Improved Deflection Prediction Model for PSC Box Girder with Stay Cable System during Tensioning Phase

Table 2

Statistical properties of random variables.

Variable	Properties	Distribution	Mean	COV	Source
DLA	Dynamic load amplification/X1	Normal	1.0899	0.0279	GBT 50283-1999 [24]
KSQ	Ratio of maximum measured value to design value/X2	Extremum І type	0.7995	0.0862
α1	Creep uncertainty coefficient/X3	Normal	1.000	0.34	Pan et al. [25]
α2	Shrinkage uncertainty coefficient/X4	Normal	1.000	0.45
fcm28 (MPa)	Compressive strength (28 days)/X5	Normal	49.2	0.066	Yang [1]
Ec28 (MPa)	Elastic modulus of concrete (28 days)/X6	Normal	34,500	0.04	Guo et al. [26]
DW1 (kN/m^3)	Density of concrete/X7	Normal	26.5	0.215
T (°C)	Annual mean temperature/X8	Normal	23.9	0.341	CMDC [27]
RH (%)	Annual relative humidity/X9	Normal	70.9	0.175
fpy (MPa)	Yield strength/X10	Normal	1636.8	0.025	AL-Harthy et al. [28]
σcon (MPa)	Prestressed tension control stress/X11	Normal	1,395	0.040
σs2 (MPa)	Anchorage deflection, reinforcement retraction, and joint compression/X12	Normal	5.549	0.175	Fan et al. [29]
μ	Friction coefficient/X13	Normal	0.18	0.299	Pan [5]
k	Friction influence coefficient/X14	Normal	0.003	0.553
Cs (kg/m^3)	Surface chloride concentration/X15	Normal	15	0.2	Val et al. [30]
Ccr (kg/m^3)	Critical chloride concentration/X16	Normal	2.0	0.2
D (cm^2/year)	Diffusion coefficient/X17	Lognormal	0.631	0.2
icorr (μA/cm^2)	Corrosion current density/X18	Normal	1.0	0.2	González et al. [31]
R	Permeability ratio/X19	Normal	3.0	0.33	Stewart et al. [32]