Knowledge-Based Fuzzy Expert System to the Condition Assessment of Historic Road Bridges

A systematic methodology for condition assessment of the historic road bridges was needed because poor and inadequate which cannot satisfy everyday-day dynamic loads deteriorations due to aging process. Thus in this study, a new expert system based on knowledge approach has been proposed develop procedure these using fuzzy logic sets ?-cuts. Each bridge is divided into three components: superstructure, substructure, equipment, each component relevant elements. These elements are evaluated by an their ratings fuzzified according defined sets, membership functions, linguistic values. Furthermore, structural importance given element. Combinations two values calculated obtain rating Fuzzy Weighted Geometric Mean (FWGM). Finally, defuzzification rating, centroid method proposed. The Analytic Hierarchy Process (AHP) used comparison components. achieved summering all components multiplied relative importance, it presented as value Historic Road Bridge Condition Assessment Index (HRBCAI). validation conducted built until end Austro-Hungarian Monarchy Split-Dalmatia County, Croatia.