Assessment of Resistance Factors for LRFD of Steel Bolted Connections in Pultruded FRP Frames

Data Availability Statement

Notation

A_ns

net area subjected to shear;

A_nt

net area subjected to tension;

C_C

correlation coefficient;

C_CH

chemical environment factor;

C_i

correlation coefficient for net tension strength of bolted connection;

C_M

moisture adjustment factor for sustained in-service exposure condition;

C_P

correction factor;

C_T

temperature factor for sustained in-service temperatures;

C_Δ

geometry factor for pitch spacing;

C_ϕ

calibration coefficient;

d

nominal bolt diameter;

d_n

nominal hole diameter;

e₁

end distance;

e_1,min

minimum end distance;

e₂

edge distance;

e_2,min

minimum edge distance;

$F_{\theta }^{\mathrm{br}}$

characteristic pin-bearing strength at the angle θ;

$F_{L,m}^{\mathrm{br}}$

average longitudinal pin-bearing strength;

$F_{T,m}^{\mathrm{br}}$

average transverse pin-bearing strength;

F_m

mean fabrication factor;

$F_i^t$

characteristic tensile strength at the angle θ;

$F_{L,m}^t$

average longitudinal tensile strength;

$F_{T,m}^t$

average transverse tensile strength;

F_sh

characteristic in-plane shear strength;

F_sh,m

average in-plane shear strength;

g

Gage (i.e., the bolt spacing across a row);

K_nt,i

stress concentration factor at the angle θ;

M_m

mean material factor;

m

number of rows;

m_s

degree of freedom;

N

sample size;

n

number of bolts across the effective width;

P_m

mean professional factor;

P_m,i

professional factor of the sample i;

R_br

pin-bearing strength;

R_bs

block shear strength;

R_cl

cleavage strength;

R_n

nominal strength per the predictive analysis model;

R_nt

net tension splitting strength for one row of bolts;

R_nt,f

net tension splitting strength of the first row of bolts for multiple rows of bolts;

R_n,i

calculated nominal strength of the sample i per the predictive analysis model;

R_sh

shear out strength;

R_t

tested strength;

R_t,i

tested strength of the sample i;

s

pitch spacing (i.e., the bolt spacing between rows);

s_c

standard deviation of the mean professional factor;

t

thickness of the specimen;

V_F

coefficient of variation of the fabrication factor;

V_M

coefficient of variation of the material factor;

V_P

coefficient of variation of the professional factor;

V_Q

coefficient of variation of load effect;

w

effective width;

Z

safety margin

β

reliability index;

ζ

factor in pin-bearing strength that is equal to 1.0 if thread is excluded, otherwise equal to 0.6;

θ

angle between the direction of the connection force and the direction of pultrusion;

λ

time effect factor; and

ϕ-factor

resistance factor.

References