Abstract
This paper presents a supporting system for evaluation of the safety of bridges by maintenance engineers. The system consists of three subprocesses: On the first, the dominant factors for evaluating the safety of bridges are determined using the hierarchical diagraph developed by ISM. On the second, pair-wise comparisons of bridges characterized with the factores are done by maintenance experts, and a safety-order-diagram is drawn automatically by the supporting system. On the third, through the discriminant analysis of the diagram bridges are numerically classified into three categories; safety, a slightly danger and danger.
We do experiments on evaluation of 24 bridges by three experts of different professional background and also make camparison between the results gotten by this system and the ones by the phisycal evaluation of dynamic characteristics of bridges.
