PSI - Issue 31

F. Kheloui et al. / Procedia Structural Integrity 31 (2021) 140–146 F. Kheloui et al. / Structural Integrity Procedia 00 (2019) 000–000

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2.3. Loading and boundary conditions In the model studied one end of the concrete cylinder which corresponds to a position 0, was embedded. All the degrees of freedom on this surface were blocked. A monotonic compressive axial load to failure was applied to the other surface which corresponds to a position 32 cm, see Fig. 2.

Fig.2. Modeling procedure: a) Boundary Conditions, b)Load Mode.

2.4. Variation of hoops width In order to optimize the use of the composite fabric, in the case of circular partial confinement, we analyzed the various results predicted by the numerical simulation of the specimens taking into account the variation in the width of the bands of the proposed composite.

Table 3. Variation of hoops width

spacing = 10mm, thickness = 1mm

L=50mm

L=40mm

L=30mm

L=25mm

3. Results and interpretations The Fig.3 and Fig.4 illustrated the evolution of the stresses in the different partially, totally confined and unconfined specimens.