| 钢桥塔涡振气动控制措施研究 |
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| 引用本文： | 朱乐东,张宏杰,张海.钢桥塔涡振气动控制措施研究[J].振动工程学报,2011,24(6). |
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| 作者姓名： | 朱乐东 张宏杰 张海 |
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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;同济大学桥梁结构抗风技术交通行业重点实验室,上海200092;同济大学桥梁工程系,上海200092
2. 同济大学土木工程防灾国家重点实验室,上海200092;同济大学桥梁工程系,上海200092 |
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| 基金项目： | 国家自然科学基金资助项目(50978204) |
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| 摘 要： | 杭州之江大桥桥塔为曲线型钢桥塔,刚度与阻尼较小,桥塔自立状态出现涡振的可能性较大.为确定桥塔的涡振风速锁定区间及涡振振幅,进行了全塔气弹模型试验.试验结果显示,在横桥向来流的作用下,桥塔顺桥向涡振振幅过大,需要采取气动控制措施加以控制.试验中所采用的气动措施包括:在桥塔凹角处增加扰流栏杆、多孔角型扰流器和多孔扰流板等控制措施.进一步的试验结果显示,多孔扰流板的涡振控制效果显著,能有效降低涡振振幅,满足规范的限值要求.多孔扰流板的减振机理是其允许适量的气流穿过其孔洞,从而扰乱或削弱桥塔两侧角部有规律的旋涡脱落.
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| 关 键 词： | 斜拉桥 钢桥塔 涡振 气动控制措施 风洞试验 |
Aerodynamic mitigation measures for vortex-induced vibration of steel tower |
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| ZHU Le-dong
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ZHANG Hong-jie
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ZHANG Hai.Aerodynamic mitigation measures for vortex-induced vibration of steel tower[J].Journal of Vibration Engineering,2011,24(6). |
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| Authors: | ZHU Le-dong ZHANG Hong-jie ZHANG Hai |
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| Affiliation: | ZHU Le-dong1,2,3,ZHANG Hong-jie1,ZHANG Hai1,3(1.State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China,2.Key Laboratory for Wind Resistance Technology of Bridges,Ministry of Transport,3.Department of Bridge Engineering,China) |
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| Abstract: | The tower of Hangzhou Zhijiang Bridge is a curved steel tower with lower stiffness and damping.Its free-standing construction state is thus liable to vortexinduced vibration.An aeroelastic model test of full tower was carried out to determine the vibration amplitude and the corresponding lock-in range of wind speed.The test results show that the amplitude of the longitudinal vortex-induced vibration is excessive and needs to reduce through proper aerodynamic measures.The aerodynamic measures investigated in... |
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| Keywords: | cable-stayed bridge steel tower vortex-induced vibration aerodynamic measures wind tunnel test |
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