Performance of Compression Yielded FRP-Reinforced Concrete Beams with T Sections

Data Availability Statement

Acknowledgments

Notation

A

area enclosed by M–κcurve;

A_e

area equivalent to A;

A_f

area of FRP reinforcement;

A_s

area of steel bars;

b_f

flange width;

b_w

web width;

d

effective depth of beam;

E_b

elastic modulus of CY block;

E_c

elastic modulus of concrete;

$E{E}_{(X_j)}^{(k)}$

elementary effect of variable X_j;

E_f

elastic modulus of FRP;

F_b

force on CY block;

F_bi

force in the ith layer of the CY block;

F_c

force on concrete;

F_ci

force in the ith layer of concrete;

F_f

force on FRP bars;

F_s

force on steel;

f

stress of concrete corresponding to ɛ_c;

f_b

stress of CY block corresponding to ɛ_b;

f_bu

ultimate stress of CY block;

f_bx

stress at interface between CY block and concrete;

f_by

yield stress of CY block;

f_c

compressive strength of concrete;

f_f

stress of FRP;

f_fm

maximum allowable stress of FRP;

f_fu

ultimate stress of FRP;

f_s

stress on steel bars;

M_bi

moment in the ith layer of the CY block;

M_ci

moment in the ith layer of concrete;

M_max

maximum moment of CY beam with T section;

M_s

moment on steel bars;

M_t

moment of balanced beam section;

M_u

ultimate moment of CY beam with T section;

M₀

moment capacity of normal FRP-reinforced concrete beam with T section;

p

number of possible values of variable;

r

number of ductility or moment capacity calculated from section analysis;

t

layer thickness;

t_f

flange thickness;

X_j

jth input variable;

Y_i

location of ith layer;

Y_NA

location of neutral axis;

Δ

variable increment;

ɛ_b

strain at random point in CY block;

ɛ_bu

ultimate strain of CY block;

ɛ_by

yield strain of CY block;

ɛ_c

strain at random point in concrete;

ɛ_cu

crush strain of concrete;

ɛ_cx

strain at interface between CY block and concrete;

ɛ_f

strain of FRP;

ɛ_fm

maximum allowable strain of FRP;

ɛ_fu

rupture strain of FRP;

ɛ_ref

reference strain;

ɛ_s

strain on steel bars;

ɛ₀

yield strain of concrete;

ζ

concrete cover ratio;

η

height ratio of CY block;

κ

curvature of section corresponding to ɛ_ref;

κ_max

curvature corresponding to M_max;

κ_u

ultimate curvature;

κ_y

yield curvature of CY beam with T section;

${\mu }_j^{\ast }$

importance score of jth variable;

ξ

postmodulus ratio of CY material;

ρ_frp

reinforcement ratio of FRP;

ρ_s

reinforcement ratio of steel; and

ϕ_y

curvature ductility.

References