Extension Model for Safety Appraisal of Existing Concrete Members Based on an Improved Comprehensive Weighting Method

Table 7

Index weights calculated by the three methods.

Weight	Index					β1, β2
	Bearing capacity	Deflection/span	Cracks	Reinforcement corrosion	Concrete carbonation depth
Subjective weight (beam 2)	(0.583, 0.590)	(0.056, 0.065)	(0.063, 0.076)	(0.134,0.164)	(0.119, 0.141)	0.656
Objective weight (beam 2)	0.356	0.185	0.117	0.132	0.211	0.344
Comprehensive weight (beam 2)	(0.505, 0.510)	(0.100, 0.106)	(0.082, 0.090)	(0.133,0.153)	(0.150, 0.165)	—
Subjective weight (beam 12)	(0.381, 0.425)	(0.034, 0.035)	(0.106, 0.114)	(0.220,0.282)	(0.179, 0.213)	0.718
Objective weight (beam 12)	0.356	0.185	0.117	0.132	0.211	0.282
Comprehensive weight (beam 12)	(0.374, 0.405)	(0.076, 0.077)	(0.109, 0.115)	(0.195,0.240)	(0.188, 0.213)	—