Baseline dynamic finite element model of prestressed concrete continuous box-girders

The paper describes thefield ambient vibration testing on a prestressed concrete continuous box-girders,named Yongyang canal super bridge.The operational modal analysis(OMA) based on the frequency and spatial domain decomposition(FSDD) were used in the output-only data model identification,and the dynamic characteristics(natural frequencies and mode shapes) of the bridge were got.The complete three-dimensionalfinite element model of the bridge was established and updated based on the above results using genetic algorithm.The baseline-nite element model of the bridge were provided,which reflects the dynamic behaviors of the bridge structure and can serve as a baseline in the long-term health monitoring,condition evaluation and damage identication of the bridge in service.