铝镁锰直立锁边金属屋面抗风揭性能试验研究与理论分析

铝镁锰直立锁边金属屋面广泛应用于各类大跨度建筑中,但是关于其抗风揭性能的理论研究较滞后,也缺乏系统性试验研究.为研究屋面板宽度、厚度、T形码支座间距等因素对其抗风揭性能的影响,对12组24个金属屋面试件进行了抗风揭试验.采用接触单元建立了有限元实体模型,模拟其破坏过程,并给出合理的破坏判定准则.提出简化计算模型,推导了...

Experimental study and theoretical analysis on performance of aluminum-magnesium-manganese standing seam metal roof under uplift wind load

Aluminum-magnesium-manganese vertical lock metal roof is commonly used in various long-span buildings. However, the theoretical research on the wind resistance of aluminum-magnesium-manganese vertical lock metal roof is still lacking, and there is a lack of relevant systematic experimental research. To study the influence of panel width, thickness, T-code spacing on the performance of metal roof under wind uplift load, 12 groups of 24 metal roof specimens were tested. The finite element solid models with contact elements were established to simulate the failure process and obtain reasonable destruction criteria. A simplified calculation model was proposed and the calculation formula of ultimate wind pressure was derived. The research results show that the initial gap defect of locked edges can significantly reduce the uplift wind resistance of the metal roofs, with the failures of all specimens caused by the disengagement of locked edges. The ultimate wind pressure can be slightly improved with the increasing length of T-code, and significantly improved with the reduced panel width, T-code spacing, and the increased panel thickness, most significantly promoted when wind-resistant fixtures are installed. The finite element analysis and calculation results agree well with the experimental results, which can verify the correctness of the finite element model and calculation formula of ultimate wind pressure.The research results can provide a reference for the design and performance evaluation of uplift wind resistance of the vertical lock metal roofs.