| 缆索承重桥梁桥塔自立状态涡激共振及其控制 |
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| 引用本文： | 葛耀君,丁志斌,赵林.缆索承重桥梁桥塔自立状态涡激共振及其控制[J].同济大学学报(自然科学版),2007,35(8):1008-1012. |
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| 作者姓名： | 葛耀君 丁志斌 赵林 |
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| 作者单位： | 1. 同济大学,土木工程防灾国家重点实验室,上海,200092
2. 同济大学,土木工程防灾国家重点实验室,上海,200092;北京中交桥宇科技有限公司,北京,100010 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金 |
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| 摘 要： | 在建的某大跨度悬索桥位处东南沿海,桥塔施工时期处于台风多发期,设计风速较高.对比其他同类型的桥塔,该桥桥塔发生涡振的可能性较大,有必要在初设计阶段评价桥塔涡振性能,并考虑采取有针对性的涡振控制措施.通过裸塔气动弹性模型风洞试验,分析了桥塔在多种工况中的涡振响应特点,表明涡振效应不容忽略.比较了气动措施、机械措施以及桥塔动力特性形态和风环境因素对于涡振响应的影响.
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| 关 键 词： | 缆索承重桥梁 桥塔自立状态 涡激共振 气动措施 机械措施 |
| 文章编号： | 0253-374X（2007）08-1008-05 |
| 修稿时间： | 2005-11-23 |
Vortex-Induced Vibration and Reduction of Free-Standing Pylons of Cable-Supported Bridges |
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| GE Yaojun,DING Zhibin,ZHAO Lin.Vortex-Induced Vibration and Reduction of Free-Standing Pylons of Cable-Supported Bridges[J].Journal of Tongji University(Natural Science),2007,35(8):1008-1012. |
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| Authors: | GE Yaojun DING Zhibin ZHAO Lin |
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| Institution: | 1. State Key Laboratory for Disaster Reduction in Civil Engineexing, Tongji University, Shanghai 200092, China; 2. Beijing China Communications Construction Company Science and Technology Ltd. Co., Beijing 100010, China |
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| Abstract: | A long-span suspension bridge located at southeast coastal area of China,a typical typhoon-prone region,faces a risk of vortex-induced vibration.It's necessary to evaluate the possibility of vortex-induced vibration of the free-standing pylon of the cable-supported bridge and to propose corresponding suppression measures.Based on a wind tunnel testing of an aeroelastic model of the free-standing bridge pylon,a comparative study is conducted on the performance of the vortex-induced vibration of various cases.Results show that the effects of vortex-induced vibration should not be ignored during the construction stage of free-standing pylons.Some proposals about suppression efficiency of different measures are put forward,including mechanical measures,aerodynamic measures,structural dynamic modes and wind field environment. |
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| Keywords: | cable-supported bridge free-standing pylon vortex-induced vibration mechanical measures aerodynamic measures |
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