1.湘潭大学土木工程与力学学院,湖南 湘潭 411105
2.中建三局第一建设工程有限责任公司,湖北 武汉 430040
涂佳黄(1982—),男,副教授,博士。主要从事结构风工程与流固耦合方面的研究。E‑mail:tujiahuang1982@163.com
纸质出版:2022-04-28
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涂佳黄,吕海宇,唐彪等.下击暴流下单立柱三面式广告牌风压特性研究[J].防灾减灾工程学报,2022,42(02):320-329.
TU Jiahuang,LYU Haiyu,TANG Biao,et al.Study on Wind Pressure Characteristics of Billboard under the Thunderstorm Downburst[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(02):320-329.
涂佳黄,吕海宇,唐彪等.下击暴流下单立柱三面式广告牌风压特性研究[J].防灾减灾工程学报,2022,42(02):320-329. DOI: 10.13409/j.cnki.jdpme.202006003.
TU Jiahuang,LYU Haiyu,TANG Biao,et al.Study on Wind Pressure Characteristics of Billboard under the Thunderstorm Downburst[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(02):320-329. DOI: 10.13409/j.cnki.jdpme.202006003.
基于计算流体动力学理论,采用雷诺平均方法对下击暴流作用下单立柱三面式广告牌结构风压分布进行三维数值计算。首先,通过模拟下击暴流风场风剖面验证计算模型及参数准确性。然后,主要分析径向距离和风向角对广告牌风压分布特性的影响。数值结果表明:径向距离和风向角对广告牌风压分布特性有较强影响,当结构置于
R=
0
D
jet
时,广告牌内外表面均承受较大压力;而
R=
1
D
jet
时,广告牌各面板所受压力达到最大值,然后随径向距离逐渐增大其数值不断减小。随风向角不断增大,广告牌各面板前后叠加风压系数逐渐增大,广告牌迎风面风压系数分布由不对称逐渐转变为对称分布,受高压区域面积也随之逐渐增大。
Based on the computational fluid dynamic theory, the wind pressure characteristics of the billboards were investigated numerically under thunderstorm downburst by using Reynolds Average Navier-Stokes(RANS) model. The accuracy of the calculation model and parameters were verified firstly by simulating the wind profile of the downburst wind field. After that the effects of radial position and wind direction on the wind pressure coefficients of the billboards were analyzed emphatically. Results indicate that the radial position and wind direction have great influences on the wind pressure distribution of the billboard. All surfaces of the model are subjected to greater positive pressure at R=0
D
jet
and reach the peak pressure value at R=1
D
jet
,then gradually decrease with the radial distance increasing. The superimposed wind pressure coefficient of the front and rear surfaces rises as the wind direction increases. Meanwhile,the wind pressure coefficient distribution on the windward surface changes from asymmetrical to symmetrical,and the area under high pressure gradually increases.
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