Computational modelling in the prediction of building internal pressure gain functions.

This paper describes a methodology based on computational and analytical modelling techniques in the prediction of building internal pressure gain functions. It first involves computational modelling of the transient response following a sudden opening, which predicts both the Helmholtz frequency and the damping characteristics fairly accurately. The parameter derived by fitting the analytical model to the computed response are then used in the prediction of the gain function. Good agreement is obtained between measured and predicted internal pressure gain functions for the case of a cylinder and a 1 : 50 scale model of the TTU test building.