Influence of structural details on wind uplift capacity of standing seam galvalume roofs

Standing seam metal roof systems are widely used in various types of large-scale public buildings, but the key parameters influencing their wind resistance mechanisms have not been fully clarified. Elucidating these effects is crucial for enhancing the wind reliability and durability of the roofing system. This paper presents rigid wind tunnel tests and dynamic as well as static metal roof wind uplift tests on an airport traffic center, and investigates the influence of detailed structural parameters on the wind uplift capacity using numerical simulations. The results show that the wind load on the large-span roof cantilevered section of the traffic center is very large, and the most unfavorable negative wind pressure extremes for the areas without and with anti-wind clips are -2.72 kPa and -4.64 kPa, respectively. During the dynamic wind uplift test, the vertical displacement of the roof panel increases more rapidly after a 50 % loading ratio. During the static wind uplift test, the vertical displacement of the roof panel changes abruptly when the roof panel fails. The ultimate loads of the roof panel in areas without and with anti-wind clips are 5.6 kPa and 10.5 kPa, respectively. The wind load uplift capacity of the roof system is correlated with the detailed structural parameters, and the width of the semi-circular end of the fixed support has the most significant effect on the wind load uplift capacity of the roof panel. Therefore, it is necessary to consider the effect of these detailed structural parameters on the wind resistance of the roof panel system in the design.