Benefit Evaluation of Preventive Maintenance of Highway Bridges Based on Fuzzy Neural Network

Table 4

Benefit grades of preventive maintenance of highway bridges.

Benefit class	Level 1	Level 2	Level 3	Level 4	Level 5
Benefit evaluation value	>0.85	0.63∼0.85	0.45∼0.63	0.21∼0.45	<0.21