Baseline Dynamic Finite Element Model of Prestressed ConcreteContinuous Box-Girders
Lin Xiankun1 Zhang Lingmi1 Guo Qintao2 Zhang Yufeng3
1.Institute of Vibration Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing210016 ; 2.College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016 3.Jiangsu Transportation Research Institute, Nanjing 210017
Abstract：Abstract :The paper describes the ¯eld 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) are used for the output-only data model identi¯cation, and the dynamic characteristics (natural frequencies and mode shapes) of above bridge are got. The full three-dimensional ¯nite element model of the above bridge is established and updated based on the above results using genetic algorithm. The baseline ¯nite element model of the above bridge is got, which re°ects the bridge structural dynamicconditions and can serve as a baseline in the long-term health monitoring, condition evaluation and damage identi¯cation of the bridge in service.
2009, Vol. 28 
