Abstract
The necessity of developing a computer-aided bridge rating system has been pointed out for maintenance, diagnosis, repair and rehabilitation of existing bridges. There are multiple processes of damage with a lot of damage factors in existing bridges in service. In this paper, an engineering prediction model for a bridge rating system is proposed based on the fuzzy hierarchy structural modeling. The fuzzy set theory which introduced the idea of a vagueness function and Dempster and Shafer's theory is applied to final stage of rating. A few concrete bridges on which field data have been collected are analyzed to demonstrate the applicability of this rating system.
The results obtained are sufficient to apply the rating to cracked reinforced concrete bridge girders and slabs.
