| Three-dimensional nonlinear flutter analysis of long-span suspension bridges during erection |
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| 作者姓名： | 张新军 孙炳楠 项海帆 |
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| 作者单位： | Department of Civil Engineering，Zhejiang University，Department of Civil Engineering，Zhejiang University，Department of Bridge Engineering，Tongji University Hangzhou 310027，China，Hangzhou 310027，China，Shanghai 200092，China |
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| 基金项目： | ProjectsupportedbyNationalNaturalScienceFoundationofChina(No .5 9895 44 10 )，andChinaPostdoctoralScienceFoundation (No .2 0 0 2 0 3 12 45 ) |
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| 摘 要： | ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｈａｓｂｅｅｎｒｅｃｏｇｎｉｚｅｄｔｈａｔｌｏｎｇ ｓｐａｎｂｒｉｄｇ ｅｓ ,ｃａｂｌｅ ｓｕｐｐｏｒｔｅｄｂｒｉｄｇｅｓｉｎｐａｒｔｉｃｕｌａｒ,ａｒｅｓｕｂｊｅｃｔｔｏｔｈｅｄｙｎａｍｉｃｗｉｎｄａｃｔｉｏｎ .Ｔｈｅａｅｒｏｄｙ ｎａｍｉｃｓｔａｂｉｌｉｔｙ (ｆｌｕｔｔｅｒ)ｏｆｓｕｓｐｅｎｓｉｏｎｂｒｉｄｇｅｓｄｕｒｉｎｇｅｒｅｃｔｉｏｎｉｓａｓｕｂｊｅｃｔｏｆｍａｊｏｒｃｏｎｃｅｒｎｆｏｒｒｅｓｅａｒｃｈｅｒｓａｎｄｅｎｇｉｎｅｅｒｓ .Ａｌｔｈｏｕｇｈｔｈｅｐｅｒｉ…
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Three-dimensional nonlinear flutter analysis of long-span suspension bridges during erection |
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| ZHANG Xin jun,SUN Bing nan,XIANG Hai fanWT.,.BZ.Three-dimensional nonlinear flutter analysis of long-span suspension bridges during erection[J].Journal of Zhejiang University Science,2003(1). |
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| Authors: | ZHANG Xin jun SUN Bing nan XIANG Hai fan[WT BZ] |
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| Institution: | ZHANG Xin jun,SUN Bing nan,XIANG Hai fan[WT9.,10.BZ] |
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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. |
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| Keywords: | Long span suspension bridges Nonlinear flutter analysis Erection stage |
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