Internal pressures - Wind Loading of Structures - page 163

6.6 Summary
The topic of internal pressures produced by wind has been covered in this chapter. The
relevant non-dimensional parameters are introduced, and the response time of the interior
of a building or a single room to a sudden increase in external pressure at an opening has
been evaluated.
The dynamic response of an internal volume to excitation by a sudden generation of a
windward wall opening, or by turbulence, using the Helmholtz resonator model, which
includes inertial effects, has been considered. The effect of multiple windward and
leeward openings on mean and fluctuating internal pressures is introduced. The case of a
nominally sealed building with distributed porosity is also considered.
The requirements for modelling of internal pressures in wind-tunnel studies have also
been mentioned; however, the full details of this are given in Chapter 7.
Most of the results in this chapter have been validated by wind-tunnel studies and,
more importantly, by full-scale measurements (e.g. Ginger et al., 1997).
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