Experimental study on Windbreak performance of Wind Barriers on Bridge

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (8) : 78-82.

Li Bo1,2 Zhang Jian1 Yang Qingshan1,2

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Abstract

Velocity measured wind tunnel tests have been carried out to investigate the windbreak performance of wind barriers on bridge considering different porosity and width of barrier, the simulation method of wind barrier in wind tunnel and evaluating parameter of windbreak performances are discussed in the paper. Tests results show that, the shielding region of wind barriers is about 2.0H (H is the height of wind barrier), and wind speed reduce a lot when the height below 1.0H. Turbulence intensity of flow on the downstream of wind barrier reaches the maximum at the height of 1.0H. Windbreak performance depends on porosity of wind barrier, wind speed will rise and turbulence intensity will decrease with porosity increasing. Width of barrier seems to have no relationship with its windbreak performance, when porosity is the same, the effect of width of barrier can be ignored. Wind speed reduction coefficient can be used to evaluate windbreak performance, which is defined by equivalence of pressure.

Key words

wind barrier / windbreak / bridge / wind tunnel test / porosity / width of barrier

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Li Bo1,2 Zhang Jian1 Yang Qingshan1,2. Experimental study on Windbreak performance of Wind Barriers on Bridge[J]. Journal of Vibration and Shock, 2016, 35(8): 78-82

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