Three-dimensional nonlinear flutter analysis of long-span suspension bridges during erection |
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| Authors: | Email author" target="_blank">Zhang?Xin-junEmail author Sun?Bing-nan Xiang?Hai-fan |
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| Institution: | (1) Department of Civil Engineering, Zhejiang University, 310027 Hangzhou, China;(2) Department of Bridge Engineering, Tongji University, 200092 Shanghai, China |
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| Abstract: | In this work, the aerodynamic stability of the Yichang Suspension Bridge over Yangtze River during erection was determined
by three-dimensional nonlinear flutter analysis, in which the nonlinearities of structural dynamic characteristics and aeroelastic
forces caused by large deformation are fully considered. An interesting result obtained was that the bridge was more stable
when the stiffening girders were erected in a non-symmetrical manner as opposed to the traditional symmetrical erection schedule.
It was also found that the severe decrease in the aerodynamic stability was due to the nonlinear effects. Therefore, the nonlinear
factors should be considered accurately in aerodynamic stability analysis of long-span suspension bridges during erection.
Project supported by National Natural Science Foundation of China(No. 598954410), and China Postdoctoral Science Foundation
(No. 2002031245) |
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| Keywords: | Long-span suspension bridges Nonlinear flutter analysis Erection stage |
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