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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 >Effects on surface roughness for wind pressure on glass and cladding of buildings
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Effects on surface roughness for wind pressure on glass and cladding of buildings

机译：建筑物玻璃和覆层的风压对表面粗糙度的影响

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摘要

High rise multiple dwelling houses with balconies have been frequently constructed in recent years because of the concentration of population in a big city. The wall surface of buildings with balconies and mullions, becomes extremely rough. To the present, wind loading on glass and cladding have been mainly derived from tests on buildings with smooth surfaces. However, effects of reduction of wind pressures are considerable for walls with surface roughnesses such as balconies. The paper describes the results of an experimental study carried out in a Gottingen-type wind tunnel under uniform flow an boundary layer flow over urban terrain. The basic model of study represented square buildings 75 m high and 25 km wide in a scale of 1/300. The surface roughness attached on all building walls was: uniform roughness of maximum size equal to 0.21 m in full scale, and three kinds of balconies of 0.63, 1.25 and 2.5 m wide without mullions, and 0.63 m wide balconies with mullions. The experimental data indicate that wind pressures were remarkably affected by the surface roughness, particularly near the leading edge of the side wall on which local severe peak pressures decrease with increasing roughness, and that the increment of roughness restrains the development of conical vortices formed at the lower and higher zone of buildings from discussion of power spectra and root-coherence for fluctuating wind pressures. The paper quantifies the effects and makes appropriate recommendations.
机译：近年来，由于人口集中在一个大城市，经常建造带有阳台的高层多层住宅。带有阳台和竖框的建筑物的墙壁表面非常粗糙。迄今为止，玻璃和覆层上的风荷载主要来自具有光滑表面的建筑物的测试。然而，降低风压的效果对于具有阳台等表面粗糙度的墙壁而言是相当大的。本文描述了在哥廷根型风洞中在均匀流动和边界层流动在城市地形上进行的实验研究的结果。基本的研究模型代表高度为75 m，宽度为25 km的正方形建筑，比例为1/300。所有建筑物墙壁上附着的表面粗糙度为：最大尺寸的均匀粗糙度全尺寸等于0.21 m，以及三种不带竖框的阳台，分别为0.63、1.25和2.5 m宽，以及带竖框的0.63 m宽的阳台。实验数据表明，风压受到表面粗糙度的显着影响，特别是在侧壁的前缘附近，侧壁的局部峰值压力随着粗糙度的增加而降低，并且粗糙度的增加抑制了在表面处形成圆锥形涡旋的发展。通过讨论功率谱和风压波动的根源相干性来讨论建筑物的较低和较高区域。本文量化了影响并提出了适当的建议。

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