Issue 59

N. Kouider et alii, Frattura ed Integrità Strutturale, 59 (2022) 153-171; DOI: 10.3221/IGF-ESIS.59.12

N OMENCLATURE

CFS: Cold-formed steel. h : Height of profile. f b : Width of flange. f t : Thickness of flange. w t : Thickness of web. w d : Height of web. C: Length of dropped edge.

t : Section thickness. h p : Height of web. 1 p b ,

2 p b : Initial effective widths.

1 / 2 p b ,

2 / 2 p b : Half initial effective widths.

1 p C ,

2 p C ,

3 p C ,

4 p C : Initial effective width of flanged edges.

1 e l , 2 e l : Effective sole widths. 1 eff C : Effective width of flanged edges. 1 h , 2 h : Effective initial height of the web. L: Length of beam. w C : Corrugation width t C : Corrugation depth Ɵ : Orientation angle.: The yield strength of steel. Zg : Position of the compressed neutral axis.  , com ED : The maximum compressive stress.  : Density. E: Young’s modulus. ya f : The increased average yield strength.  1,2 : The reduction factor. ψ : Ratio of moments in segment.  K : Plate buckling factor. λ : Reduced slenderness.

u f : Ultimate strength. E: Elasticity module. ϑ : Poisson coefficient  0 M : Partial factor for resistance of cross-sections.  1 M : Partial factor for resistance of members to instability assessed by member checksn.

1,2 eff b : Effective width of the upper and lower sole (compressed and stretched).  1,2 bp : Reduced stretching of the upper and lower sole (compressed and stretched). eff A : Effective area of a cross section. c Z : Position of the tensioned neutral axis. , eff y I : Effective moment of inertia with respect to the axis (yy). , eff y W : Modulus of resistance cross section. K : Numerical coefficient depending on the type of forming.  : Factor depending on fy.

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