Effects of terrain and length-width ratio on wind loads of flat-roof building

被引：0
|
作者：
Chen B. [1 ,2 ]
Huang Z. [1 ,2 ]
Yin Z. [1 ,2 ]
Yang Q. [2 ,3 ]
机构：
[1] School of Civil Engineering, Beijing Jiaotong University, Beijing
[2] Beijing's Key Laboratory of Structural Wind Engineering and Urban Wind Environment, Beijing Jiaotong University, Beijing
[3] School of Civil Engineering, Chongqing University, Chongqing
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2019年 / 40卷 / 07期
关键词：
Flat-roof building; Length-width ratio; Terrain; Wind pressure coefficient; Wind tunnel test;
D O I：
10.14006/j.jzjgxb.2017.0574
中图分类号：
学科分类号：
摘要：
With wind tunnel tests, the effects of terrain and building length-width ratio on wind loads of buildings with a flat roof were investigated, in terms of the mean, the RMS and the peak pressure coefficients, and the mean lift coefficients on the roof. The results demonstrate that the terrain has little effects on the mean coefficients on the roof, but has significant effects on the RMS and peak pressure coefficients. The RMS pressure coefficients on the windward separation area of the typical roof section in terrain C is about 1.5 times those in terrain A, and the distance from the windward edge to the flow reattachment is 0.7H, 0.4H and 0.3H(H is height of the model), respectively, in terrain A, B and C when the wind direction is orthogonal to the short edge of the building. Increasing the building length along the wind direction has little effects on the pressure coefficients along the typical roof sections, makes more area of the roof be covered by the flow reattachment, and reduces the mean lift force coefficient on the roof. Both the terrain and the building length-width ratio have significant effects on the most unfavorable peak pressure coefficients for all wind directions at the roof corner area, but have little effects on those at the middle and center roof areas. For the roof corner area, the most unfavorable peak pressure coefficients in terrain C is larger than those in terrain A and B, and those for the roof with a length-width ratio of 2.5 is 20% larger than those with a length-width ratio of 1.5 and 2.0. © 2019, Editorial Office of Journal of Building Structures. All right reserved.
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页码：54 / 61
页数：7
相关论文
共 15 条
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