Issue 54

T. I. J. Brito et alii, Frattura ed Integrità Strutturale, 54 (2020) 1-20; DOI: 10.3221/IGF-ESIS.54.01

120

60

120

B

A

B

A

15

270

15

CROSS SECTION B-B

CROSS SECTION A-A

30

30

20

20

DIMENSIONS IN CENTIMETERS

Figure 9: Geometry and typical reinforcement arrangement of the beams [4].

Beam

f c ' (MPa)

A s

A' s

d (mm)

d' (mm)

B1

31.6

2 Ø 14

2 Ø 14

258

42

B2

28.84

2 Ø 18 + 2 Ø 16 + 2 Ø 14

2 Ø 14 + 2 Ø 18

256

43

B3

29.53

2 Ø 22

2 Ø 14 + 2 Ø 25

254

45

Table 2: Geometric and material proprieties of the Sharifi’s beams [4].

For the specimen B1 it was observed that all analyses had good approximation with the experimental results for the three stages and reached the collapse load. The obtained results are shown in Fig. 10.

Figure 10: Convergence of results to the experimental beam B1 [4]

Furthermore, all curves present closer results to the experimental curve at primary stage, but for higher values of γ , the stiffness is closest than the others. For B2, the results of load-displacement are shown in Fig. 11.

14