Deformation Forecast of Main Girder Enhanced by Stay Cable System with Unequal Interval Grey Model and Residual Composite Correction

Table 5

Comparison of the fitting values by the different prediction models.

Tensioning phase	Tensioning force/kN	Measured values/mm	UIGM		UIGM-RCC
			Fitting values/mm	Relative error/%	Fitting values/mm	Relative errors/%
1	630	25.30	25.3000	0.0000	25.3000	0.0000
2	1,050	31.33	32.4076	-3.4394	30.0380	4.1238
3	1,155	33.27	34.4138	-3.4380	32.1588	3.3400
4	1,365	37.15	35.6871	3.9377	37.2764	-0.3404
5	1,575	42.78	37.4548	12.4478	43.0448	-0.6189
6	1,785	45.18	39.3101	12.9923	44.9645	0.4769