Control mode selection for modal control of long-span
arch bridge
Zhengying LI,Zhengliang LI,
Author information+
Faculty of Civil Engineering,
Chongqing University, Chongqing 400030, China;
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History+
Published
05 Dec 2009
Issue Date
05 Dec 2009
Abstract
For seismic control of arch bridge, a model reduction of long-span arch bridge was implemented based on modal analysis. As for the critical mode selection, an approach based on the maximum modal displacement was presented. This approach takes into consideration the effect of external seismic excitation and is more reasonable than only considering dynamic bridge characteristics based on a modal contribution ratio. The time domain and frequency domain analysis method were used to verify the simplified model of the Nimu arch bridge in Tibet as an example. The numerical results show that the method of maximal modal displacement better analyze long-span arch bridge when multisupport seismic excitation must be considered. The reduced-order system also is more in line with the performance of the original model.
Zhengying LI, Zhengliang LI,.
Control mode selection for modal control of long-span
arch bridge. Front. Struct. Civ. Eng., 2009, 3(4): 401‒406 https://doi.org/10.1007/s11709-009-0052-z
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