Durability Evaluation of Concrete Bridges Based on the Theory of Matter Element Extension—Entropy Weight Method—Unascertained Measure

Table 6

Standard data of the durability index.

Evaluation indicators	I	II	III	IV	V
Concrete presumed strength uniformity coefficient,	(0, 0.125]	(0.125, 0.25)	(0.25, 0.5)	(0.5, 0.75)	[0.75, 1)
Reinforcement corrosion potential level,	(0, 0.33]	(0.33, 0.5)	(0.5, 0.67)	(0.67, 0.83)	[0.83, 1)
Chloride ion content,	(0, 0.125)	(0.125, 0.33)	(0.33, 0.58)	(0.58, 0.83)	(0.83, 1)
Average value of concrete relative carbonation depth,	(0, 0.17)	(0.17, 0.33)	(0.33, 0.5)	(0.5, 0.67)	(0.67, 1)
Crack width,	(0, 0.17)	(0.17, 0.33)	(0.33, 0.5)	(0.5, 0.67)	(0.67, 1)
Resistivity,	(0, 0.38)	(0.38, 0.58)	(0.58, 0.77)	(0.77, 0.96)	(0.96, 1)
Characteristic value of reinforcement protective layer thickness,	(0, 0.1)	(0.1, 0.3)	(0.3, 0.6)	(0.6, 0.9)	(0.9, 1)