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大型场馆屋面系统大多采用金属屋面板,此类屋面板在风荷载作用下容易发生破坏。通过堆砂静力试验方法模拟风荷载对屋面产生的静压力,对采用65/400(3004型)铝镁锰合金屋面板的某体育馆屋面系统模型的抗风承载力进行了试验研究,分别实测无防风夹、满布防风夹和周边布设防风夹三类屋面系统的变形及极限承载力,根据试验结果对屋面系统在模拟风荷载作用下的破坏机理进行分析。结果表明:屋面板与T形支座直立锁边咬合连接破坏是屋面系统破坏的主要原因,加设防风夹后屋面系统承载力有很大提高;在不考虑屋面板大变形的情况下,无防风夹试验屋面的极限荷载达1.4k N/m2,周边布设防风夹的试验屋面的极限荷载可以达到3.0k N/m2,满布防风夹的试验屋面的极限荷载可以达到5.0k N/m2;据推算,单个防风夹可以提供1.27k N承载力。
Large venues most of the roofing system uses metal roofing panels, such roofing panels prone to damage under wind loads. The static pressure generated by the wind load on the roof was simulated by the static sand test method. The wind-proof bearing capacity of a gymnasium roofing system model with 65/400 (3004) aluminum-manganese-manganese alloy roof panels was tested. No wind-clamp, wind-clamp and wind-clamp around the layout of the three types of roofing system deformation and ultimate bearing capacity, according to the test results of the roof system under simulated wind load failure mechanism analysis. The results show that the failure of the erection joint of the upright locking edge of the roof slab and the T-shaped support is the main reason for the damage of the roofing system. The bearing capacity of the roofing system with the windproof clip is greatly improved. Without considering the large deformation of the roofing slab, The ultimate load of windproof clamp test roof is 1.4k N / m2, the limit load of windproof clamp test roof can reach 3.0k N / m2, and the limit load of windproof clamp test roof can reach 5.0k N / m2. It is estimated that a single windbreaker can provide 1.27k N bearing capacity.