Internal pressures in buildings with a dominant opening and background porosity

Kim, P.Y., and Ginger, J.D. (2013) Internal pressures in buildings with a dominant opening and background porosity. Wind & Structures, 16 (1). pp. 47-60.

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Abstract

A dominant opening in a windward wall, which generates large internal pressures in a building, is a critical structural design criterion. The internal pressure fluctuations are a function of the dominant opening area size, internal volume size and external pressure at the opening. In addition, many buildings have background leakage, which can attenuate internal pressure fluctuations. This study examines internal pressure in buildings for a range of dominant opening areas, internal volume sizes and background porosities. The effects of background porosity are incorporated into the governing equation. The ratio of the background leakage area AL to dominant opening area AW is presented in a non-dimensional format through a parameter, Φ₆ = A(L)/A(W). Background porosity was found to attenuate the internal pressure fluctuations when Φ₆ is larger than 0.2. The dominant opening discharge coefficient, k was estimated to lie between 0.05 to 0.40 and the effective background porosity discharge coefficient K(L), was estimated to be between 0.05 to 0.50.

Item ID: 26212
Item Type: Article (Research - C1)
ISSN: 1598-6225
Keywords: background porosity; internal pressure; discharge coefficient; Helmholtz resonance; dominant opening; building
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Date Deposited: 09 Apr 2013 01:58
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 100%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870203 Industrial Construction Design @ 40%
87 CONSTRUCTION > 8702 Construction Design > 870204 Residential Construction Design @ 60%
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