Variable	Description
BFRP	Basalt Fiber-Reinforced Polymer
kb	Bond Coefficient
FRP	Fiber-Reinforced Polymer
GWP	Global Warming Potential
MRI	Magnetic Resonance Imaging
GFRP	Glass Fiber-Reinforced Polymer
CFRP	Carbon Fiber-Reinforced Polymer
AFRP	Aramid Fiber-Reinforced Polymer
HCC	Hollow Concrete Column
fu	Ultimate Stress
fv	Allowable Stress
${\epsilon }_{cu}$	Ultimate Strain
rs	Rib Spacing
rh	Relative Rib Area
wc	Concrete Lug Width
wf	FRP Bar Lug Width
$\tau$	Average Bond Stress
$F$	Tensile Force
$C_b$	Effective Circumference of FRP Bar
$l$	Bonded Length
$S_{max}$	Maximum Spacing Between Tension Reinforcing FRP Bars.
$E_f$	Design or Guaranteed Modulus of Elasticity of FRP Defined as Mean Modulus of Sample of Test Specimen $(E_f=E_{average}$)
$f_{fs}$	Stress Level Induced in FRP at Service Load
$C_c$	Clear Cover
$w$	Maximum Crack Width on the Tension Side
$E_{f }$	Modulus of Elasticity of FRP
$F_{f }$	Flexural Stress in FRP Bars
$\beta$	Ratio of the Distance from the Neutral Axis to Extreme Tension Fiber to Distance from Neutral Axis to Center of Tensile Reinforcement
$d_c$	Thickness of Concrete Cover Measured from Extreme Tension Fiber to Center of Tension Bars
$s$	Spacing of Longudinal Bars
$M_n$	Nominal Flexural Capacity
$f_{r,ACI}$	Fracture Stress (American Concrete Institute)
$f_{r,CAN}$	Fracture Stress (Cadian Code)
$f_{r,RUS}$	Fracture Stress (Rsian Code)
$f_{r,EC2}$	Fracture Stress (Eopean code)
$M_{cr}$	Cracking Moment
$f_{fs,sus}$	Fatigue Stress due to Sustned and Fatigue Load
$n_f$	Ratio of Modulus of Elasticity of FRP Bars to the Modulus of Elasticity of Concre
$d$	Effective Depth
$k$	Ratio of Neutral Axis Deh to Effective Depth
$I_{cr}$	Cracked Moment of Inertia
$A_f$	Area of FRP Bars
${\rho }_f$	Fiber-Reinforced PolymeReinforcement Ratio
$b$	Width
$f_{fu}$	Design Tensi Strength
$f_{fu}^{*}$	Guaranteed Tenle Strength
$C_E$	Environmental Reduction Factor
Vn	Nominal Shear Strength at Section
Vc	Shear Resistance Provided by Concrete Mechanisms
Vf	Shear Resistance Provided by the Reinforcing FRP Stirrups
$V_s$	Shear Resistance Provid by Steel Stirrups
$V_{u }$	Factored Shear Foe at Section
$w$	Maximum Allowab Crack Width
$f_{fv}$	Tensile Strength of FRP for Shear Design
${\rho }_{fv}$	Ratio of FRP Shear Reinforcement
$f_{fb}$	Strength of the Bent Portion of FRP
$A_{fv}$	Area of FRP Stirrups
$s$	Spacing between Stirrups