直立锁边金属屋面系统抗风设计与结构承载力试验

Wind resistance design and structural bearing capacity test of standing seam metal roofing system

直立锁边金属屋面因抗风揭强度不足常出现风揭破坏。为了详细分析直立锁边金属屋面系统的抗风揭性能,首先,提出了抗风设计关键技术问题。然后,对屋面关键部位的风荷载计算和屋面系统的结构抗力进行研究。最后,对如何选择抗风揭试验方法来获得结构承载力进行对比分析。结果表明,在计算屋面风荷载时,应重点关注局部关键部位,采取规范计算和风洞试验相结合的方法进行验证;在确定直立锁边金属屋面系统结构承载力时,需综合考虑抗风揭静态和动态试验结果。

The standing seam metal roof often suffers from wind lift damage due to insufficient wind uplift strength.In order to analyze the wind uplift resistance characteristics of the standing seam metal roofing system in detail,firstly,the key technical problems of wind resistance design were put forward.Then,the wind load calculation of the key parts of the roof and the structural resistance of the roof system were studied.Finally,how to choose the wind uplift test method to obtain the bearing capacity of the structure were compared and analyzed.The results show that when calculating the roof wind load,the local key parts should be focused on,and the method of combining standard calculation and wind tunnel test should be adopted for verification.When determining the structural bearing capacity of the standing seam metal roof system,the static and dynamic wind uplift test results should be considered comprehensively.