| 基于SHMS的润扬悬索桥桥址区强风特性 |
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| 引用本文： | 李爱群,王浩,谢以顺.基于SHMS的润扬悬索桥桥址区强风特性[J].东南大学学报(自然科学版),2007,37(3):508-511. |
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| 作者姓名： | 李爱群 王浩 谢以顺 |
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| 作者单位： | 东南大学混凝土预应力混凝土结构教育部重点实验室,南京,210096 |
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| 基金项目： | 教育部高等学校科技创新工程重大项目培育资金资助项目，国家自然科学基金，国家自然科学基金，东南大学校科研和教改项目，国家高技术研究发展计划(863计划) |
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| 摘 要： | 为了对大桥抗风评估提供可靠依据,润扬悬索桥结构健康监测系统(SHMS)在大桥南塔塔顶和主跨跨中分别安装了风速风向仪.台风"麦莎"突袭江苏时,风速仪记录了经过桥址区的强风样本.经过对实测风速数据的分析,得到了平均风速和风向、风速沿高度变化规律、紊流强度、紊流功率谱密度函数等强风特性.分析结果表明,桥址区实测"麦莎"台风风速沿高度变化规律与规范吻合良好,紊流强度较高;但水平紊流功率谱密度函数与Kaimal谱不太吻合,低频段偏低,高频段偏高.
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| 关 键 词： | 悬索桥 结构健康监测系统 台风 风速 风向 紊流强度 紊流功率谱 |
| 文章编号： | 1001-0505（2007）03-0508-04 |
| 修稿时间： | 2006-10-09 |
Experimental study on strong wind characteristics of Runyang Suspension Bridge based on SHMS |
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| Li Aiqun,Wang Hao,Xie Yishun.Experimental study on strong wind characteristics of Runyang Suspension Bridge based on SHMS[J].Journal of Southeast University(Natural Science Edition),2007,37(3):508-511. |
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| Authors: | Li Aiqun Wang Hao Xie Yishun |
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| Institution: | Key Laboratory of Concrete and Prestressed Concrete Structures of Ministy of Education, Southeast University, Nanjing 210096, China |
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| Abstract: | In order to provide reliable basis for wind resistant evaluation of Runyang Suspension Bridge(RSB),two anemometers were installed in structural healthy monitoring system(SHMS) of RSB,one was on the top of the south tower and the other in the middle of the main span.When typhoon Matsa passed through Jiangsu,it was wholly recorded at the RSB spot by the two anemometers.The measurement data were analyzed to obtain the mean wind velocity and direction,the variation of wind speed with height,the turbulence intensity and power spectrum,etc.It is found that the variation of wind speed with height can accord with the formula of criterion and the turbulence intensity is larger than normal,but the turbulence power spectrum can not fit the Kaimal spectrum well,it is a little smaller in low frequency domain and a little larger in high frequency domain. |
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| Keywords: | suspension bridge structural health monitoring system(SHMS) typhoons wind speed wind direction turbulence intensity turbulence power density |
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