Characteristics of static pressure on the ground

When wind pressures on a building in natural wind are estimated, a static pressure measured with a manhole, a Pitot static tube, or a static tube of the disk type, has been used as the reference pressure. However, there are a few studies on the detailed characteristics of the static pressure itself in natural wind. We measured the static pressures on the ground with accurate pressure transducers of the absolute pressure type and investigated the characteristics of the static pressure on the ground. The relationship between the static pressure on the ground and the internal pressure of these prism models on the ground was also investigated. We found that static pressures on the ground fluctuated to an extent comparable with the wind pressures on the prism model and that lower frequency components of the static pressures on the ground were strongly correlated with the velocity pressures of the large-scale winds high above the ground, which could be accounted for by Bernoulliʹs theorem.