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| 洞庭湖大桥桥塔塔顶风场与风压特性试验研究 |
| Investigation into the characteristics of wind and wind pressure of the tower top of Dongting Lake Bridge |
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| DOI： |
| 中文关键词: 桥塔 现场实测 风压系数 湍流度 |
| 英文关键词: bridge tower field measurement wind pressure coefficients turbulence intensity |
| 基金项目:交通运输部科技项目(2011318824140)；湖南省自然科学基金资助项目（14JJ4047） |
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| 中文摘要: |
| 对岳阳洞庭湖大桥中塔塔顶风场和风压进行现场实测，得到了桥塔塔顶风压和风速、风向时程.分析了风场特性参数、塔顶风压分布、平均风压系数和脉动风压系数的变化规律.分析结果表明：迎风面各点平均风压系数变化趋势一致，迎风面脉动风压系数较大，背风面脉动风压系数相对较小，在同一面上脉动风压系数差别较小；塔顶周围风场平均湍流度较小且脉动风压系数是风场湍流度的2~3倍. |
| 英文摘要: |
| Based on field measurement of the wind field and wind pressures of the tower top of Dongting Lake Bridge,wind pressures, wind speed and direction time series were obtained. And the characteristics of wind field,the distribution of wind pressures, the mean wind pressure coefficients and fluctuating wind pressure coefficients of the tower top were analysed.The results show that the change of mean wind pressure coefficients of each point of windward side tends to be identical,that the fluctuating wind pressure coefficients of windward is relatively higher and the leeward one is relatively lower,that there is less difference in the fluctuating wind pressure coefficients on the same side and that the fluctuating wind pressure coefficients is two to three times as large as the turbulence. |
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