Baseline Dynamic Finite Element Model of Prestressed ConcreteContinuous Box-Girders

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Journal of Vibration and Shock ›› 2009, Vol. 28 ›› Issue (11) : 38-42.

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Baseline Dynamic Finite Element Model of Prestressed ConcreteContinuous Box-Girders

Lin Xiankun1 Zhang Lingmi1 Guo Qintao2 Zhang Yufeng3

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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.

Key words

Prestressed Concrete Continuous Box-Girders / Field Ambient Vibration Testing / Dynamic Characteristics / Model Updating / Baseline Finite Element Model

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Lin Xiankun Zhang Lingmi Guo Qintao Zhang Yufeng. Baseline Dynamic Finite Element Model of Prestressed ConcreteContinuous Box-Girders[J]. Journal of Vibration and Shock, 2009, 28(11): 38-42