Experimental investigation of wind pressure fields on buildings with gabled roofs having different pitch angles

A wind tunnel study was carried out to investigate wind pressure distributions on the three gables roofed building models of 15°,30°,and 45° roof pitch and determine the effect of roof pitch on the external wind pressure. the surface pressure measurements were performed on the roofs and side walls of the building models facing a turbulent wind of 15 m/s and the values of mean and peak pressure coefficients were obtained for wind angles from 0° to 360° with 15° increment. the pressure distributions on the roofs are significantly influenced by the roof pitch. the roof pitch of 15° produces more critical suction on the roof than those of 30° and 45° roof pitches. the highest peak suction is experienced with 15° pitched roof at the windward roof corner for the wind angle of 15°. pressure contour distributions on the building models show that wind angle of 45° is more critical than wind angles of 0° and 90°.