Issue 57

K. Benyahi et alii, Frattura ed Integrità Strutturale, 57 (2021) 195-222; DOI: 10.3221/IGF-ESIS.57.16

with reliability methods for the assessment of the reliability index has been used (Robuschi et al. [39], Slobbe et al. [40], Grubiši ć et al. [41]). This paper aims to develop numerical models making it possible to represent as faithfully as possible the physical phenomena studied, and that by the use of an efficient theoretical model for the analysis of the sections behavior in the shear loading in the case of the reinforced and/or prestressed concrete beams. This calculation procedure should allow the analysis of different section shapes, and take into account the real materials behavior. In fact, given the complexity of the mechanical model studied, errors can occur because of a lack of information on the various design parameters. It is for this reason, that an evaluation of the reliability characteristics will be made by a procedure (FORM/SORM) in order to evaluate the probabilities of failure for the various transition zones of the limit state of the mechanical model solving the section’s behavior in the shear loading in the case of the reinforced and/or prestressed concrete structural elements.

(a). Compression in principal compressive direction with Sargin [42]

(b). Concrete in principal tensile direction with Grelat [15]

(b). Concrete in principal tensile direction with Grelat [15].

(d). Prestressing cable with BPEL99 [44]

Figure 1: Constitutive relations used in analysis procedure.

S TRESS - STRAIN RELATIONSHIPS USED IN ANALYSIS PROCEDURE

I

n nonlinear elasticity, the stresses are related to the strains by the following relation:      

(1)

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