP03 SP04 SP05 SP06 SP07

Specimen number

Figure 16: Concrete strain for all specimens at failure load.

29