Internal pressures - The dominant windward opening case: a review

Holmes, J.D., and Ginger, J.D. (2012) Internal pressures - The dominant windward opening case: a review. Journal of Wind Engineering and Industrial Aerodynamics, 100 (1). pp. 70-76.

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Abstract

A building with a dominant opening in a wall may experience internal pressures equal to, or greater than, the external wind pressures in a severe windstorm. This is a critical design case in severe wind events, during which accidental openings may be produced by windborne debris or by direct wind loading.

This paper reviews previous work on the prediction of fluctuating and peak internal pressures arising from a dominant opening on a windward wall, and summarizes proposed, or current, code formulations in a unified non-dimensional format. Experimental data from a number of sources are plotted together, and are found to fall into two groups, depending on the turbulence intensity in the approach flow.

It is shown that the proposed relationships for the ratio of internal to external pressure fluctuations differ considerably, depending on the assumptions made. An intermediate relationship, which agrees well with experimental data in approach flow with turbulence intensities representative of atmospheric wind flow in developed boundary layers, is presented, and a design example of its application is given.

Item ID: 21013
Item Type: Article (Refereed Research - C1)
Keywords: Helmholtz resonance; internal; opening; pressure; design codes; standards
ISSN: 1872-8197
Date Deposited: 14 May 2012 06:08
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 100%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 100%
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