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首页> 外文期刊>Journal of Wind Engineering and Industrial Aerodynamics: The Journal of the International Association for Wind Engineering >Interference effects on wind loading of a row of closely spaced tall buildings
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Interference effects on wind loading of a row of closely spaced tall buildings

机译：排成一排的高层建筑对风荷载的干扰效应

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Interference effects on a row of square-plan tall buildings arranged in close proximity are investigated with wind tunnel experiments. Wind forces and moments on each building in the row are measured with the base balance under different wind incidence angles and different separation distances between buildings. As a result of sheltering, inner buildings inside the row are found to experience much reduced wind load components acting along direction of the row (x) at most wind angles, as compared to the isolated building situation. However, these load components may exhibit phenomena of upwind-acting force and even negative drag force. Increase in x-direction wind loads is observed on the upwind edge building when wind blows at an oblique angle to the row. Other interference effects on y-direction wind loads and torsion are described. Pressure measurements on building walls and numerical computation of wind flow are carried out at some flow cases to explore the interference mechanisms. At wind angle around 30 degrees to the row, wind is visualized to flow through the narrow building gaps at high speeds, resulting in highly negative pressure on associated building walls. This negative pressure and the single-wake behavior of flow over the row of buildings provide explanations for the observed interference effects. Interference on fluctuating wind loads is also investigated. Across-wind load fluctuations are much smaller than the isolated building case with the disappearance of vortex shedding peak in the load spectra. Buildings in a row thus do not exhibit resonant across-wind response at reduced velocities around 10 as an isolated square-plan tall building. (c) 2008 Elsevier Ltd. All rights reserved.
机译：通过风洞实验研究了对排成一排的方形高层建筑的干扰影响。排中每栋建筑物上的风力和力矩都是通过基础天平在不同的风入射角和建筑物之间的间隔距离下进行测量的。作为遮挡的结果，与孤立的建筑情况相比，发现行内的内部建筑物在大多数风角下沿行（x）方向作用的风荷载分量大大减少。但是，这些载荷分量可能会表现出上风作用力甚至负阻力的现象。当风以倾斜角度吹向行时，在上风边缘建筑物上观察到x方向的风荷载增加。描述了对y方向风荷载和扭转的其他干扰影响。在某些流动情况下，对建筑物墙壁上的压力进行了测量，并对风流进行了数值计算，以探讨干扰机理。在与行成30度左右的风角下，可视化地看到风以高速流过狭窄的建筑物缝隙，从而在相关建筑物的墙壁上产生很高的负压。这种负压和一排建筑物的流动的单次唤醒行为为观察到的干扰效应提供了解释。还研究了风荷载波动的干扰。跨风荷载波动比孤立的建筑案例要小得多，在荷载谱中涡旋脱落峰消失了。因此，作为隔离的方形高层建筑，成排的建筑物在速度降低约10时不会表现出共振的横风响应。 （c）2008 Elsevier Ltd.保留所有权利。

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