Fuzzy comprehensive evaluation of durability based on the analytical hierarchy process

For the sake of accurately evaluating durability for double arch bridge, the evaluation model for the durability of existing double arch bridges was established by analytical hierarchy process (AHP). Using the membership functions theory in fuzzy mathematic, membership functions was established for evaluating indicators in two levels of the evaluation model and durability was evaluated by two level fuzzy overall evaluation models. Project example indicates that assessment result coincides with the actual situation and the method is feasible and acceptable.