Parametric Updating of Steel Strand Stay Cable Force Calculation Model Based on Response Surface Method

Table 3

Parameters to be modified.

CCD test code (unit)	Parameter	Design value	Low level	High level	Coefficient of variation
X (kN · m^2)	Cable bending stiffness	0.4EImax	0.1 EImax	0.7 EImax	0.10
Y (m)	Calculated length of cable	L–L1	L–2L1	L	0.05
Z (kg)	Unit weight of stay cable	m + 0.5m1	m	m + m1	0.20

Note. EI_max is the maximum bending stiffness of the cable. L is the length between anchor positions at both ends of the stay cable, and L₁ is the length from the anchor end to the shock absorber. m is the sum of the unit weight of 43 parallel steel strands, and m₁ is the unit weight of the HDPE casing.