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. 2020 Feb 12;13(4):830. doi: 10.3390/ma13040830
Ars cross-sectional loss of the pitting corrosion;
r0 radius of the origin steel reinforcement without corrosion;
p(t) maximum depth of the pitting corrosion;
DCL depth of corrosion layer;
DCF depth of concrete cover filled with the corrosion products;
DCFmax maximum value of DCF;
DCLcr threshold thickness of corrosion layer;
DCF equivalent depth of the concrete cover;
capillary porosity of cementitious matrix of the concrete cover;
rs internal radius of the cylinder;
θ1 central angle corresponding to the corrosion zone around the steel reinforcement;
w/c ratio of water to cement;
Acp area of corrosion products;
α1 volumetric expansion factor of the corrosion products;
εrs tension strain of the concrete induced by the corrosion products;
pcorr corrosion pressure induced by the corrosion products;
pcorr corrosion pressure in the concrete at the radius rs along the radius direction;
pt hoop stress at the radius rs;
c1 external radius of the cylinder;
Ec Young’s modulus of concrete;
pcorrcrk cracked section of the concrete cover;
pcorrnoncrk non-cracked section of the concrete cover;
pe elastic stress of the concrete cover with inner crack;
fct peak tensile stress of the concrete;
rcr critical radius corresponding to the internal radius of the non-cracked cylinder.
σtcrk(r) hoop stress at a generic radius r;
a, b coordinates of the intersection point of the two softening lines;
w width of the corrosion-induced crack;
w0 peak of the corrosion-induced crack corresponding to zero tensile strength;
Δc total elongation of the concrete cover;
n number of corrosion cracks;
w(r) width of the corrosion-induced crack;
wm average value of the corrosion-induced crack;
DCP deformation of the concrete induced by the corrosion products;
βcr ratio of the crack area filled with the corrosion products;
αp ratio of hook stress and the radial stress;