A FE model for studying high frequency vibration characteristics of simply-supported box-girder

SONG Lizhong; LI Xiaozhen; ZHANG Xun; LI Yadong

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A FE model for studying high frequency vibration characteristics of simply-supported box-girder

SONG Lizhong,LI Xiaozhen,ZHANG Xun *,LI Yadong

School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China

*Correspondence author

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Funding: National Natural Science Foundation of China （No.Grant no. 51308469, 51378429)）, Specialized Research Fund for the Doctoral Program of Higher Education of China （No.No. 20110184110020）

Opened online: 9 December 2015

Accepted by: none

Citation: SONG Lizhong,LI Xiaozhen,ZHANG Xun.A FE model for studying high frequency vibration characteristics of simply-supported box-girder[OL]. [ 9 December 2015] http://en.paper.edu.cn/en_releasepaper/content/4668294

A track-bridge coupled vibration model was established based on finite element method to simulate a 32 m high-speed railway simply-supported prestressed concrete box-girder with a CRTS type II slab ballastless track system. Acceleration mobilities of track slab and box-girder's top slab in frequency band from 10 Hz to 1000 Hz was calculated using the finite element model. To validate the reliability of the model, an in-situ hammer excitation test was conducted. The test and calculated results were compared and agreed well, which indicate that the high frequency vibration characteristics of box-girder can be accurately simulated by the model.

Keywords:box-girder; acceleration mobility; hammer excitation test; vibration characteristics

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