Performance Enhancement of System Identification Model for Vibration-Based Damage Detection in Flawed Plate-Girder Bridges

결함이 있는 판형교의 진동기초 손상검색을 위한 구조식별모델의 성능향상

System identification techniques can be used to build a baseline modal model for a flawed structure that has no modal information on its as-built state. The accuracy of a system identification proposed by Stubbs and Kim is analyzed for plate-girder bridges and its impact on the accuracy of damage detection in those structures is also analyzed. A laboratory-scale model plate-girder is experimentally tested and the initial four bending modes are examined for certain damage scenarios. The performance of individual baseline modal models is assessed by detecting damage in the model structure.