コンクリート橋診断エキスパートシステムの開発と実用化

Abstract

A major part of bridge rating which is the kernel of bridge maintenance system is usually performed based on the subjective judgment of experts in the related fields. By considering the shortage of experts in the expanding field of bridge maintenance and need for the exact diagnosis of bridge condition, the systematization of bridge rating to replace the subjective information of bridge engineers such as professional experience, knowledge on bridge rating, etc. has become an important problem. The present paper is to introduce a newly developed expert system capable not only of various inferences and judgments for maintenance but also of output of estimation results of remaining life for existing bridges. Moreover, its application to some reinforced concrete T-beam bridges in service is also considered. For the construction of the knowledge base including the subjective information related to bridge rating, a concept of fuzzy set theory is adopted to deal with it. The final results produced by this system are represented by five elements of linguistic expressions with the fuzziness value which is the degree of subjective uncertainty.