| Aerodynamic stability of cable-stayed bridges under 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： | School of Civil Engineering and Architecture，Zhejiang University of Technology，Hangzhou 310014，China，School of Civil Engineering and Architecture，Zhejiang University，Hangzhou 310027，China，Department of Bridge Engineering，Tongji University，Shanghai 200092，China |
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| 基金项目： | 中国博士后科学基金，浙江省自然科学基金 |
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| 摘 要： | INTRODUCTION Long-span cable-stayed bridges under service andparticular construction conditions are very susceptibleto wind action due to their great flexibility, so thewind stability (aerodynamic stability or flutter stabil-ity) is becoming a major concern in the design andconstruction phrases. As compared with the servicecondition, although the period of erection is not toolong, the structural stiffness of cable-stayed bridgesunder erection is greatly reduced, and consequentlythey be…
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| 关 键 词： | 空气动力学 稳定性 悬索桥 悬臂 几何学 |
| 收稿时间： | 5 September 2006 |
Aerodynamic stability of cable-stayed bridges under erection |
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| Zhang Xin-jun,Sun Bing-nan,Xiang Hai-fan.Aerodynamic stability of cable-stayed bridges under erection[J].Journal of Zhejiang University Science,2005,6(3):175-180. |
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| Authors: | Zhang Xin-jun Sun Bing-nan Xiang Hai-fan |
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| Institution: | (1) School of Civil Engineering and Architecture, Zhejiang University of Technology, 310014 Hangzhou, China;(2) School of Civil Engineering and Architecture, Zhejlang University, 310027 Hangzhou, China;(3) Department of Bridge Engineering, Tongji University, 200092 Shanghai, China |
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| Abstract: | In this work, nonlinear multimode aerodynamic analysis of the Jingsha Bridge under erection over the Yangtze River is conducted, and the evolutions of structural dynamic characteristics and the aerodynamic stability with erection are numerically generated. Instead of the simplified method, nonlinear multimode aerodynamic analysis is suggested to predict the aerodynamic stability of cable-stayed bridges under erection. The analysis showed that the aerodynamic stability maximizes at the relatively early stages, and decreases as the erection proceeds. The removal of the temporary piers in side spans and linking of the main girder to the anchor piers have important influence on the dynamic characteristics and aerodynamic stability of cable-stayed bridges under erection. |
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| Keywords: | Cable-stayed bridge Erection stage Aerodynamic stability Nonlinear multimode aerodynamic analysis |
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