Experimental study on wind-induced internal pressure for a building with multiple openings in windward wall

XU Hai-wei;YU Shi-ce;LOU Wen-juan

Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (15) : 82-86.

PDF(1583 KB)
PDF(1583 KB)
Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (15) : 82-86.
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Experimental study on wind-induced internal pressure for a building with multiple openings in windward wall

  • XU Hai-wei ,YU Shi-ce ,LOU Wen-juan
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Abstract

In order to understand wind-induced dynamic characteristic of internal pressure response for a building with multiple openings in windward wall, unsteady form of Bernoulli equation was applied to deduce internal pressure governing equation for this multiple opening situation and equivalent damping ratio was derived through linearization of the governing equation. Models with single and double openings in windward wall were investigated in wind tunnel, respectively. For each opening case, internal pressure was measured for six different internal volumes. The study shows the governing equation is of high precisions in predicting internal pressure fluctuation. Increased internal volume will lead to lower resonance frequency and larger damping ratio of internal pressure, but has little effect on mean internal pressure. When compared with single opening case, double opening enlarges both Helmholtz frequency and equivalent damping ratio, therefore R.M.S ratios between internal and external pressure in double opening model is smaller than single opening situation at most wind azimuths. However, the maximum R.M.S ratios of internal to external pressure for single and double opening models are found at wind angles of 75° and 60°, respectively.

Key words

opening structure / internal pressure response / multiple openings in windward wall / wind tunnel test / equivalent damping ratio

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XU Hai-wei;YU Shi-ce;LOU Wen-juan. Experimental study on wind-induced internal pressure for a building with multiple openings in windward wall[J]. Journal of Vibration and Shock, 2014, 33(15): 82-86
PDF(1583 KB)

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