Analysis of Bridge Health Detection Based on Data Fusion

Table 5

Durability index system of stay cables.

Index	Upper limit	Lower limit	Weights
Stress amplitude	250 MPa	110 MPa	0.3
Corrosion degree	Quantitative	Quantitative	0.3
Sheath damage	Qualitative	Qualitative	0.2
Damping system	Quantitative	Quantitative	0.2

Note. Weights are not the focus of this study. Stress amplitude is the difference between maximum tensile stress and minimum tensile stress in each stress cycle. Corrosion degree is divided into four grades: serious corrosion, medium corrosion, weak corrosion, and no corrosion. Sheath damage is mainly affected by aging and fatigue.