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2008年 第2卷 第2期

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《结构与土木工程前沿（英文）》 >> 2008年 第2卷 第2期 doi: 10.1007/s11709-008-0028-4

Dynamic test and finite element model updating of bridge structures based on ambient vibration

1.School of Civil Engineering and Mechanics, Huazhong University of Science & Technology; 2.Wuhan Tianxinzhou Road & Bridge Investment Co Ltd

发布日期： 2008-06-05
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The dynamic characteristics of bridge structures are the basis of structural dynamic response and seismic analysis, and are also an important target of health condition monitoring. In this paper, a three-dimensional finite-element model is first established for a highway bridge over a railroad on No.312 National Highway. Based on design drawings, the dynamic characteristics of the bridge are studied using finite element analysis and ambient vibration measurements. Thus, a set of data is selected based on sensitivity analysis and optimization theory; the finite element model of the bridge is updated. The numerical and experimental results show that the updated method is more simple and effective, the updated finite element model can reflect the dynamic characteristics of the bridge better, and it can be used to predict the dynamic response under complex external forces. It is also helpful for further damage identification and health condition monitoring.

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