UPDATING AND VALIDATION OF THE DYNAMIC MODEL OF A RAILWAY VIADUCT WITH PRECAST DECK

被引：0
|
作者：
Malveiro, Joel [1 ]
Ribeiro, Diogo [2 ]
Calcada, Rui [1 ]
机构：
[1] Univ Porto, Fac Engn, Dept Civil Engn, Rua Campo Alegre 823, P-4100 Oporto, Portugal
[2] Polytech Inst Porto, Dept Civil Engn, Porto, Portugal
来源：
ICEM15: 15TH INTERNATIONAL CONFERENCE ON EXPERIMENTAL MECHANICS | 2012年
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D O I：
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中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper describes the calibration of the dynamic model of a railway viaduct with precast deck based on modal parameters. An ambient vibration test allowed the identification of the natural frequencies, mode shapes and damping coefficients of several global and local modes of vibration of the structure. The calibration was performed using a genetic algorithm. For the mode pairing, a new technique based on the calculation of the modal strain energy was used. The updated numerical model was validated based on a dynamic test under railway traffic. The results showed a very good agreement between numerical and experimental results.
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