External and internal pressure fluctuations on industrial-type buildings

The external and internal pressures on a range of building configurations were studied by carrying out a series of wind tunnel model studies. The studies showed that low internal pressure in nominally sealed buildings compared to external pressure fluctuation at the windward wall opening and magnitude of the internal pressure varied with building porosity. Internal pressure fluctuations in buildings with a dominant opening closely followed the external pressure at the opening. In addition, the magnitude of the internal pressure increased in buildings with a dominant opening compared to that of nominally sealed buildings. The porosity of the building with a dominant opening significantly influenced the internal pressure, with the peak internal pressure being reduced at higher porosity. The measured internal pressure spectra showed an increase of energy close to the Helmholtz resonance frequency and this energy decreased with respect to increasing porosity. Background leakages reduced the internal pressure fluctuations in buildings with a dominant opening, while the Helmholtz resonance occurred at the same frequency.

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9th Asia-Pacific Conference on Wind Engineering

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