Effect of opening size and wind speed on internal pressures in full-scale buildings

Humphreys, M.T., Ginger, J.D., and Henderson, D.J. (2020) Effect of opening size and wind speed on internal pressures in full-scale buildings. In: Lecture Notes in Civil Engineering (37) pp. 1061-1069. From: ACMSM25: 25th Australasian Conference on Mechanics of Structures and Materials, 4-7 December 2018, Brisbane, QLD, Australia.

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Abstract

Internal pressures contribute to a significant proportion of the net pressure across a building envelope, which needs to be accurately defined in wind loading standards to optimize structural design. Current quasi-steady criteria for internal pressures in AS/NZS1170.2(2011) is dependent on the ratio of open area on the windward wall to leeward and sidewalls, with no consideration of dynamic (i.e. inertial and damping) effects. This paper shows that the internal to external pressure fluctuation relationship is a function of the opening area to volume parameter, S*=(A^(3/2)/V)(as /U_h^2) and opening area to integral length scale of turbulence parameter, Φ5=(λu /√A). Simple quasi-steady analysis used in AS/NZS1170.2(2011) suggests internal pressure should be equal to the external pressure applied to the opening, however, results here show Cases where peak internal pressures are greater than, equal to and less than the peak external pressure. This is caused by internal pressure resonance and/or damping shown to be a function of S* and Φ_5.

Item ID: 58181
Item Type: Conference Item (Research - E1)
ISBN: 978-981-13-7603-0
ISSN: 2366-2557
Keywords: wind loads, internal pressure, single opening, Helmholtz resonance
Copyright Information: Transfer of Copyright to Springer Nature Singapore Pty Ltd.
Sensitivity Note: Copyright is reserved to Springer Nature Singapore Pte Ltd.
Funders: Australian Research Council (ARC), Australian Steel Institute, Bushfire and Natural Hazards Cooperative Research Centre (BNHCRC)
Projects and Grants: ARC #LP150101206
Date Deposited: 03 Dec 2019 02:07
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 20%
09 ENGINEERING > 0905 Civil Engineering > 090502 Construction Engineering @ 80%
SEO Codes: 86 MANUFACTURING > 8612 Fabricated Metal Products > 861205 Sheet Metal Products @ 40%
86 MANUFACTURING > 8612 Fabricated Metal Products > 861206 Structural Metal Products @ 40%
86 MANUFACTURING > 8612 Fabricated Metal Products > 861201 Coated Metal and Metal-Coated Products @ 20%
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