| Parametrically excited oscillation of stay cable and its control in cable-stayed bridges |
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| 作者姓名： | 孙炳楠 汪至刚 高赞明 倪一清 |
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| 作者单位： | Department of Civil Engineering，Zhejiang University，Department of Civil Engineering Zhejiang University，Department of Civil & Structural Engineering，The Hong Kong Polytechnic University，Department of Civil & Structural Engineering，The Hong Kong Polytechnic University Hangzhou 310027，China，Hangzhou 310027，China，Hong Kong，China，Hong Kong，China |
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| 基金项目： | ProjectsupportedbyNationalNaturalScienceFoundationofChina(No .5 99780 44 ) |
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| 摘 要： | ＩＮＴＲＯＤＵＣＴＩＯＮＣａｂｌｅ ｓｔａｙｅｄｂｒｉｄｇｅｓａｒｅｗｉｄｅｌｙａｐｐｌｉｅｄｉｎｍｏｄｅｒｎｂｒｉｄｇｅｓｔｒｕｃｔｕｒａｌｓｙｓｔｅｍ .Ｔｈｅｌａｒｇｅｓｔｓｐａｎｏｆｃａｂｌｅ ｓｔａｙｅｄｂｒｉｄｇｅｉｓｃｌｏｓｅｔｏ 1 0 0 0ｍｗｈｅｎｍａｎｙｎｅｗｍａｔｅｒｉａｌｓａｎｄｔｅｃｈｎｏｌｏｇｉｅｓａｒｅａｐｐｌｉｅｄ.Ｔｈｅｓｔａｙｃａｂｌｅｓａｒｅｉｍｐｏｒｔａｎｔｂｒｉｄｇｅｓｔｒｕｃｔｕｒｅｃｏｍｐｏｎｅｎｔｓｍｏｓｔｐｒｏｎｅｔｏｅｘｈｉｂｉｔｈｉｇｈａｍｐｌｉｔｕ…
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Parametrically excited oscillation of stay cable and its control in cable-stayed bridges |
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| SUN Bing\|nan,WANG Zhi\|gang KO,J.M.,NI,Y.Q.WT.,.BZ.Parametrically excited oscillation of stay cable and its control in cable-stayed bridges[J].Journal of Zhejiang University Science,2003(1). |
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| Authors: | SUN Bing\|nan WANG Zhi\|gang KO JM NI YQ[WT BZ] |
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| Institution: | SUN Bing\|nan,WANG Zhi\|gang KO,J.M.,NI,Y.Q.[WT9.,10.BZ] |
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| Abstract: | This paper presents a nonlinear dynamic model for simulation and analysis of a kind of parametrically excited vibration of stay cable caused by support motion in cable stayed bridges. The sag, inclination angle of the stay cable are considered in the model, based on which, the oscillation mechanism and dynamic response characteristics of this kind of vibration are analyzed through numerical calculation. It is noted that parametrically excited oscillation of a stay cable with certain sag, inclination angle and initial static tension force may occur in cable stayed bridges due to deck vibration under the condition that the natural frequency of a cable approaches to about half of the first model frequency of the bridge deck system. A new vibration control system installed on the cable anchorage is proposed as a possible damping system to suppress the cable parametric oscillation. The numerical calculation results showed that with the use of this damping system, the cable oscillation due to the vibration of the deck and/or towers will be considerably reduced. |
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| Keywords: | Stay cable Cable stayed bridge Parametric vibration Vibration control Support excitation |
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