金属屋面系统新型T形连接件抗风性能分析

Analysis of wind resistance performance of new T-shaped connector in metal roof system

金属屋面系统对风荷载格外敏感,各屋面构件通过连接件固定,当风荷载较大时容易造成连接失效破坏.根据金属屋面与连接件在风荷载作用下的受力情况及破坏模式,提出一种可自由转动的扣嵌式新型连接件,由连接件的转动来抵消屋面变形及缓解温度应力,使整个屋面系统灵活可变,从而提高整个屋面板的抗风揭性能.通过ANSYS软件建立有限元模型,对新型连接件进行数值模拟分析,获得新型T形连接件的抗风承载力及抗风失效模式,并与原T形连接件进行对比分析,验证新型T形连接件对提高金属屋面系统抗风揭能力的有效性及合理性.

The metal roof system is particularly sensitive to wind load,and the roof components are fixed by connectors,which is easy to cause connection failure under high wind loads.According to the stress distribution and failure mode of metal roof and connector under wind load,a novel snap-in type connector with free rotation capability puts forward.The rotation of the connector can offset the deformation of the roof and relieve the temperature-induced stress,rendering the whole roof system flexible and adaptable,so as to improve the anti-wind performance of the whole roof panel.The finite element model is established by the finite element software ANSYS,and the wind resistance bearing capacity and wind resistance failure mode of the new T-shaped connector is obtained.The effectiveness and rationality of the new T-shaped connector in enhancing the wind resistance of the metal roof system are verified by comparing it with the original T-shaped connector.