Abstract
This paper discusses the development of an analytic model to describe both the transient and resonant behaviour of internal pressure in flexible low-rise residential and light industrial buildings in the presence of an opening. The model and a linear analogy are used to obtain the response of internal pressure and the roof structure in a typical building and it is shown that building flexibility produces double resonance and a downward shift in the natural (Helmholtz) frequency of internal pressure while increasing the damping. This partially explains the observed vigorous dynamic behaviour of roofs before failure in buildings with a windward opening during the passage of tropical cyclones. In such storms the wind is very turbulent and possesses significant energy at the higher frequency end of the spectrum where typical Helmholtz and structural frequencies lie.
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More From: Journal of Wind Engineering & Industrial Aerodynamics
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