Issue 61

P. Costa et alii, Frattura ed Integrità Strutturale, 61 (2022) 108-118; DOI: 10.3221/IGF-ESIS.61.07

Figure 7: Steel reinforcements embedded in concrete.

Figure 8: Displacements application point (meshed).

The properties of materials and parameters of the constitutive models in the elastic and plastic regime are observed in Tab. 2 and Tab. 3 respectively. The constitutive model of steel was considered perfectly plastic with yield stress equal 500 MPa. The average tensile strength of the concrete considered was 2.10 MPa.

Compressive Strength (MPa)

Tensile Strength (MPa)

0 E (GPa)

Material Concrete

21.5

30.0

0.20

Steel CA50

200.0

*

500.0

(*) the rupture of reinforcements was not considered in the model. Table 2: Elastic properties of materials.

b0 c0 f /f

Dilation angle (°)

Material

Eccentricity

K

Viscosity

C30

45

0.10

1.05

0.667

0.0001

Table 3: Plastic properties of concrete.

100

2,5

100

Constitutive law - C30 Damage evolution

Constitutive law - C30 Damage evolution

30

80

2,0

80

25

60

1,5

60

20

40

1,0

40

15

Damage index (%) 0,5 Strength (MPa)

Strength (MPa)

20

20

Damage index (%)

10

0

0,0

0

5

0,0000 0,0005 0,0010 0,0015 0,0020 0,0025 0,0030

0,000 0,001 0,002 0,003 0,004 0,005 0,006 0,007

Inelastic strain (mm/mm)

Inelástic strain (mm/mm)

Figure 9: Constitutive law and damage evolution of C30 (compression).

Figure 10: Constitutive law and damage evolution of C30 (traction).

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