带抗风夹的直立锁边屋面系统抗风性能的参数研究

PARAMETER STUDY ON WIND RESISTANT PERFORMANCE OF STANDING SEAM ROOF SYSTEM WITH ANTI-WIND CLIP

目前许多大跨建筑的屋面围护结构采用带抗风夹的直立锁边屋面系统来抵抗强风作用,但对于使用了抗风夹的直立锁边屋面系统在风荷载下的变形、应力等特征响应的变化鲜有深入研究。该文借助试验与数值模拟手段研究了板宽、板厚、抗风夹间距等参数对屋面系统特征响应及承载力的影响,提出了屋面系统的破坏准则并拟合得到了屋面系统的抗风承载力计算公式。研究表明,板厚每增加0.1 mm,承载力提高10%左右;板宽每减小100 mm,承载力提高25%左右;抗风夹间距小于1100 mm时,每减小100 mm,承载力提高20%左右,抗风夹间距大于1100 mm时,每减小100 mm,承载力提高10%左右;改变抗风夹构造对承载力影响不大。

At present,the standing seam roof system with anti-wind clips is adopted in many largespan buildings to resist the action of strong wind.However,few further studies have been conducted on the changes in the deformation,stress and other characteristic responses of the standing seam roof system with anti-wind clips under wind loading.By means of experiment and numerical simulation,the influence of plate width,plate thickness,spacing between wind clips and other parameters on the characteristic response and bearing capacity of the roof system is studied.The failure criterion of the roof system is proposed and the formula for calculating the bearing capacity of the roof system is obtained by fitting.The research shows that the bearing capacity increases by about 10%for every 0.1 mm increase in plate thickness.The bearing capacity increases by 25%for every 100 mm reduction in plate width.When the anti-wind clips spacing is less than 1100 mm,the bearing capacity increases by about 20%for each reduction of 100 mm.When the anti-wind clips spacing is more than 1100 mm,the bearing capacity increases by about 10%for each reduction of 100 mm.Changing the structure of an anti-wind clip has little effect on the bearing capacity.