Influence of Porosity on Drag Coefficient of Perforated Road Signs

To ensure the structural stability of road signs against strong gusts wind, perforated with sign boards at regular intervals have been adopted for use in urban infrastructure. However, ASCE 7-22 standards do not consider drag coefficient low porosity, i.e., less than 30%. Therefore, here, computational fluid dynamics (CFD) analysis was performed to analyze a porosity The aspect and clearance ratios, which are width/height ratio height sign/its distance from ground, respectively, were set as parameters. Subsequently, 30% calculated, effect wind speed on analyzed. Results show that decreased increased, reduction up 0.85 times. Furthermore, high exhibited significant coefficient. For signs, does clear correlation speed.