Internal pressures in a full-scale test enclosure with windward wall openings

Humphreys, Mitchell T., Ginger, John D., and Henderson, David J. (2019) Internal pressures in a full-scale test enclosure with windward wall openings. Journal of Wind Engineering and Industrial Aerodynamics, 189. pp. 118-124.

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Abstract

A single opening on the windward wall of a building often contributes to the critical wind loading structural design criterion. This paper describes internal pressure fluctuations in a sealed Full-Scale Test Enclosure for a range of single openings configurations induced by atmospheric wind flow, to understand the influence single opening size (i.e. S*) has on the design internal pressure. The internal pressure fluctuations are shown to be influenced by the size of the opening (S*), Helmholtz resonance was observed for S* > 0.8. Peak and standard deviation internal pressures are amplified by about 5% as S* > 0.8. Internal pressure fluctuations are attenuated when S* < 0.5. An analysis in this study shows loss coefficients CL increasing with increasing opening area (0.8 < S* < 4) between 10 to and 20, and inertial coefficients CI between 1.4 to and 1.5. Multiple small openings on a single wall representative of background porosity (or envelope leakage) restricts the flow in and out of the building, damping the internal pressure fluctuations and reduces the peak internal pressure.

Item ID: 58733
Item Type: Article (Research - C1)
ISSN: 1872-8197
Keywords: Internal pressure; Single opening; Low-rise buildings; Helmholtz resonance; Full-scale; Loss coefficient; Inertial coefficient
Copyright Information: © 2019 Elsevier Ltd. All rights reserved.
Funders: Australian Research Council (ARC), Australian Steele Institute Ltd, Bushfire and Natural Hazards Cooperative Research Centre (BNHCRC), JDH Consulting, Scott Woolcock Consulting Pty Ltd
Projects and Grants: ARC linkage grant LP150101206
Date Deposited: 26 Jun 2019 04:22
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 100%
SEO Codes: 87 CONSTRUCTION > 8702 Construction Design > 870203 Industrial Construction Design @ 100%
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