Issue 63

A. Kh. Elbaz et alii, Frattura ed Integrità Strutturale, 63 (2023) 257-270; DOI: 10.3221/IGF-ESIS.63.20

100 110

0 10 20 30 40 50 60 70 80 90

B01 B03 B04 B05

Load (KN)

0

5

10

15

20

25

30

35

40

45

Deflection (mm)

Figure 12: Load deflection curves for beams (B1, B3, B4 and B5)

Cracking Stage

Failure Stage

Maximum strain at

Maximum strain at Concrete ( ɛ )(mm/mm)

Maximum Crack Width (mm)

Mode of Failure

Beam

Pcr

∆ cr

Pmax

∆ max

tension RFT ( ɛ )(mm/mm)

(kN)

(mm)

(kN)

(mm)

B1

20

0.617

96.434

36.911

0.040527

0.001276

10.552

Ductile Flexural Failure

B 2

30

1.201

89.1

42.574

0.031313

0.001854

12.262

10

0.124

87.85

41.256

0.03321

0.001054

19.637

B 3

Pure Flexural Failure

10

0.607

83.1

39.397

0.01932

0.001306

26.405

B 4

B 5

10

0.259

77.81

34.512

0.010005

0.002098

28.343

Table 5: Experimental results and modes of failure

Figure 13: Definition of ductility index.

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