Evaluation of the Durability of Bridge Tension Cables Based on Combination Weighting Method-Unascertained Measure Theory

Constant use over a period damages the bridge pulling cable structure of sling bridges and reduces their durability. Therefore, comprehensive accurate durability evaluation in-service cable-stayed structures is critical to safe operation routine maintenance repair bridges. In this paper, we first establish three-layered index system then combined IAHP CRITIC methods assign weights these indexes. The UM theory applied calculate multi-index vector for sling, which evaluated according confidence criterion. Taking Jiahui Bridge tension as an example, was carried out, final result showed be at level III, in line with actual situation project. Finally, by comparing analyzing using SPA MEE methods, prove that results cables method are more accurate.