Issue 58

M. Emara et alii, Frattura ed Integrità Strutturale, 58 (2021) 48-64; DOI: 10.3221/IGF-ESIS.58.04

(a) (b) Figure 2: Concrete damage plasticity model: (a) Compression, and (b) Tension

- σ

- f y

Compression

E s

ε y

- ε y

Tension

f y

+ σ

Figure 3: Stress-strain relationship for steel reinforcement

Parameter

Value

Description Dilation angle Eccentricity

30

Ψ

0.1



The ratio of initial equibiaxial compressive yield stress to initial uniaxial compressive yield stress.

fb fc 0 0 /

1.16

μ

0.0001

Viscosity Parameter

k

0.667 Kc, the ratio of the second stress invariant on the tensile meridian Table 1: Material parameters of concrete, based on ABAQUS recommendations.

Property

Description

Unit

Value

ρ

Density

1600

kg/ 3 m

Elastic modulus in longitudinal (fiber) direction Elastic modulus in transverse (matrix) direction

GPa GPa GPa MPa MPa MPa MPa MPa

89 17

1 E 2 E

In-plane shear modulus

6

12 G 1 t σ 1 c σ 2 t σ 2 c σ

Longitudinal tensile strength

1548 1200

Longitudinal compressive strength

Transverse tensile strength

50

Transverse compressive strength

250

In-plane shear strength

70

12 τ

Table 2: CFRP material properties.

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