Experimental study on windbreak performance of wind barriers on bridge

被引：0
|
作者：
Li B. [1 ,2 ]
Zhang J. [1 ]
Yang Q.-S. [1 ,2 ]
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
来源：
| 1600年 / Chinese Vibration Engineering Society卷 / 35期
关键词：
Bridge; Porosity; Width of barrier; Wind barrier; Wind tunnel test; Windbreak;
D O I：
10.13465/j.cnki.jvs.2016.08.013
中图分类号：
学科分类号：
摘要：
Wind tunnel velocity tests have been carried out to investigate the windbreak performance of wind barriers on bridges considering different barrier porosities and widths, the wind barrier wind tunnel simulation method and evaluation parameter of windbreak performances are discussed in the paper. Test results show that the shielding region of wind barriers is about 2.0 H (H is the height of wind barrier) and that wind speed decreases significantly when the height is below 1.0 H. The turbulence intensity of the downstream flow on the wind barrier reaches the maximum at a height of 1.0 H. Windbreak performance depends on porosity of wind barrier, wind speed will rise and turbulence intensity decreases with increasing porosity. Barrier width seems to have no relationship with windbreak performance; when porosity is the same, the effect of barrier width can be ignored. The wind speed reduction coefficient can be used to evaluate windbreak performance, which is defined by pressure equivalence. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：78 / 82
页数：4
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