Afib	Area of fibers
$a$	Experimental contribution of the FRCMs to the ultimate flexural capacity of the strengthened specimen
β	Coefficient to compensate the slipping effect of the fabric inside the matrix
$E_{ci}$	Secant modulus of deformation
${\epsilon }_{f,u}$	Fabric ultimate deformation
${\epsilon }_{c,u}$	Deformation of the concrete is taken
εs,u	Ultimate strain of the steel reinforcement
${\epsilon }_{s,y}$	Elastic limit
Fy,exp	Experimental yielding flexural force
fb0/fc0	Relationship between the maximum uniaxial and biaxial compression stress at the beginning of the loading process
$f_{ct,k}$	Characteristic tensile strength
$f_{ct,m}$	Medium tensile strength
fc	Concrete compression strength
fs,u	Tensile stress supported by tensile steel
fs,uk	Tensile stress supported by skin steel
ff,u	Tensile stress supported by fabric when the strengthened beam reaches the maximum experimental moment
Ky,exp	Experimental stiffness coefficient
K	Form parameter of the plasticizing surface
k	Theoretical contribution of fibers to the ultimate bending capacity of concrete beams
Mmax,exp	Experimental maximum flexural moment
My,exp	Experimental yielding flexural moment
Mmax,an	Analytical predictions of the maximum flexural moment
$M_{cmax,an}$	Analytical ultimate moment of control beams
$M_{c,c},M_{s,c}$	Flexural contributions of concrete (control and strengthened beams)
$M_{c,s},M_{s,s}$	Flexural contributions of tensile steel reinforcement (control and strengthened beams)
$M_{c,s,sk},M_{s,s,sk}$	Flexural contributions of skin steel reinforcement (control and strengthened beams)
$M_{c,s,2},M_{s,s,2}$	Flexural contributions of compressive steel reinforcement (control and strengthened beams)
$M_{sma,an}$	Analytical ultimate maximum strength of strengthened beams
δmax,exp	Experimental deflections recorded at the mid-span of specimens at the maximum flexural moment
δy,exp	Experimental deflections recorded at the mid-span of specimens when the yielding flexural moment is reached
x	Neutral axis depth