考虑山顶地形三维效应某电视塔测力风洞试验
发布时间：2019-02-15 11:40
【摘要】：以位于南京秀山顶部某电视塔为例,为精确考虑三维地形效应对电视塔风荷载设计取值的影响,首先对电视塔周边800 m内的山顶地形进行风洞试验,获取电视塔结构参考高度处的风速修正系数;然后利用高频动态天平测力(HFFB)技术进行不同风向角下电视塔刚体模型测力试验。基于试验结果,提炼出不同风向角下电视塔结构基底等效内力和顶部峰值加速度响应的分布规律,并分析典型最不利风向角下电视塔结构层等效静力风荷载(ESWLs)分布特性。研究结果表明:山顶地形三维效应对于此类电视塔结构风力分布的影响显著。本文试验和相关结论可为此类山顶地形电视塔结构抗风设计提供参考。
[Abstract]:Taking a TV tower at the top of Xiushan Mountain in Nanjing as an example, in order to accurately consider the influence of 3D topographic effect on the design value of wind load of TV tower, a wind tunnel test is carried out on the hilltop topography within 800 m around the tower. The wind speed correction coefficient at the reference height of the TV tower structure is obtained. Then the high frequency dynamic balance (HFFB) technique is used to test the rigid body model of TV tower at different wind angles. Based on the experimental results, the distribution law of the equivalent internal force on the base and the peak acceleration response at the top of the TV tower structure under different wind direction angles are extracted, and the (ESWLs) distribution characteristics of the equivalent static wind load on the television tower structure layer under the typical most unfavorable wind direction angle are analyzed. The results show that the 3D effect of hilltop topography has a significant effect on the wind distribution of this kind of TV tower structure. The experimental results and relevant conclusions can be used as reference for the wind resistant design of this kind of mountaintop topographic TV tower structure.
【作者单位】： 南京航空航天大学航空宇航学院;
【基金】：国家自然科学基金资助项目(U1733129) 江苏省优秀青年基金资助项目(BK20160083)~~
【分类号】：TU312.1
，
本文编号：2423308
[Abstract]:Taking a TV tower at the top of Xiushan Mountain in Nanjing as an example, in order to accurately consider the influence of 3D topographic effect on the design value of wind load of TV tower, a wind tunnel test is carried out on the hilltop topography within 800 m around the tower. The wind speed correction coefficient at the reference height of the TV tower structure is obtained. Then the high frequency dynamic balance (HFFB) technique is used to test the rigid body model of TV tower at different wind angles. Based on the experimental results, the distribution law of the equivalent internal force on the base and the peak acceleration response at the top of the TV tower structure under different wind direction angles are extracted, and the (ESWLs) distribution characteristics of the equivalent static wind load on the television tower structure layer under the typical most unfavorable wind direction angle are analyzed. The results show that the 3D effect of hilltop topography has a significant effect on the wind distribution of this kind of TV tower structure. The experimental results and relevant conclusions can be used as reference for the wind resistant design of this kind of mountaintop topographic TV tower structure.
【作者单位】： 南京航空航天大学航空宇航学院;
【基金】：国家自然科学基金资助项目(U1733129) 江苏省优秀青年基金资助项目(BK20160083)~~
【分类号】：TU312.1
，
本文编号：2423308
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