ABSTRACT
In this chapter, the fundamentals of the prediction of wind-induced internal pressures within enclosed buildings are discussed. A 'risk-consistent' internal pressure, allowing for a number of possible opening scenarios in a building envelope, is introduced in this chapter. Although originally applied to the situation where the external pressures are caused by acoustic sources, it can be applied to the case of external wind pressures, 'driving' the internal pressures within a building. An area of background leakage of about 50% of that of the opening on the windward wall resulted in a reduction in the fluctuating internal pressure coefficient of about 25%. A probabilistic approach to the prediction of internal pressures is explored in the chapter. 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.
